The automobile engine
Internal combustion engines,are engines in which the fuel is burnt inside the engine itself, as compared with external combustion engines like the steam engine,where the fuel is burnt outside the working cylinder of the engine. The petrol engine and the diesel engine as used in modern automobiles, are both internal combustion engines. In the process of combustion, the chemical energy of the fuel is converted into heat energy,and part of this heat energy is converted into mechanical energy by the engine.
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