The first stroke is called the intake stroke the first stroke in the four stroke engine. In the intake stroke, the piston moves downward, drawing a renewed charge of vaporized fuel/air mixture. Basically filling the combustion chamber by pulling in the air and fuel mixture. The intake event occurs when the …show more content…
The upward stroke of the piston forces the exhausted fuel out of the cylinder. The exhaust stroke lets out the gases (just like a kid who has just passed gas) from the combustion chamber and let out into the air destroying the environment. The exhaust stroke is the last stroke and happens when the exhaust valve is open and the intake valve is closed. Piston movement moves out and the exhaust gases into the air. As the piston reaches the bottom dead center during the combustion stroke the combustion is finished and the cylinder is full with the exhaust gases. The exhaust valve then opens, and the flywheel and all the other moving parts moves the piston back to top dead center. All of the moving exhaust gases goes out through the open exhaust valve. At the end of the exhaust stroke, the piston is at top dead center and one operating cycle has been completed.
Ultimately, the four stroke engine basically has 4 stages which are intake, compression, combustion, exhaust. It basically sums up a combustion engine which is a mixture that is drawn into the cylinder on the first stroke and then is compressed when it is ignited on the second stroke. The work on it is done on the third stroke and the air and fuel mixture of combustion are released through the exhaust valve on the fourth stroke. All of the four stroke function collectively together to help the engine work efficiently as