(Automotive engineering: Vehicle components, Engine, transmission, and exhaust) Crankcase compression is the method of starting some smaller two-stroke engines, where the mixture charge is compressed in a sealed crankcase by the descending piston before passing to the combustion chamber. ▶ crankcase, compression1, compression2
⇒ In two-stroke cycle engines using crankcase compression, lubricating oil must be added to the inlet air. ⇒ The two-stroke cycle uses crankcase compression to pump the fresh charge into the cylinder. ⇒ In almost all two-stroke cycle engines, crankcase compression is used to force air into and scavenge the cylinders.
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