Quote:
Originally Posted by dcb
Not doubting you rofl, but can you provide a link to what you are referring to?
It sounds like confirmation of the inefficiency of electric regen on the surface though (soaks up plenty of braking energy but doesn't return much of it).
Either way, it is the rechargeable nature of the battery (or the accumulator) what makes a hybrid useful and not just a very lossy transmission (aka generator/pump running a motor).
The original porsche had batteries.
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Wait, I take back my take back! I was using force instead of mass, so while a Prius does have ~13000N of force it only weighs ~1300kg. 25 or so stops from ~11m/s (my guesstimate for the average speed to a stop on the FTP-72) is ~2 million Joules or ~.55kWh worth of energy. I figure round trip efficiency is only ~50%, so that's a contribution of ~.28kWh of energy, which would ordinarily take ~.84kWh of gasoline. The car uses ~7.7kWh of gasoline, so regen probably improves efficiency by ~10+%..