4 Stroke Engine
Stroke= Stroke is the distance between BDC and TDC. the piston moves from BDC to TDC is called 1 stroke. while in 4 stroke engine, the piston moves 4 times up and down, is called 4 Stroke engine.
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| PISTON |
TDC = Top Dead Centre
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| 4 stroke engine |
1st Stroke
Suction Stroke.
inlet valve = Open
Oulet valve = Close
Piston moves = Down
Fuel+ Air = Entering due to suction
Compression Stroke.
Inlet Valve = Close
Output Valve = Close
Piston Moves = Up
Mixture ( Fuel + Air )= Ignite due to compression in Diesel, and by spark in petrol
3rd stroke
Power Stroke. ( Master stroke )
Inlet Valve = Close
Output Valve = Close
Piston moves = Downward due to the high pressure and high temperature
Power = Developed
4th Stroke
Exhaust Stroke.
Inlet Valve = Close
Outlet Valve = Open
Piston Moves = Up
Burnt gases = Out
