Engines are the powerhouse of vehicles and systems. It provides the energy to perform certain operations as desired in the machines. Here particularly we are talking about the engines used in the vehicles that we see on the road. Petrol and Diesel Engines have their specific applications and they both follow different cycles for providing power. Petrol Engines are also called SI Engines, i.e. Spark Ignition Engines. Petrol Engines are based on the Otto cycle. The name is given after the inventor of the cycle
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