Snufflepuffster

Snufflepuffster t1_iwe3wrq wrote

Reply to comment by evilleppy87 in How an engine works. by ooMEAToo

often valves close or open early to take advantage of acoustics (shock waves) to ram air into the cylinder or throw it out. So timing is very nuanced and can be adjusted drastically from engine to engine. In general the exhaust valve isn’t going to match the stroke, it might be early or late, extended or short due to design.

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