| 单词 | crankcase compression |
| 释义 | crankcase compression in Automotive Engineering (kræŋkkeɪs kəmprɛʃən) noun (Automotive engineering: Vehicle components, Engine, transmission, and exhaust) crankcase, compression , compression 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. 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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