Here’s an advanced propulsion system that sought to answer a question not yet asked. As Toyota looked forward in the mid-1990s, it launched an inspired program to engineer an all-new powerplant that would be highly fuel efficient, offer extremely low tailpipe and carbon emissions, and feature unheard of environmental performance. The Toyota Hybrid System – now Toyota’s Hybrid Synergy Drive – was the result that debuted in the all-new Prius that hit the world stage in 1997 and emerged on our shores in 2000. It has been refined over the years to deliver more power and even greater efficiency, eventually making its way to a great many Toyota and Lexus models today. This article is reprinted just as it ran in Green Car Journal’s Winter 2004 issue, sharing our perspective 20 years ago on how important a breakthrough this innovative propulsion technology represented at the time, and why it continues to resonate in the automotive market today.
Excerpted from Winter 2004 Issue: Years ago, as automakers struggled to engineer electric vehicles that could offer practical driving range between charges, more pragmatic developers proposed overcoming the battery EV’s range limitation with a ‘range extender.’ Simply, this concept would add a small on-board gasoline engine to keep batteries charged and supplement electric propulsion when more power was needed.
While no longer a true zero emission vehicle – a key goal of electric vehicle enthusiasts – the concept promised cars that would appeal to a mass market. It would provide significantly higher fuel economy than conventional automobiles and achieve near zero emissions levels, all the while offering performance, functionality, and affordability similar to that of the familiar internal combustion engine vehicles we’ve driven for many decades. This concept has evolved into today’s gasoline-electric hybrid vehicle (HEV).
Toyota and Honda can be credited with first producing HEVs that appealed to wide spectrum of vehicle buyers. Toyota introduced its first-generation Prius hybrid in 1997 to the Japanese market. North America saw its first hybrids with the debut of Honda’s two-seat Insight as an early 2001 model, shortly followed by the introduction of the Toyota Prius to American roads.
Toyota uses its sophisticated Hybrid Synergy Drive system to power today’s Prius, a follow-on to the first-generation Toyota Hybrid System. Both automakers are now offering their second generation hybrid vehicles. In 2003, Honda introduced the five-passenger Honda Civic Hybrid, which offers a more powerful adaptation of its Integrated Motor Assist (IMA) hybrid system. A completely redesigned and more powerful Prius appeared as a 2004 model.
Both the Toyota and Honda hybrids are parallel configurations, with wheels driven by both their internal combustion engine and electric motor. In detail, however, they work quite differently. The Honda IMA system’s electric motor/generator supplies additional power to the gasoline engine when needed for acceleration or when driving demands are greater, such as when climbing grades, thus the designation ‘motor assist.’ The Honda gasoline engine always provides propulsion.
Things are reversed with Toyota’s Hybrid Synergy Drive, which finds the Prius starting out on battery electric power. The gasoline engine seamlessly starts up to provide additional power during acceleration, at higher speeds, or when driving up grades. This ability to run at times on battery power alone is an important distinction to some folks, since this means Toyota’s hybrids are actually zero emission vehicles during the time they’re electrically driven. Honda’s hybrids cannot do this.
The Prius uses a four-cylinder, 1.5-liter Atkinson cycle engine. The four-stroke Atkinson cycle, invented by James Atkinson in 1882, is different than the Otto cycle engine we’re used to driving in very distinct ways. Compared to the Otto cycle, where the intake valve is closed near bottom-dead-center, the Atkinson cycle does not close the intake valve at BDC, but leaves it open as the piston rises on the compression stroke. What this means is that some of the air/fuel charge is pushed back out and into the intake manifold and is used in other cylinders. This reduces the volume of the air/fuel mixture that’s compressed and combusted without severely restricting the throttle opening. Restricting throttle opening results in large pumping losses and greatly reduced efficiency. This method of reducing power output without incurring large pumping losses makes the Prius engine much more efficient than a conventional Otto cycle engine under most operating conditions. Effectively, the use of the Atkinson cycle allows the Prius engine to operate quite efficiently at relatively low power levels while still having sufficient power for climbing hills at freeway speeds.
Prius uses the same basic 1.5 liter engine as the Toyota Echo, an engine rated at 108 horsepower at 6000 rpm. The Atkinson cycle allows the engine to be downsized to 76 horsepower at 4600 rpm while still being as efficient, or perhaps more so, than the Echo variant. Also, adding a supercharger to the Atkinson cycle results in the Miller cycle like that used in the Mazda Millenia.
Variable intake valve timing (VVT-I) reduces cylinder pressure to eliminate knocking, important because the engine has a 13:1 compression ratio. A high compression ratio, while good for performance and efficiency, can lead to pre-ignition (knocking), which can damage an engine if unchecked. The aluminum, dual overhead camshaft (DOHC) 16-valve engine produces 76 horsepower at 5000 rpm and 82 lbs-ft of torque at 4200 rpm. Because the engine speed is limited, it can use smaller and lighter components for improved fuel economy. The engine earns an Advanced Technology Partial Zero Emission Vehicle (AT-PZEV) rating, is a Super Ultra Low Emission Vehicle (SULEV), and has an EPA rating of 60 mpg city/51 mpg highway, for a combined estimated 55 mpg fuel economy rating.
Toyota’s HSD also takes special measures to address cold start emissions. Since combustion is not as efficient when an engine is cold and a catalytic converter must reach operating temperature before it can treat exhaust gases, cold starts result in greater emissions levels. The HSD system stores hot coolant in a three-liter vacuum bottle and dumps this into the engine during a cold start to help remedy this.
The permanent magnet, AC (alternating current) synchronous motor produces 67 horsepower (50 kilowatts) at 1200-1540 rpm. Most importantly, it produces 295 lbs-ft of torque at 0-1000 rpm, more than enough to get the car going without help from the gasoline engine. A sealed nickel-metal-hydride (NiMH) battery is used.
An inverter converts the battery’s DC (direct current) to AC for use by the electric motor and generator, and vice-versa. Precise current and voltage control is assured by an intelligent power module. A built-in transformer converts some of the hybrid battery’s power into 12 volts DC to operate vehicle accessories. In the latest generation Prius, the high voltage converter system increases battery voltage from 202 volts to 500 volts for driving the electric motor. This reduces power loss by up to 25 percent because electricity can be supplied at lower current, ensuring large amounts of electricity to the motor for significantly greater output while allowing for a smaller battery.
The Prius’ transaxle contains a planetary gear that adjusts and blends the amount of torque from the engine and motor as it’s applied to the front wheels. It also functions as a continuously variable transmission (CVT) with drive ratio controlled by varying the rpm of the generator that also runs off the planetary gear. This Power Split Device allows the engine to operate in its most efficient load and speed range most of the time. The planetary gear system connects the engine, generator, and motor together, allowing operation in a parallel hybrid mode with the electric motor and gasoline alone or together powering the car. It can also operate like a series hybrid when the gasoline engine operates independently of the vehicle speed to charge the battery or provide power to the wheels. Finally, it allows the generator to start the engine so a separate starter is not needed.
