Two critical areas, battery life and the electronic switching between battery and engine power, are still being refined, but the car is on schedule to reach showrooms late in 2010, he said.
GM is simulating tests to make sure the new lithium-ion batteries last 10 years, Posawatz said.
"We're further along, but we're still quite a ways from home," he said. "We're developing quite a knowledge base on all this stuff. Our confidence is growing."
SHOOT: Nice to know, but the real focus needs to be on walkable living and working arrangements, not alternative driving arrangements This is because resources are becoming scarcer, and human populations increasing. The solution isn't more cars, it's fewer cars, and also fewer people.
WARREN, Mich. – General Motors Corp. said Tuesday its Chevrolet Volt rechargeable electric car should get 230 miles per gallon of gasoline in city driving, more than four times the mileage of the current champion, the Toyota Prius.
The Volt is powered by an electric motor and a battery pack with a 40-mile range. After that, a small internal combustion engine kicks in to generate electricity for a total range of 300 miles. The battery pack can be recharged from a standard home outlet.
If the figure is confirmed by the EPA, which does the tests for the mileage posted on new car door stickers, the Volt would be the first car to exceed triple-digit gas mileage, Posawatz said.
Henderson said charging the volt will cost about 40 cents a day.
"The EPA labels can and will be a game changer for us," he said.
Most automakers are working similar plug-in designs, but GM could be the leader with the Volt, which is due in showrooms late in 2010.
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