

In this stroke the suction valve opens, exhaust valves remain in close condition. In four-stroke engines, Valves are used instead of Ports. The various strokes in the operation of a four-stroke cycle petrol engine are described below. This type of engine based on the Otto cycle. Four-stroke cycle diesel engine Four-stroke Petrol engine:.The four-stroke engine generally classified in 2 types: Flywheel: It is mounted on the crankshaft and is made of cast iron.


Carburetor: It is used in a Petrol engine to mix the air-fuel properly.Fuel injector: It is used in a Diesel engine or CI engine to sprayed the fuel inside the engine cylinder.