Toyota’s Hybrid Synergy Drive is presently packaged in the sleek, aerodynamic, and efficient five-door Prius hatchback that’s officially classified as a mid-sized car, quite a leap forward from the compact and somewhat quirky first generation Prius. This advanced hybrid vehicle shares virtually nothing with other Toyota models. Features include a throttle-by-wire and an electric air compressor for the air conditioning.
Hybrid Synergy Drive is quite scalable, so expect to see it used in other Toyota and Lexus models. For example, it will be used in the 2006 Lexus RX 400h luxury SUV that will go on sale this coming April 15, along with the Toyota Highlander Hybrid that will debut later in the year. Both models are expected to be mated to a 3.3-liter V-6 engine with front and optional rear motors, in a package producing 270 horsepower. Other Toyota hybrid models will be sure to follow.
With Nissan and Ford already HSD licensees and other automakers reportedly investigating this acclaimed hybrid system for their own models, Toyota has clearly gambled big with its huge investment in this technology, and won big as well. We’ll surely be seeing a lot of Toyota’s Hybrid Synergy Drive in the years ahead.
A growing number of car buyers are showing a keen interest in hybrids, those super-efficient cars, trucks, and SUVs that combine the benefits of both electric and internal combustion power. For some, it’s all about stellar fuel economy. Others see a hybrid as an easy entry into electrified vehicles without taking the more unfamiliar leap to a plug-in model, or paying the extra cost.
Whatever the motivation, we’re huge believers in hybrids because of their many obvious benefits. Ready to bust a move? Here are 10 fuel efficient hybrids from five automakers that deliver 37 to 57 combined mpg, available with a reasonable manufacturer’s suggested retail price (MSRP) of $25,000 to $34,000. Yeah, we realize that some models could be in short supply at times and others may be so popular dealers are tempted to add on a mark-up over and above the MSRP. It that’s the case then keep looking since cross-shopping dealers online is pretty straightforward these days and you may find a better deal just a short drive away.
We’re behind the wheel of our Toyota RAV4 long-term test vehicle and just looked at the instrument cluster’s mpg reading. It’s showing 43 mpg toward the end of our 150 mile cruise on the 101 freeway along California’s Central Coast. There was no traffic to speak of, so we had kept our ride at a fairly steady state around 65-70 mph, reasonable for this stretch of California highway though far short of the much faster speeds and stop-and-start driving experienced in Southern California.
The surprise? This welcome fuel efficiency was achieved without hybrid or plug-in power. We were piloting a Toyota RAV4 XLE crossover powered by a 2.5-liter four-cylinder that, at the time we started our adventure, came with a manufacturer’s suggested price of $29,085, topping out at $33,987 after options. Adding to the surprise is that EPA rates this RAV4 at 34 mpg on the highway and 27 mpg in the city. We were beating that by a long shot, not through crazy hypermiling techniques but simply by easy driving without unnecessary bursts of acceleration or driving at higher speeds.
Look, reality check: While that kind of better-than-EPA fuel efficiency can’t be expected as a matter of course – because, let’s face it, we aren’t always driving traffic-free and there are times when we want to go fast – it is possible, as our experience showed. There is a lesson here for anyone who wants to optimize efficiency and lessen their carbon emissions while driving conventional vehicles. High fuel efficiency is out there for those who actively seek it.
During our drives, the RAV4 consistently delivered all the power we needed, seamlessly delivered to pavement through an 8-speed electronically controlled automatic transmission. Riding on independent MacPherson strut suspension up front with multi-link suspension at the rear, we found ride and handling on the money, as we would expect from Toyota. Along the way we have also appreciated filling up with regular 87 octane gas rather than the premium that some models require, which costs up to 35 to 40 cents per gallon more than regular grade in our area.
Inside this RAV4 is a well-appointed interior with an 8 inch multimedia touch display offering Apple CarPlay and Android Auto connectivity. Nicely bolstered seats provide plenty of comfort as the miles drift by. While our RAV4 came with cloth seats and we prefer leather (or these days, artificial leather), Toyota’s SofTex synthetic leather seating only comes with the uplevel XLE Premium trim at nearly $3,000 more, so cloth it is. Hauling life’s usual stuff is well handled with 37 cubic feet of storage behind the rear seat and 70 cubic feet total with the rear seat folded.
Cloth seats aside, our only complaint, and it’s a mild one, is the RAV4’s stop-start system sometimes engages a bit too abruptly from a stop, something we have experienced in other models with stop-start functionality as well. We chalk that up to the quest for maximum efficiency as the engine is shut down after a pause when stopped, then automatically started again when the brake pedal is released.
After six months in our long-term test fleet and some 5,000 miles on the odometer, we can say this: Toyota’s RAV4 is a rock-solid choice for those looking to drive a conventionally powered small SUV at a price a great many can afford. We still find ourselves beating EPA mpg estimates by at least a few mpg if we’re focused, but most of the time we are in the range of the 27 to 34 mpg efficiency expected of this model, depending on whether we’re doing city or highway driving. We’re pretty enthused with our daily drives in this RAV4 test car and looking forward to sharing our continuing experiences in the months ahead.
The Volvo S60 model introduced in 2000 was positioned to compete with the popular BMW 3 Series and Mercedes-Benz C-Class of the time. Since then, it has been a popular staple for the Swedish automaker. Now well into its third generation, the S60 has evolved as part of Volvo’s promise to electrify its entire fleet and now is available exclusively in electrified form as a plug-in hybrid. Green Car Journal editors had the opportunity to spend time behind the wheel of this Volvo PHEV and came away impressed by its style and satisfied with its overall performance.
Volvo has borrowed from its subsidiary company Polestar for power. The S60 is equipped with a 312 horsepower 2.0-liter, turbocharged inline-four cylinder engine augmented with a 143 horsepower electric motor located at the rear. Energy for the motor is supplied by an 18.8 kWh battery. The combination ekes an impressive 455 horsepower and 523 lb-ft torque overall. Power is handled by an eight-speed Aisin automatic transmission and distributed via an all-wheel-drive system.
The S60 offers a combined EPA-rated range of 530 miles. If drivers choose to use the S60’s Pure driving mode using only the battery, they should expect an EPA range of about 41 miles. When using Pure mode, the S60 Recharge is rear-wheel-drive. The 14.9 kWh battery can be charged to full capacity in about five hours using a 220-volt charger.
