Quote:
Originally Posted by matt36415
If you found a way to take all of that energy, there would be no air movement past the throttle. The more restrictive the intake, the more energy is needed to pull the air into the cylinders so more fuel is needed.
It is not a source of ‘free’ energy.
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Matt, the first part of your quote is not correct.
If an engine is pulling say 7 psi of manifold vacuum then if the throttle plate was replaced by a turbine driving an electrical generator then energy could be extracted.
The correct gas flow will still occur.
The only time energy cannot be extracted is at WOT.
For the system to work the turbine would have to spin at precisely the right speed that will result in the requested manifold vacuum.