送交者: HunHunSheng 于 2005-10-13, 15:31:15:
回答: 为什么有些油电混合车开市内反而比开高速公路巡航还省油 由 4U4luC2 于 2005-10-13, 14:29:20:
Wlaking 5 miles consume much less calory than running 5 miles. Human is efficient at slow movement.
electric motor is very efficient at slow speed
but a gas engine is very ineficient at low speed