The exterior of the Volvo S60 Recharge can be summed up in one word: refined. When looking over the front of the vehicle one notices Volvo’s familiar Thor’s Hammer LED-accented headlights, with the large Volvo badge front and center. Its hood slopes down toward the fenders at either end to lend a slightly muscular appearance. At its flanks, the S60’s roofline rakes gently to its rear haunches and ends abruptly at the rear end, again giving it an air of muscularity. A high trunk line is accented by a small rear diffuser and familiar Volvo taillights at the back.
Stepping into the S60’s interior presents another example of a refined experience. A sleek and functional design here finds Volvo’s nine-inch infotainment screen taking center stage. Large HVAC vents frame the screen with a brushed aluminum trim piece accenting the bottom of the dashboard. Adequate storage is present in the center console and doors pockets. Rear seat passengers get a good amount of legroom for two adults in the outboard positions but less so in the middle position. Two B-pillar-mounted HVAC vents provide heated or cooled air to passengers on both sides. Trunk space is adequate for a mid-size sedan, though depth and a spare tire is sacrificed to store more batteries beneath the floor.
Volvo employs a new Android OS for its infotainment system that integrates an array of features into its tech arsenal. Google Maps is incorporated, with the S60 utilizing GPS information to adjust efficiency parameters according to driving conditions encountered in city or highway driving. A 12.3-inch digital gauge cluster ahead of the driver is also capable of displaying Google Maps information. A handy heads-up display lends the ability to easily read current speed and other information without taking eyes off the road.
A proud hallmark of Volvo is safety, and the S60 Recharge is no exception. The car received a five out of five star crash test safety rating, along with receiving Volvo’s award winning safety tech. The S60 Recharge is equipped with 360-degree cameras, Blind Sport Warning, Cross-Traffic Alert, among other notable tech features. Four trim levels are offered including the base Core, mid-range Plus, and Ultimate trims, all available in an aptly named Black Edition that adds black accented wheels, grille, and badges.
The Volvo S60 Recharge T8 is a welcome blend of refinement and power offering an entry price of $51,950. It bears consideration as a great all-around car for anyone desiring the ability to get home quickly and in comfort while also stepping up to the environmental benefits of plug-in electric power.
Consumer demand for electric vehicles (EVs) is at an all-time high – in fact, EV sales saw a 50 percent increase in the first half of this year, compared to 10 percent growth for combustion engine vehicles. Analysts estimate the U.S. will reach one million EV sales this year, and roughly one-third of U.S. drivers say they are considering an EV for their next car purchase. The Tesla Model Y is the best-selling car in the country.
These are the facts, yet I keep hearing claims about sagging EV demand. But to claim this is just flimsy cover for automakers who want to argue that a rapid transition away from polluting gas-powered cars and trucks is too ambitious.
Cox Automotive recently reported that EVs sit longer on dealership lots than do combustion engine vehicles. Based on that report, many media outlets concluded that EV demand is weak. Unfortunately, most analyses of Cox’s report ignore critical data and context.
For starters, Tesla, the best-selling EV manufacturer on the planet, does not use dealerships – so there is no data on the company factored into Cox’s report. Given that Tesla accounts for roughly 60 percent of all EVs sold in the U.S., to conclude that EV demand is low because EVs are sitting on dealer lots is judging demand based on only 40 percent of the market – and the weaker 40 percent at that.
For the EVs that are sold through dealers, Cox’s report looks at wait times for all EVs instead of differentiating by type – compact SUVs, hatchbacks, luxury electric trucks, etc. Internal combustion engine data is analyzed at a detailed level, instead of lumped together, so why do the opposite for EVs?
It’s 2023, and electric vehicles come in all sizes, shapes, and at wide-ranging price points. A closer look reveals that the EVs flagged for slower sales are largely big, expensive luxury SUVs or foreign-made luxury EVs. This isn’t just true for EVs: the slowest-selling gas-powered models right now are luxury cars and SUVs priced similarly to the slowest-selling EVs.
Vehicles ineligible for federal tax credits are seeing higher lot wait times than others. If consumer demand for EVs was the problem, all EVs would be sitting on lots, not just the expensive ones.
Smaller, more affordable EVs like the Chevy Bolt and Tesla Models 3 and Y have set records and drove EV sales to all-time highs in the second quarter of 2023. That’s not a surprise, because the gas-powered cars with the tightest inventories in the U.S. are also smaller cars and compact SUVs.
The issue is not demand, it’s affordability, and it's affecting gas and electric cars alike. If the market for EVs appears weak overall, it’s only because automakers are making too many larger, pricier models and not enough smaller, less expensive ones.
Analysis of the car market cannot ignore the broader economy. High interest rates and a turbulent economy are changing consumer spending habits for all kinds of products, including cars. Earlier this year, analysts found new gas-powered cars are out of reach for many consumers as interest rates rise and the average price hit almost $50,000 (a 30 percent increase from three years ago). Manufacturers have reduced the number of affordable models, leading many people to put off buying a car or opt for a used vehicle.
Clearly there is enormous demand for affordable EVs. Luckily,automakers have more resources than ever from the federal government to make the transition to electric vehicles and to make more affordable EVs available now. With the Inflation Reduction Act signed into law, new tax credits for EVs make some models even more affordable than comparable combustion engine cars.
EVs are more popular than ever, and Americans want to buy them. We are moving from the early-adopter phase to the mass market, and car companies should adjust their production accordingly. Instead of producing bigger, more expensive electric trucks and SUVs, automakers must make more affordable EVs to meet booming demand.
East Peterson-Trujillo is a clean vehicles campaigner at Public Citizen, a nonprofit consumer advocacy organization that champions the public interest, https://www.citizen.org/
Paying today’s crazy-high gas prices bring on some pretty serious reactions and a certain amount of denial. Many wonder when this will end. Some get angry. Others suck it up and just pay the price, figuring it will return to a reasonable cost at some point. Many are considering electric cars for the first time. But what can you do about it right now to cut your gas bill, in real time, with the car you’re driving?
The thought of boycotting your local gas stations is a pleasant thought but won’t work unless you’re already driving electric. You still need to get the kids to school, go grocery shopping, and get business done. You need some real options that make sense and can be done pretty easily.
Here are some strategies that come to mind. None involve dumping your car and getting a new one. We know that’s not always possible, especially today with unreasonably high car prices due to current conditions. You need to keep driving your everyday ride but just have to do something about the high gas costs that are wrecking your budget. So, consider giving these tips a shot.
YOUR ACTION PLAN
1. Start here: Don’t drive as much. Really, this isn’t as painful as it sounds. We’ve grown accustomed to our cars providing mobility on demand. That’s a good thing when it isn’t hurting our wallets or contributing to growing oil dependency. It’s not so good today. So plan ahead. Combining your day’s errands into sequential trips one after another is a great strategy. This is an easy way to save fuel, cut your gas bill, and lessen your carbon footprint. It will also decrease tailpipe emissions by eliminating unnecessary cold-starts when your car’s emissions control system is least effective.
