Dailmer smoking exhaust The first part of the piston downstrokeOther cycles
The very first internal combustion engines did not compress the mixture. The first part of the piston downstroke drew in a fuel-air mixture, then the inlet val
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oil for Dailmer Some SI engines are crankcase scavengedCrankcase scavenged
Diagram of a crankcase scavenged 2-stroke engine in operation
Some SI engines are crankcase scavenged and do not use poppet valves. Instead the crankcase and t
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