How an engine works.zebrawithnostripes t1_iwg5co5 wrote
Reply to comment by mkillham in How an engine works. by ooMEAToo
Blue valve opens, gas gets injected, piston is pushed back up, gas compresses, spark, boom. Red valve opens and smoke exists. Note how the piston does 4 up/downs in a cycle. Only 1 of those steps is powered by gas dirextly. The 3 other steps are powered by the movement of another piston.
The real beauty in there is the cam shaft IMO. The green things moving the valve. They have to be perfectly configured andnthe gear ration needs to be precise otherwise the valve wouldn't open at the right time.
This is not my expertise though ... I could be wrong
Wayed96 t1_iwgckmt wrote
>Blue valve opens, gas gets injected, piston is pushed back up, gas compresses, spark, boom
"Gas" is not injected. Air is sucked in because the piston moves down. Fuel could be injected either directly or just before the blue valve.
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