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THE FOUR STROKE GASOLINE ENGINE, INTAKE STROKE, COMPRESSION STROKE,…
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COMPRESSION STROKE
The valves are closed; the piston go to the TDC and compress the air-fuel mixture increasing the chamber temperature.
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POWER STROKE
Here is produced the power by the explosion caused by the electrical spark. The gases expansion make the piston move down.
Most of the today engines are composed more than one cylinder in order to increase speed and smoothness