2. Ease off on the pedal. Okay, maybe you’re not really hot rodding your way down the street. But chances are good you’re not thinking about taking it easy from one traffic light to the next. Light accelerator pressure and a conscious effort to avoid quick starts and stops do make a difference in fuel economy, sometimes a pretty big one. Give it a try. While you’re at it, smooth out your pedal pressure at highway speeds as well by using your cruise control whenever appropriate.
3. Feeling the need for speed? Let it go. It’s easy to creep past posted speed limits without thinking about it. That’s especially on urban highways where traffic often tends to move well beyond 65 mph. We’ve found some freeways regularly flowing at 80 mph and sometimes more. The problem is that fuel efficiency diminishes rapidly above 60 mph. The EPA points out that each 5 mph driven above that speed has the net effect of costing you about 20 cents more per gallon.
4. Do you need premium? If you’re filling up on mid-grade or premium fuel, check to see if you really need to do this. Some high-compression engines do require higher octane fuel to run properly. In fact, serious engine damage could result from using a lower grade fuel than is specified in your owner’s manual. But if you don’t need premium fuel you shouldn’t be filling up with it. Premium fuel costs about 20 to 40 cents more per gallon but doesn’t provide better performance in engines designed to run on regular. If you’re fueling up with premium and don’t need to, you’re essentially pumping cash out your tailpipe. Not a pleasant thought, is it?
MORE MONEY SAVING TIPS
5. Pressure can be a good thing. Check your tire pressure weekly and keep your tires aired up to the recommended psi. This is so simple you’d assume everyone does this regularly. Not so. And that’s too bad since tires with low pressure create greater rolling resistance that can cost you up to 3 percent in fuel efficiency. Tires heat up while you drive, so checking pressure while hot will give an artificially high reading. Make a habit of checking tire pressure before driving when your tires are cold. You might also consider buying more fuel efficient low rolling resistance tires the next time your car is ready for new treads.
6. Cash or card? This is an obvious one. Gas stations typically have prices posted for regular, mid-grade, and premium fuel. Two sets of prices are often shown, one for cash and one for credit/debit cards. You’ll often note that the cash price is significantly lower, often 20 cents per gallon less than if you use a card. So, you know what to do.
7. Shop around. Like any business, gas stations have competition. It’s often the case that gas prices can vary by as much as 50 cents per gallon, maybe more in a geographical area. We’re not suggesting that you waste gas by trolling for the lowest price, but do pay attention to posted prices as you go about your daily drives. You’ll see which stations tend to offer the lowest gas prices. One of the best ways to price shop is with a free service like GasBuddy that allows you to search online for your area’s lowest gas prices. Make the process even easier by downloading the app so you can check on price fluctuations on your phone whenever it’s convenient during your travels.
Efficient and innovative, the Honda Civic has always dared to be a little different. A look back at the first generation shows a diminutive two door hatchback that fit the subcompact mold. It was light and nimble, making it ideal for around-town duty. On the green technology front, early Civics featured Honda’s innovative CVCC (Compound Vortex Controlled Combustion) cylinder head. Unlike its competitors, the CVCC engine ran so clean the Civic passed then-new emissions standards without the need for a performance-robbing catalytic converter or other emissions devices.
Honda added a three-door hatchback model shortly after the Civic’s introduction. As many cars do, Civic grew in both size and weight over the years, an issue Honda solved with the introduction of the subcompact Honda Fit to fill the void in that class. An important ‘green’ milestone was the launch of a gasoline-electric hybrid version of the Civic to the U.S. market in 2002, as a 2003 model. This expanded the company’s hybrid efforts and provided Honda buyers a more mainstream choice than the Honda Insight hybrid that had entered the lineup in late 1999. The hybrid Civic was offered through the 2015 model year but discontinued after the launch of Honda’s larger Accord Hybrid.
Now in its 11th generation, Honda designers gave the 2022 Civic a clean design with a low hood and fenders for a sportier silhouette, exuding more of a European attitude. To keep the Civic line in tune with young and active buyers, an all-new and sportier Civic Hatchback with a Euro-inspired design is also offered.
Civic is powered by either a 2.0-liter naturally aspirated four-cylinder or a 1.5 liter turbocharged powerplant. The 2.0-liter four produces 158 horsepower and 138 lb-ft torque, with the 1.6-liter engine delivering 180 horsepower and 177 lb-ft. torque. Power transfers to the road via a continuously-variable transmission (CVT) with paddle shifters. The hatchback offers the same engine choices and CVT transmission as the sedan, but adds a six-speed manual gearbox option that adds to its sporty nature.
For improved handling and overall vehicle dynamics, the new Civic was designed with a 19 percent improvement in torsional rigidity compared to previous models. The Civic has a strong following with the tuner crowd and the stiffer chassis will lend itself to suspension mods.
Civic’s cabin is upgraded with sporty bucket seats up front that offer generous side bolsters. As you might expect, the 2022 Civic is offered with a full complement of tech features including a seven-inch color touch screen that pairs easily with Apple CarPlay and Android Auto devices. A nine-inch touch screen comes with the Touring trim package. A premium 12-speaker Bose sound system is optional. Civic drivers benefit from Honda Sensing, the automaker’s sophisticated suite of driver assist and active safety technologies.
One of the truly notable features of the new Honda Civic is its fuel efficiency, which has always been high throughout the years. For 2022, the Civic nets up to 42 mpg on the highway and 33 mpg in the city, achieved through its 1.5-liter turbocharged engine and without need for electrification. That efficient, straightforward approach helps keep Civic’s base price at $21,700, low enough for entry-level buyers in large numbers to benefit from high fuel efficiency and commensurately lower carbon emissions.
In fact, Civic has distinguished itself as the best-selling vehicle of any type with first-time buyers in America for the past seven years, with more than 1.7 million sold over the past five years alone. Civic has been built in North America for the past 35 years and the all-new 2022 11th generation model is no exception, coming from Honda’s Indiana assembly plant.
The 2022 Ford Maverick’s standard powertrain is an efficient gas-electric hybrid system that pairs a 2.5-liter, 162hp Atkinson-cycle four-cylinder gas engine with a 94kW permanent magnet electric motor, delivering a combined output of 191 hp and 155 lb-ft torque. A CVT drives the front wheels, with response controlled by several selectable drive modes including normal, eco, sport, slippery and tow/haul. Ford estimates the hybrid Maverick will return 40 city mpg and have a range of 500 miles. It also has a 2,000-pound towing capacity and can carry up to 1,500 pounds of payload in its 4.5-foot bed. All this goodness comes at a very affordable $20,000 base price.
