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Elements of Mechanical Engineering. Components of 4-stroke Engine. Created by:- Prashanth Nair Sawan Makwana Jigar Chauhan Harshil Gohel Saumil Joshi. BASIC COMPONENTS OF 4-stroke Engine. Camshaft. Intake Valve. Exhaust Valve. Valve Cover. Spark Plug. Intake Port. Exhaust Port.
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Elements of Mechanical Engineering Components of 4-stroke Engine Created by:- Prashanth Nair Sawan Makwana Jigar Chauhan Harshil Gohel Saumil Joshi
BASIC COMPONENTS OF 4-stroke Engine Camshaft Intake Valve Exhaust Valve Valve Cover Spark Plug Intake Port Exhaust Port Head Piston Connecting Rod Coolant Rod Bearings Engine Block Crankshaft Oil Pan Oil Sump
1.Frame • Frame generally consists of bed plate, crank case and supports the moving parts. • Bed plates are rigidly fixed with the foundation. • Lower portions of the crank cae contains oil for lubrication purpose.
2. Cylinder block and Cylinder • Cylinder block is assembled with frame and it consists cylinder bore and opening of valves. • Inside of cylinder formed by liner or sleeve. • Cylinder is the head of the Engine where fuel is burnt. • Some space is left between the cylinder blocks and the cylinder which is known as jackets for the flow of cooling water.
Piston • It is a cylindrical component which slides up and down in a cylinder. • It is connected with small end of the connecting rod through gudgeon pin. • Piston moves due to action of hot gases and heat energy is converted into mechanical energy. • Piston rings are provided to prevent leakage of hot gases around the piston. • Generally made up of aluminium alloys.
Cam shaft • Movement of valve are regulated by the means of cams which are fitted on the shaft which is known as cam-shaft • Its driven by the crank shaft through pair of timing gears or a chain • Cam shaft rotates half the speed of the crank shaft. • The cam also carries a gear or cam which drives the distributor an oil pump • Made of steel forging.
Crank Shaft • I runs under the action of piaton through connecting rod and crank pin located between crank webs and transmit work from piston to driving end. • It converts reciprocating motion into rotatory motion. • It also drives other accessories like oil pump, water pump, dynamos, distributor units etc. • Made up of steel forging usually.
Connecting rod • This connects piston on one side through piston pin through crank pin. • It forms the main link for converting reciprocating motion of piston into rotatory motion of crank shaft. • Made up of steel forging
Valve gear mechanism • Combination of components that control the admission of fresh charge into cylinder and discharge of exhaust gases from cylinder is known as valve gear mechanism. • Mechanism consists of camshaft, cam, follower, pushrod, rocket arm, spring n’ valve • Inlet or suction valve controls the admission of fresh charges whereas the exhaust valve controls the admission of fresh charge whereas exhaust valce controls the discharge of exhaust gases • Valves are closed against the force from the compression springs. • They are made from nickel or chromium steel.
Spark Plug • Spark Plug is a device, inserted into the combustion chamber for firing an electrical spark to ignite air-fuel mixture
Flywheel • It is a heavy disc of wheel type part which is fitted on the crank shaft. • It takes care of the fluctuations of the cyclic variations in speed by storing energy during power stroke and releasing it during other strokes
Cylinder Head • It closes one end of the cylinder and often contains valve through it………….
That’s all thank you !! • Presented for The GTU examination submission • By Group 1 Sawan Makwana , Prashanth Nair, Jigar Chauhan, Saumil Joshi n’ Harshil Gohel