![]() One way thermodynamic efficiency can improve in engines is through a higher compression ratio. However, in general, gasoline engines convert 20% of the fuel (chemical energy) to mechanical energy in which only 15% will be used to move the wheels. ![]() The thermal efficiency of these gasoline engines will vary depending on the model and design of the vehicle. ![]() The remaining exhaust gas is pushed out by the piston as it moves back upwards.
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