An optional 2.0-liter EcoBoost four-cylinder gas engine is rated at 250 hp and 277 lb-ft. torque. It’s backed by a conventional 8-speed automatic transmission driving the front wheels, or all four with an optional AWD system. A 4K Tow Package available with the EcoBoost engine increases tow capacity to 4,000 pounds. Maverick is available in XL, XLT and Lariat trim levels
The Maverick’s cabin features bucket seats in front and a rear bench seat that flips up for storage bin access. Even in base XL trim, Maverick has a 4.2-inch productivity screen in the instrument cluster and an 8-inch center touchscreen with Apple CarPlay and Android Auto capability. The standard FordPass Connect system includes an embedded modem and can act as a wireless hotpot, while also enabling the owner to lock and unlock doors, check fuel level, and start the truck from a smartphone.
Ford Co-Pilot360 technology available for the Maverick has several safety features. Pre-collision assist with automatic emergency braking is standard, while adaptive cruise control, blind-spot information, cross-traffic alert, lane centering, and evasive steering assist round out the package as optional features.
An abbreviated 4.5-foot bed can carry the requisite 4x8-foot plywood sheets, provided the multi-position tailgate is opened to its half-way position so the plywood can rest on top of the wheel wells. Ford has designed several organization and storage features into the Maverick’s FlexBed, from tie-downs and D-rings to slots in the bed walls to hold 2x4s or 2x6s so owners can create their own storage areas. A scannable QR code in the bed links to other cargo carrying ideas. Removable covers in the back of the bed allow access to 12-volt power sources. Owners can also opt to have 110-volt, 400-watt outlets in the bed and the cab.
Maverick will be available in a First Edition option package that adds unique graphics, wheels, and tires to the Lariat trim level. An FX4 package available for AWD models includes all-season tires, suspension tuning, tow hooks, skid plates, upgraded cooling system components, hill-descent control, and the addition of mud/ruts and sand to the selectable drive modes.
Featuring an overall length of 195.7 inches, the four-door, five-passenger Santa Cruz is more than a foot shorter than the Honda Ridgeline and 4 inches shorter than Ford’s new Maverick, a size that works in its favor in crowded city environments. Hyundai also emphasizes driving dynamics in the engineering of the Santa Cruz, with its size, short wheelbase, and wide track contributing to a nimble, maneuverable nature (as does an optional all-wheel-drive system).
At its longest point along the floor the model’s sheet-molded composite bed measures just shy of 4.5 feet, with 42.7 inches between the wheel wells. Payload capacity maxes out at 1,753 pounds. The bed can be secured with a lockable tonneau cover and for versatility there are storage compartments in the bed walls and floor.
Two gasoline engines are offered for the Santa Cruz, delivering up to 27 highway mpg. Standard is a 2.5-liter, direct-injected four-cylinder producing 191 hp and 181 lb-ft torque. It’s backed by an 8-speed automatic. The optional direct-injected, 2.5-liter four-cylinder turbo is rated at 281 hp and 311 lb-ft torque, and connects to an 8-speed dual-clutch automatic with steering-wheel-mounted paddle shifters.
In standard trim the Santa Cruz is front-wheel drive, but both engines can be paired with Hyundai’s HTRAC all-wheel-drive system. Its electronic, variable-torque-split clutch with active torque control varies power delivery to the front and rear axles depending on road and driving conditions. The selectable Sport mode sends more power to the rear wheels for a sporty, dynamic experience. Ordering a Santa Cruz with the turbocharged engine and AWD raises towing capacity to 5,000 pounds, compared to its standard 3,500-pound rating.
Amenities in the Santa Cruz interior include a standard 8-inch touchscreen (10.25 inches in the Limited trim) with Android Auto and Apple CarPlay connectivity. A 4.2-inch multi-information display in front of the driver also increases to 10.25 inches in SEL Premium and Limited models. For charging personal devices, standard dual front-seat USB outlets can be augmented by an optional wireless charging system. Hyundai’s Digital Key app enables Android smart-phone control of several vehicle systems including door locks, engine start, and panic alert. Hyundai also offers a subscription-based Blue Link connected car app with features that include remote door lock/unlock, remote start with climate control, and stolen vehicle recovery.
The Santa Cruz is equipped with Hyundai’s SmartSense package of driver aids and safety features. Forward collision avoidance assist, lane keeping assist, and driver attention warning are standard. Blind spot collision avoidance, rear traffic safety alert, and a surround-view monitor are among the model’s options.
With the debut of a new high-efficiency Tradesman HFE EcoDiesel, the 2021 RAM 1500 full-size pickup can now be ordered in 11 different models and five engine options, two bed lengths, two cab configurations, and two- and four-wheel-drive powertrains. Whew! The five engines span a wide range of output and efficiency metrics, from the 6.2-liter, 702-horsepower supercharged Hemi V-8 in the newly introduced ‘Apex Predator’ TRX model to V-6 and V-8 mild-hybrid gas engines and a 3.0-liter turbodiesel.
The Italian-made EcoDiesel V-6, now in its third generation, features aluminum cylinder heads and dual overhead camshafts with four valves per cylinder. Induction is via high-pressure, direct-injection nozzles, while a water-cooled, variable-geometry turbine provides boost. The engine is rated at 260 horsepower and 480 lb-ft torque, has earned 22 city/32 highway mpg, and has a towing capacity of up to 12,560 pounds. The new Tradesman HFE EcoDiesel variant ups the ante to an unsurpassed 33 highway mpg, in a model that starts at $42,240
The mild-hybrid eTorque versions of the 3.6-liter Pentastar V-6 and 5.7-liter Hemi V-8 replace the standard engine alternator with a belt-driven motor-generator. Working with a 48-volt, 430 kWh lithium-ion nickel-manganese-cobalt battery pack, the motor-generator enables the engines’ stop/start function and brake-energy regeneration, and it provides short bursts of torque under certain driving conditions. The air-cooled battery pack is mounted to the back wall of the RAM's cab.
The eTorque Pentastar V-6 produces 305 horsepower and 269 lb-ft torque and is EPA rated at 20 city/25 highway mpg. The eTorque Hemi V-8 puts out 395 horsepower and 410 lb-ft torque and has earned 17 city/23 highway mpg ratings. By comparison, the 5.7-liter Hemi V-8 without eTorque assist has the same output ratings but lower fuel economy: 15 city/22 highway mpg. All these engines route their power through eight-speed TorqueFlite automatic transmissions.
