What is the efficiency of a gasoline engine?
1 Answers
The efficiency of a gasoline engine ranges between 80% and 90%. Engine efficiency refers to the ratio of the thermal equivalent of the engine's effective power to the heat content of the fuel consumed per unit time, which is used to evaluate the economic performance of the engine as a heat engine. From the perspective of energy conversion, the efficiency of converting electrical energy into kinetic energy is the highest, reaching up to 100%, and is generated by non-quasi-static processes (friction losses). Currently, the efficiency of a gasoline engine is generally one-fourth to one-fifth that of an electric motor, i.e., around 20%. If the mechanical efficiency is taken as 0.85, the effective thermal efficiency of a gasoline engine is approximately between 20% and 35%; the effective thermal efficiency of a diesel engine ranges between 35% and 43%. Diesel engines experience gas leakage in areas such as the combustion chamber and cylinder seals. Changes in combustion chamber volume, such as replacing with a thicker cylinder gasket, intake efficiency (air filter clogging, turbocharger sticking, poor exhaust, camshaft wear, incorrect valve timing, intake pipe leakage, poor diesel engine cooling heating intake, etc.), fuel injection and mixing efficiency. Issues like carbon buildup jamming the injector, wear of the fuel pump plunger, decreased injector pressure, incorrect injection timing, etc.
