Quote:
Originally Posted by solarguy
It's not as big an energy investment as it sounds. The fuel is -going- to get heated. You are -going- to spend the energy to heat the fuel. The engine won't run otherwise.
But with this system, the fuel gets preheated electrically, and less energy in the combustion chamber gets wasted to heat the fuel.
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That makes no sense at all.
People on this site tend to get too excited when they see "heat" and some drivetrain part in the same sentence. It's very clear that this is for
startup only. When the engine is running, the fuel cooling down the valves and combustion chamber is necessary to prevent knock. At the very least, a lower starting temperature for the charge causes less pressure throughout the compression cycle and reduces frictional losses, and slightly increases thermodynamic efficiency.