New and improved driver aids available on the 2021 RAM 1500 include a full-color head-up display that can show up to five content areas at once; a digital rearview mirror that displays real-time video from a rear-facing camera (but can revert back to a traditional reflective mirror); and trailer-reverse steering control, which allows the driver to turn a dashboard-mounted dial in the intended direction of the trailer (handing the actual steering control to the system). Adaptive cruise control, forward-collision warning, blind-spot monitoring and pedestrian detection are also among the safety and security features available for the RAM.
The RAM 1500 remains the only light-duty full-size pickup in the segment with a coil-spring rear suspension system, which the maker says improves ride and handling while not compromising towing or hauling capacity. Buyers will find entry-level RAM 1500s starting at $32,595 and rising upward, with the high-performance TRX topping out the lineup at $70,095.
Kia’s compact SUV entered its fourth generation in 2021 with a complete exterior makeover, increased legroom and cargo space, and a raft of driver-assistance systems that have been made standard equipment. Four engine choices are offered in the all-new Sorento, including a new turbocharged direct-injection four-cylinder hybrid. A plug-in hybrid version of the turbocharged four is being introduced in Europe but there’s no confirmation if this will be coming here to the U.S.
The 2021 Sorento is built on Kia’s third-generation N3 platform, which is lighter but also stronger than the outgoing version. This increases the SUV’s wheelbase by nearly 1.4 inches, improves noise/vibration/harshness characteristics, and driving dynamics. It’s also versatile enough to accommodate the Sorento’s electrified drivetrain.
Conventional Sorento powertrains utilize Kia’s 2.5-liter GDI four-cylinder engines. In naturally aspirated form the 2.5 GDI produces 191 horsepower, while a new turbocharged 2.5 GDI makes 281 horsepower and 311 lb-ft torque. The hybrid pairs a 1.6-liter version of the GDI turbo with a 60 horsepower electric motor fed by a 1.5 kWh lithium-ion-polymer battery. The engine/motor combination produces a total of 227 horsepower and 258 lb-ft torque, which is routed through a six-speed automatic transmission driving the front wheels. EPA fuel economy estimates rate the Sorento turbo hybrid’s efficiency at 39 city and 35 highway mpg, and 37 mpg combined.
Kia offers the 2021 Sorento in five trim levels, though the hybrid is available in the mid-range S and EX trims only. Many of the Sorento’s standard features are shared between the two, but the EX has a higher level of content, with equipment that includes LED fog lights, a panoramic sunroof, and wireless phone charger. Both the S and EX models are fitted with standard 17-inch alloy wheels and P235 tires.
There are a total of 16 standard and optional ‘Drive Wise’ advanced driver-assistance systems available for the Sorento. Standard ADAS systems on the hybrid model include blind-spot and rear-traffic collision avoidance, parking distance warning (rear-facing only on S, front and rear on EX), intelligent speed limit assist, forward collision-avoidance assist, driver attention warning, and lane-keep and lane-departure-warning systems.
The cost of entry for the new Sorrento is $29,390. Pricing starts at $33,590 for the Sorrento Hybrid S, with the uplevel Hybrid EX variant commanding three grand more at $36,590.
The efficient plug-in hybrid variant of BMW’s third-generation X3 premium compact crossover, the X3 xDrive30e shares drivetrain components, technology, and driving characteristics with the automaker’s 330e plug-in sports sedan. Manufactured in Spartanburg North Carolina on BMW’s refreshed cluster architecture (CLAR) platform, the X3 x30e PHEV blends the efficiency of a hybrid powertrain, super low emissions, and instantaneous low to midrange torque for a spirited drive experience.
Motivation comes from BMW’s 2.0-liter direct injected, turbocharged 4-cylinder engine paired with a 107 horsepower electric motor. The result is 288 total combined horsepower and 310 lb-ft torque that provides a zero to 60 mpg sprint in 5.9 seconds. Fuel efficiency is EPA rated at 60 MPGe while driving on battery power, with a combined city/highway rating of 24 mpg on gasoline. It features an overall driving range of 340 miles on 13.2 gallons of gas plus 18 miles on battery power.
A frame-cradled, air-cooled 12.0 kWh lithium-ion battery supplies energy to the motor. Charging is via an on-board 3.7 kWh charger. Charge time is 3.5 to 6 hours depending on source. Gear shifting is delegated to the time-tested ZF 8-speed Sport Automatic transmission featuring sport and manual shift modes, steering wheel-mounted paddle shifters, and launch control. All-weather traction is enabled by BMW’s xDrive all-wheel drive.
The 5-passenger compact SUV features a driver-centric cockpit layout with premium materials like Sensatec upholstery, dark oak wood trim inlays, and quality hard and soft touch surfaces. Front seats feature 10-way power adjustment, with the rear offering 40/20/40 split and fold-down functionality with adjustable seat backs for passenger comfort. A 12.3-inch digital instrument cluster and 10.25-inch center information display provide information and controls, along with Apple CarPlay and Android Auto compatibility.
Standard equipment includes ‘smart key’ recognition and personal settings memory, a futuristic yet comprehensive electric drive monitor, remaining electric-only range minder, and navigation-controlled chassis efficiency monitoring. The latest in driver assist and active safety technology is offered. Rounding out this very comprehensive package are voice-activated commands, integrated navigation, optional 360-degree surround camera, premium audio, and automatic three-zone climate control. A two-way power glass moonroof is optional.
All this comes at a base price of $49,600, about $6,600 more than the conventionally-powered X3 xDrive 30i.
First making its appearance in 1966, the Corolla has proved to be a serious mainstay for the Toyota brand. To date it has sold over 46 million copies worldwide, along the way becoming the best-selling nameplate in the world. Its sales have far surpassing that of the original Volkswagen Beetle, the ubiquitous everyman’s car that was seemingly everywhere for years on end, but in actuality sold less than half the number achieved by the Corolla. Unlike the Beetle that remained true to its unmistakably simple form over its lifetime, Corollas have seen many major redesigns over the years and this year’s 2020 Corolla sedan features the model’s most compelling redesign in decades.
As with previous models, the 2020 Corolla’s strengths are its affordability, reliability, and notably high fuel economy. Now, it can add style to that list of strengths…along with the title 2020 Green Car of the Year®.
The latest Corollas use Toyota's New Global Architecture (TNGA). This brings a stiffer platform with an independent multilink rear suspension that replaces the previous torsion beam setup. The standard base engine on lower-end L, LE, and XLE trims is the long-used and dependable 1.8 liter four-cylinder engine, rated at 139 horsepower. Stepping up to SE and XSE trims bring a 169 horsepower, 2.0-liter four-cylinder powerplant to bear. Both are quite fuel efficient, with the 1.8-liter delivering 30 city/38 highway mpg and the 2.0-liter 31 city/40 highway mpg.
