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Chevrolet Volt Electric Drive: Engineered for Efficiency
2010-10-12
DETROIT – As GM has started the media launch program for the Chevrolet Volt, some confusion has emerged about details of the Volt’s drive technology.
The engineering of the Voltec electric drive unit is very sophisticated. As part of the media launch, we're diving deeper into how the system works than we have in the past. We did not share all the details until now because the information was competitive and we awaited patent approvals. Following a small number of inaccurate media reports, we want to clarify a few points.
The Volt has an innovative electric drive system that can deliver power in both pure electric and extended range driving. The Voltec electric drive cannot operate without power from the electric motors. If the traction motor is disabled, the range-extending internal combustion engine cannot drive the vehicle by itself.
There is no direct mechanical connection (fixed gear ratio) between the Volt’s extended-range 1.4L engine and the drive wheels. In extended-range driving, the engine generates power that is fed through the drive unit and is balanced by the generator and traction motor. The resulting power flow provides a 10 to 15 percent improvement in highway fuel economy.
Our overriding objective in developing the Voltec electric drive was to deliver the most efficient, yet fun-to-drive experience in both pure electric and extended-range driving. We think our unique technology lives up to its most important promise: delivering our customers with the only EV that can be their primary vehicle, with EV operation for normal daily driving, and extended range driving for weekends, holidays, and longer trips – all with no range anxiety.
To read what journalists who have spent time with the Volt have to say, please click the links below:
Unbolting the Chevy Volt to See How it Ticks (MotorTrend.com)
"On paper, the Voltec drivetrain has more in common with a Prius (and other Toyota, Ford, or Nissan Altima hybrids) than anyone suspected. Each system employs a single planetary gear set, a gasoline-powered piston engine, and two electric motor/generators. But the way Chevy connects them is entirely different, and – if you ask me – superior."
Chevy Volt Surprise (Automobilemag.com)
"To trump both the Prius and the Leaf, Volt combines their merits in one handy advanced-technology sedan. It employs cheaper and cleaner electrical energy drawn from the grid. It provides efficient electric drive without the usual compromises. It uses gasoline intelligently in a supporting role. It is a pure electric, a series hybrid, and a parallel hybrid all rolled into one."
Please continue to follow the Volt launch in the media and on the Chevrolet Europe media site and the Volt Media Portal.
About Chevrolet
Chevrolet is General Motors' largest global brand with annual sales of about 3.5 million vehicles in more than 130 countries. It is the fourth biggest global car brand in terms of sales and also one of the fastest growing brands in the world. Chevrolet Europe delivers attractive, distinctive design, practical, economical cars and outstanding value for money. After re-launching the brand in Europe in 2005, Chevrolet more than doubled its sales to over 500,000 in 2008. In 2009, Chevrolet held its market share in Europe at 2.3 percent, selling 426,000 cars. Chevrolet has a network of 2,900 dealers and service points in Europe. The Chevrolet line-up includes the all-new Spark city car, the small Aveo, compact Cruze sedan, Captiva SUV, mid-size Epica and the legendary Corvette sports car. In 2011, Chevrolet will launch the Orlando, an all-new family van, the Camaro coupe and convertible, the new Aveo and the Cruze hatchback as well as re-launching the Captiva SUV with four new engines. Chevrolet's biggest markets in Europe are Russia, Italy, Germany, France, Spain and the U.K. Established in the U.S. by Swiss émigré Louis Chevrolet in 1911, the brand is preparing to celebrate its centenary with the launch of the ground-breaking Chevrolet Volt extended-range electric vehicle. More information on Chevrolet can be found at http://www.chevroleteurope.com or http://media.chevroleteurope.com.
