Quote:
Originally Posted by Piotrsko
Umm stupid question: if you force the fuel motor to start does that not include energy to recharge the battery which is reflected in the economy?
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Very good question!
1) Since the engine runs @ constant rpm, and is optimized for this specific rpm, it's likely to have one of the highest thermal efficiencies around. Perhaps 42%.
2) And since it's directly-coupled to the 3-phase alternator/ rectified generator, it has no 'powertrain' mechanical losses 'in between.'
3) The 'generator' might have a mechanical efficiency equal to the motor, @ 97%.
4) And GM's motor efficiency is right up there with Tesla and Lucid Air, around 97%.
5) If you're burning REGULAR UNLEADED, E10 gasoline, it's specific heat content is 111,836- Btus/ gallon.
6) From each gallon of gas, you'd have 46,971.12-Btus worth of energy from the engine.
7) 45,561.986-Btus from the 'generator,' into the motor. About 13.349-kWh available/gallon.