Power is delivered to the road through a 6-speed manual on the SE and an electronically controlled, continuously variable transmission on lower end models. Upper trims get a continuously variable transmission with intelligence. Shift Mode starts out with an actual first gear and then shifts to a CVT operation. Paddle shifters allow selection of 10 simulated gear ratios.
For optimum fuel economy there’s the new Corolla Hybrid LE model that features a 121 horsepower, 1.8-liter Atkinson-cycle four cylinder and a pair of electric motors. This highly efficient hybrid system achieves an impressive, Prius-like EPA estimated 52 combined mpg. Energy is provided by a 1.3 kWh nickel-metal hydride battery pack positioned under the rear seats, so trunk capacity is not compromised. Importantly, the Corolla Hybrid LE is priced at just $23,100, about $3,500 more than the base gasoline-powered model. Its high fuel efficiency, affordability to the masses, and huge worldwide sales means this model has an outsized impact on decreasing gasoline use and carbon emissions reductions.
In addition, this affordably-priced car offers a a full complement of driver assist systems that rivals those found in much more expensive vehicles. All versions have Toyota Safety Sense 2.0 as standard equipment. This package includes Toyota’s Pre-Collision System with Pedestrian Detection, Road Edge Detection and Sway Warning, Automatic High Beams, Lane Tracing Assist, and Road Sign Assist. Full-Speed Range Dynamic Cruise Control and Lane Departure Alert with Steering Assist are also part of the package.
Our time behind the wheel of a Corolla Hybrid LE proved this vehicle to be a great daily driver. It’s roomier than you would expect, quite comfortable, and delivers a satisfying driving experience while achieving its pretty amazing fuel efficiency. Acceleration is decent though not particularly quick, but then, buyers of the Corolla nameplate in its many forms are not shopping for high performance. They are shopping for value, durability, connectivity, safety, and efficiency, and with the 2020 Corolla they get all this in abundance.
Plus, of course, they now get an all-new Corolla with surprisingly attractive styling. While that might not have been the tipping point for buyers looking for top value and efficiency over the years, it’s sure an important addition that will draw even more interest in this enduring nameplate. And let’s not forget that with today’s greater interest in environmental performance – including significantly lower carbon emissions – the Corolla Hybrid becomes even more compelling as a champion for the cause, all the while sporting more mainstream appeal than many hybrids that came before it.
The ever-popular Mazda 3 is available as both a four-door sedan or five-door hatchback to fit differing tastes. Completely redesigned last year and built on an all-new platform, the sedan and hatchback have distinctly different rear side profiles and rear styling.
The Hatchback is available in Standard, Preferred, and Premium packages, with the sedan adding a Select package at the lower end. Both variants feature a prominent grille accented by slim LED headlights and daytime running lights. Adaptive headlights are offered on the top Premium package. All models are available with either two-wheel- or four-wheel-drive.
Power is delivered by an efficient 2.5-liter, 186 horsepower SKYACTIV-G2 engine featuring dual overhead valves, variable valve timing, and cylinder deactivation. This four-cylinder engine connects to a SKYACTIV-Drive 6-speed automatic transmission with sport mode. A 6-speed manual is available only on the hatchback with the Premium package. All-wheel-drive models use Mazda's i-ACTIV AWD all-wheel drive system. The model also offers the automaker’s latest-generation G-Vectoring Control Plus system that slightly reduces engine torque to sharpen steering feel.
Mazda's long-awaited SKYACTIV-X spark-controlled compression ignition (SPCCI) engine is now available in Mazda3 models Europe and expected to be offered here later in the model year. This innovative engine combines the best features of spark-ignition (gasoline) and combustion-ignition (diesel) engines without either of their disadvantages, while offering greater horsepower, torque, and fuel efficiency.
All 2020 Mazda trim levels now come standard with i-ACTIVSENSE driver-assist features that were previously standard only on higher trim levels. These include Lane Departure Warning, Lane-Keep Assist, Mazda Radar Cruise Control with Stop & Go, Driver Attention Alert, Blind-spot Monitoring, and Automatic Emergency Braking.
The Mazda3’s driver-focused cockpit includes a 7.0-inch instrument cluster screen and an 8.8-inch infotainment screen with Android Auto and Apple CarPlay. A head-up display is optional. The Mazda3 offers an entry price of $21,500 for the sedan and $23,700 for the hatchback variant.
First thing: Have you driven an electric car? If you’ve lived with one for a time, then you likely have some solid ideas of your EV’s best features. Those who have just done a few test drives or haven’t driven electric at all could use some illumination. So here you go.
1. Hey, speed racer! Most electric cars boast pretty impressive acceleration from a stop. Unlike an internal combustion engine, electric motors generate 100 percent of their torque right out of the gate, which means your launch from standing still can be much more aggressive than you would imagine. We’re not saying you should do this as a matter of course…just that it’s kinda fun to know that capability exists.
2. Charging is way cool. Really. There’s nothing like parking your car for the night, plugging in, and starting the next day with a full ‘tank’ of energy on board. Just imagine life without the need to stop at a gas station. If you’re able to sign up for an electric vehicle rate plan from your electric utility, then set your charging to take place at non-peak hours overnight. You’ll have a full charge in the morning at the least possible cost. Plus, an ever-expanding network of public chargers is available for charging away from home, and while many now require a fee, a great many still provide energy for free. So, benefit from the kindness of strangers.
3. Electric vehicles are quiet, so enjoy your solitude. In the early days of EV development during the 1990s, there were unexpected noises to contend with like gear whine, high frequency noise from motor controllers, and such mundane things as the sound of tires contacting pavement and wind rushing past the windshield. Really. The familiar sound of internal combustion that normally masks the everyday sounds of motoring was notably absent. Over the years electrics have been engineered with better and quieter controllers, additional soundproofing, and other engineering measures to create the quiet EVs we have today. Experience the Zen.
4. EVs are extraordinarily efficient so you’ll be saving money every mile you drive, compared to driving on gas. The exact amount varies since gasoline and electricity costs differ by state, region, and city. A recent analysis by the Department of Energy indicated the national average for a gallon of gas was $2.74 compared to $1.21 for an ‘eGallon.’ DOE’s calculations factor the cost of fueling with gas compared to a similar vehicle that runs on electricity. The difference is even more dramatic in California, where I recently fueled up with standard grade gas at $4.59 per gallon. I was glad to get behind the wheel of an electric at the earliest possible opportunity.
5. Driving electric is like being in an immersive game. You have an extraordinary level of influence over your car’s efficiency with instrumentation providing continuous feedback on your driving and how this is affecting range. That’s not as critical in an EV with a 250-mile range capability as it is in one that can go only 90 miles on a charge, but that doesn’t matter. You’ll find yourself intrigued by your car’s instant feedback on energy usage, battery status, and distance-to-empty. There will be times when you will consciously (or unconsciously) adjust acceleration, speed, and downhill coasting to eke out more miles on that constantly recalculating distance readout, since more efficient use of on-board energy adds miles in real-time. Backing off the accelerator early and coasting up to a red light to maximize regenerative braking that feeds energy to the batteries is also human nature for an EV driver. Game on!
