Important terms used in IC engine:
Stroke is the distance covered by the piston between the top dead centre(TDC) and bottom dead centre(BDC) in an IC engine.
Bore is the inner diameter of the cylinder.
Mean Piston Speed
It is the average speed of the piston during one revolution in an IC engine.
= (Piston distance in one revolution)(Rate of the crankshaft rotation)
Where n=no of revolution per sec
Low mean piston speed – 4.5 to 7m/sec
Medium mean piston speed – 7 to 10m/sec
High mean piston speed – 10 to 15m/sec
Bottom Dead Centre(BDC)
It is the point at which the piston of an engine is lowest and nearest to the axis of the crankshaft during a stroke.
Top Dead Centre(TDC)
It is the point at which the piston of an engine is at top during a stroke.
It is the ratio of the volume of the cylinder when the piston is at BDC and at TDC. The higher the ratio, the higher is the power output.
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