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Working of 4 stroke Petrol Engine

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Introduction to I.C (Internal Combustion) Engine

Internal Combustion Engine is a type of engine which converts chemical and thermal energy of fuel into mechanical energy. In this all the combustion process take place inside the combustion chamber hence combustion chamber is integral part of an engine. IC Engine Main Components of an IC engine :- Engine Head Inlet valve Outlet valve Piston Gudgeon pin Connecting rod Crank shaft Sump tank Cylinder Water Jacket Single cylinder IC engine Classification of an IC engine :- According to Thermodynamic cycle - Otto cycle Diesel cycle Dual cycle According to fuel used - Petrol/Gasoline Diesel CNG According to number of stroke - 2 stroke 4 stroke According to number of piston or cylinder - 1, 2, 3, 4, 6, 8, 12, 16 According to geometry of engine - Horizontal Vertical V shape Wshape Radial Inline According to cooling system - Air cool Oil cool Liquid cool According to ignition method - Spark ign

Basic Parts of an Automobile

Some Basic Parts of an Automobiles are :- Frame A frame is a main supporting of an automobile. All the components are fastened on the frame. It is also known as the skeleton of an automobile. Now generally car use uni-body frame while heavy vehicles like trucks, bus use chassis (vehicle without body). Frame can be of different type like ladder frame, x frame, etc. Engine (Power Plant) Engine is the power plant of an automobile. Basically engine is a machine which convert one form of energy into another. Automotive engine generally convert chemical & thermal energy (from fuel) in mechanical energy. Engine can be IC (internal combustion) or EC (external combustion). IC Engines are use in automobiles because of compact size and more efficiency. Further engines can be classified into many parts. For ex :- Petrol, Diesel, etc. The basic difference between the is thermodynamic cycles on which the engine works. Transmission Engine can only rotate

Working of 4 stroke Petrol Engine

4 stroke petrol engines are widely used in car, bikes etc. It is also known as SI (spark ignition) engine because combustion in petrol engine initiates from a spark. It is based on Otto cycle . It has four strokes i.e suction, compression, expansion (power) and exhaust stroke. Thus each stroke comprises of 180 degree rotation of the crankshaft. Petrol Engine The first practical petrol engine is build by Nikolaus August Otto in 1876 in Germany. Nikolaus August Otto Working of 4 stroke petrol engine :- Suction stroke :- In this stroke piston moves from TDC to BDC and in the mean time inlet valve get opened. Due to the downward movement of piston a low pressure is developed inside the combustion chamber which cause the intake of the air fuel (petrol) mixture. Intake valve remained opened till the piston reaches BDC. Suction stroke Compression stroke :- In this stroke the piston start moving toward TDC and because of both intake and exhaus

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