Stroke one the piston is travelling down from TDC to BDC and the Intake valve is open allowing the fuel and air mixture to enter the combustion chamber and the Exhaust valve is closed.
Stroke two the Intake valve closes and the piston travels to TDC compressing the fuel ready for combustion/ignition.
Stroke three the Intake and exhaust valves are both closed. The spark plug ignites the gasses and pushes the piston back down to BDC.
Stroke four the exhaust valve opens and the piston travels up to expell the burnt gasses.
Cycle starts again.
Nikolaus August Otto invented the 4 stroke in 1862
What is the purpose of the crankshaft,camshaft,vavles collects(keepers),vavle sterm seals,head gasket,pistons,piston rings name them all, cambelt,flywheel?
What is the bore and stroke.
Bore is the diameter of the cylinder.
Stroke is the distance from Top Dead Centre to Bottom Dead Centre
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