johnson_united t1_iwg5bhs wrote

Reply to comment by mkillham in How an engine works. by ooMEAToo

Intake - piston travels down to pull in air/fuel mix; compression - piston travels up to compress mix; power - mixture ignites, forcing piston down; exhaust - piston travels up to force out exhaust; process starts over.

Exhaust cycle for the valve timing seems a little bit off, but it’s close.