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Old 12-02-2020, 09:27 AM   #5 (permalink)
ProDigit
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It would be a nice project, however, the reverse is really how a hybrid needs to run efficiently.
Ger an all electric car, and equip ot with a tiny engine, that directly drives the wheel through a reduction gear (gasolime or diesel). The thrust the tiny engine provides significantly increases electric range. And since the engine doesn't need to accelerate the car, just provide enoigh thrust to coast, getting 100mpg wpuld be an easy thing out of it.
The electric motors are there to accelerate the car to cruising speeds, and get disactivated when cruising at the fixed 30/45/60 mph speed limits of your regions, and only get activated again, when needing to overtake or speed up again.

Apparently Koenigsegg applied a similar technique in one of their newest cars, they equipped it with a tiny 400hp engine to provide extra thrust to the front wheels.
Though not with the intent of reducing emissions or increasing mpg, but with the intent to increase range.
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