Subaru’s first plug-in hybrid vehicle, the 2019 Crosstrek Hybrid, uses the Subaru Global Platform designed for hybrid and electric powertrains. It features new Subaru StarDrive Technology that integrates two electric motors, a 2.0-liter direct-injection SUBARU BOXER engine, Subaru Symmetrical All-Wheel Drive, and a new Lineartronic continuously variable transmission. With the series-parallel StarDrive Technology, one motor functions as an engine starter and as a generator powered by the engine to charge the lithium-ion hybrid battery. The second motor powers the vehicle in hybrid and electric driving modes. It also charges the hybrid battery during regenerative braking.
The plug-in SUV can reach speeds up to 65 mph in full electric mode and achieve 90 MPGe. It drives up to 17 miles exclusively on lithium-ion battery power and features a total range of 480 miles when using both gas and electric power.
The Crosstrek Hybrid features a Linerartronic CVT plus X-MODE and Hill Descent Control for enhanced performance in low-friction and off-road conditions. SI-DRIVE powertrain performance management allows tailoring throttle characteristics by choosing between Intelligent and Sport modes. Active Torque Vectoring applies light brake pressure to the inside front wheel while cornering for improved handling.
Crosstrek is well-equipped with the latest advanced driver assist technologies. Subaru EyeSight includes Pre-Collision Braking and Throttle Management, Adaptive Cruise Control, Lane Departure and Sway Warning, and Lane Keep Assist. Reverse Automatic Braking can apply the vehicle’s brakes if an obstacle is detected while reversing. Blind Spot Detection with Lane Change Assist and Cross Traffic Alert is standard. Pedestrian Alert provides an audible warning to pedestrians within the proximity of the vehicle while traveling below 20 mph.
The model’s STARLINK Multimedia Plus offers an 8-inch high-resolution touchscreen, Rear Vision Camera, Bluetooth hands-free phone and audio streaming connectivity, AM/FM stereo, and smartphone integration with Apple CarPlay, Android Auto, Aha, and Pandora as standard equipment. Multimedia Plus includes a single-disc CD player and voice activated controls for phone and Near Field Communication. Multimedia with Navigation adds navigation powered by TomTom, voice activated navigation, and over-the-air updates.
Remote Battery Charging Timer manages the Crosstrek Hybrid’s charging schedule and monitors its status. A STARLINK Safety and Security Plus package includes Remote Climate Control and Remote Battery Charging Timer, SOS emergency assistance, and automatic collision notification.
The all-new 2019 RAM 1500 debuted with eTorque mild hybrid technology, an efficiency-enhancing system that’s exclusive to the segment. This new feature, while potentially important to buyers seeking a fuel economy bump in the increasingly-crowded and always competitive light pickup field, is not readily understood by all. So here’s an overview on how RAM’s eTorque mild hybrid works.
Functionally, eTorque works by replacing the RAM’s conventional alternator with a more robust motor/generator in 3.6-liter V-6 and 5.7-liter V-8 HEMI engines. The eTorque-equipped V-6 mounts its Continental motor-generator in front of the engine with the pulley pointing aft. A dedicated, water cooled coolant circuit is used since the internal cooling fans in a typical alternator would not work in this configuration. In the HEMI V-8, a Magneti Marelli motor-generator mounts conventionally near the top of the engine where air cooling works fine. The 48-volt eTorque system adds 90 pounds to a the HEMI V-8 and 120 pounds to the V-6, with the water-cooling circuit accounting for the difference.
When lifting off the throttle at speed, eTorque’s motor/generator begins to generate electrical energy that feeds back to its battery pack while also smoothing transmission downshifts. It provides a brief torque boost of 90 lb-ft in V-6 RAMs and 130 lb-ft in V-8 models. Along with adding torque during shifts, it contributes torque while transitioning in and out of four-cylinder mode during V-8 cylinder deactivation. The eTorque system restarts the engine and resumes forward motion within 70 milliseconds after an auto-stop. An interactive deceleration fuel shut-off system also saves fuel.
Electrical energy in the eTorque system is stored in a 30 pound, 430 watt-hour LG Chem battery pack mounted at the rear wall of the pickup cab. The system includes a DC-to-DC converter to supply the vehicle’s regular electrical loads and charge its 12-volt starter battery.
Alternators only draw modest power from an engine’s accessory drive. However, eTorque’s motor-generators use their accessory drive belt to slow and accelerate these trucks, so the belt must be larger and stronger, and also must wrap farther around the pulley. It also requires a tensioner on both sides to keep belts tight as the motor/generator transitions from generating to motoring. The eTorque Hemi gets a larger crankshaft pully as well that improves the motor/generator’s leverage.
While Audi and Mercedes-Benz are selling similar systems in Europe, FCA (Fiat Chrysler Automobiles) is the first to market vehicles using the technology in large numbers in the U.S. With an estimated 2 to 3 mpg savings in city/combined fuel economy, eTorque delivers improved environmental performance and has the potential to have a measurable effect on FCA’s corporate average fuel economy as well.
Chevrolet introduced its efficiency-enhancing Active Fuel Management (AFM) cylinder deactivation system in 2005 and has now followed up with even more sophisticated Dynamic Fuel Management (DFM). While AFM alternates between eight- and four-cylinder operation, DFM features 17 cylinder patterns that constantly determine how many cylinders are required to meet real-time driving needs.
Dynamic Fuel Management uses a sophisticated controller that continuously monitors every movement of the accelerator pedal, running a complex sequence of calculations to determine how many cylinders are required to meet the required torque. It makes this determinations 80 times-per-second to optimize efficiency and power delivery at all speeds. with only the cylinders needed to provide this torque in play…down to a single cylinder.
An electromechanical system controls all 16 of the engine’s hydraulic valve lifters, using solenoids to deliver oil pressure to control ports in the lifters that activate or deactivate the lifters’ latching mechanisms. When a cylinder is deactivated, the two-piece lifters effectively collapse on themselves to prevent opening the valves. When the cylinder is reactivated, solenoids send an oil pressure signal to the control ports on the lifters and the latching mechanism restores normal function, allowing the valves to open and close.
The first application of GM’s Dynamic Fuel Management emerged in the 2019 model year, available on the all-new Chevrolet Silverado’s optional 5.3-liter and 6.2-liter V-8 engines. This efficiency-enhancing system will certainly find its way to additional models across the GM line. Chevrolet says DFM improves fuel economy by about 5 percent.