01-12-2012, 05:28 PM
INTERNAL COMBUSTION ENGINE
INTERNAL COMBUSTION.pptx (Size: 162.14 KB / Downloads: 29)
POWER STROKE
The high pressure of the burnt gases forces the piston toward the BDC both the valve are close thus power is produced both pressure and temperature decreases during expansion
EXHAUST STROKE
The expansion stoke the exhaust valve open and the inlet valve remains close the piston start moving from the BDC to TDC, and sweep the burnt gases out from the cylider almost at atmospheric pressure.
ACTUAL VALVE TIMING OF FOUR STROKE PETROL
ENGINE :-
Valve timing is the regulation of the point in the cycle at which the
valve are set to open and close.
There are two factor :-
Mechanical factor
Dynamic factor