TOMORROW'S HYBRID

摘要

The ReCharge, Volvo's concept plug-in hybrid, could squeeze 160 miles from a gallon of gas by tossing out the power-wasting transmission. It packs a small electric motor inside each wheel, so that no power is lost in the drivetrain. Here's a look at the next generation ofrnfuel-efficiency. rnPutting electric motors directly inside the wheels eliminates the transmission, which typically wastes 10 to 20 percent of the engine's energy. Anrninterior disc, mounted to the wheel bearings, contains a series of independently controlledrnelectromagnets, which emit a magnetic field in response to an electrical current.