Two Stroke and Four Stroke Engine I Engine parts working Explain I Hindi I
Two Stroke and Four Stroke Engine I Engine parts working Explain I Hindi I #youtube #engineering
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Two Stroke petrol engine
Two-stroke gasoline engines are preferred when mechanical simplicity, light weight, and high power-to-weight ratio are design priorities. By mixing oil with fuel, they can operate in any orientation as the oil reservoir does not depend on gravity.
Two Stroke diesel Engine.
A two-stroke diesel engine is an internal combustion engine that uses compression ignition, with a two-stroke combustion cycle.
Four stroke Petrol Engine
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either direction. The four separate strokes are termed:
Intake: Also known as induction or suction. This stroke of the piston begins at top dead center (T.D.C.) and ends at bottom dead center (B.D.C.). In this stroke the intake valve must be in the open position while the piston pulls an air-fuel mixture into the cylinder by producing vacuum pressure into the cylinder through its downward motion. The piston is moving down as air is being sucked in by the downward motion against the piston.
Compression: This stroke begins at B.D.C, or just at the end of the suction stroke, and ends at T.D.C. In this stroke the piston compresses the air-fuel mixture in preparation for ignition during the power stroke (below). Both the intake and exhaust valves are closed during this stage.
Combustion: Also known as power or ignition. This is the start of the second revolution of the four stroke cycle. At this point the crankshaft has completed a full 360 degree revolution. While the piston is at T.D.C. (the end of the compression stroke) the compressed air-fuel mixture is ignited by a spark plug (in a gasoline engine) or by heat generated by high compression (diesel engines), forcefully returning the piston to B.D.C. This stroke produces mechanical work from the engine to turn the crankshaft.
Exhaust: Also known as outlet. During the exhaust stroke, the piston, once again, returns from B.D.C. to T.D.C. while the exhaust valve is open. This action expels the spent air-fuel mixture through the exhaust valve.
Four Stroke Diesel Engine
In the 4-stroke engines, there are dedicated strokes for exhaust, consumption, and power. The crossover or ratio for fuel to exhaust is significantly reduced for this reason. It helps in ensuring better fuel economy for the 4 stroke engines and is further aided by the use of direct injection system.
Component Of engine working.
C – crankshaft
E – exhaust camshaft
I – inlet camshaft
P – piston
R – connecting rod
S – spark plug
V – valves. red: exhaust, blue: intake.
W – cooling water jacket
gray structure – engine block