It seems to me that this idea
It seems to me that this idea has already been addressed by the market. I drive a Chevy Volt which averages, for me, 146 miles to the gallon because its on-board gas-powered generated recharges the 40 mile/charge battery. So GM gets the prize and beats the 100 mpg target easily.
Jill Sorensen
Baltimore-Washington Electric Vehicle Initiative (BEVI)