![]() ![]() This is also called flushing because the combustion residual gas will be rinsed / released by a new gas that is ready to be compressed.Īfter the piston rise BDC, the piston will move back to the TDC and compressed the AFM. The residual combustion gas in the combustion chamber will be pushed out by AFM THAT entering through the transfer port. ![]() This will make the air and gasoline mixture in the crankcase move to the transfer port and enter the combustion chamber. In this case, both the transfer channel and exhaust port are open because the intake channel is covered by a piston wall that moves to the BDC. When the piston move down, there is transfer process where the AFM inside the crank case will push by piston downward movement. The result of this combustion is an expansion energy and combustion residual gas, the expansion energy will push the piston to move downward. So that when the spark plug turns on, the AFM automatically burn. This process begins when the spark plug sparking fire, on the end of previous step the piston position is on top which compresses the AFM. Downward strokes or piston moving down step is the movement of the piston from TDC to BDC.
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