送交者: PhonyDoctorPhD 于 2005-10-13, 16:14:03:
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:
Local mileage is lower for convention car due to
stop and go driving situation that wasted energy
on engine idling/reving.
Smart hybrid takes care of this and reverse the
situation, shutting down engine while recharging
battery on slow-down/braking.
The energy saved is then used for starting from
still when the light turns green. Therefore,
gas energy is used only to compensate the
imperfect transformation of energy between
go - > stop -> go.
At high speed, majority of wasted energy is due
to wind resistance that is not avoidable. Engine
must be rev high to compensate for the effect.
Even if one is cruising at unchanged speed in a
completely ideal situation, low speed still
wins in gas mileage due to lower wind resistance.