Quote:
Originally Posted by JacobAziza
In other words, because ICEs are SO inefficient, just having the engine turn actually takes more fuel than actually moving the car. Therefor the greatest potential reduction in fuel comes from it not turning at all.
Someone please explain to me differently if I am missing something.
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You just need one more thing. It's because ICEs are so inefficient at part load that P&G works. They're fairly inefficient even at their most efficient, but at part load their efficiency is worse. It's more efficient to operate an engine periodically at peak load than it is to operate it constantly at part load, all things being equal.