Engine oil-gas separation device and engine

Abstract

The invention discloses an engine oil-gas separation device and an engine. The engine oil-gas separation device comprises an isolation plate connected into a crankshaft chamber, the isolation plate isolates an oil-gas separation chamber from the inside of a crankcase, a labyrinth channel is formed in the oil-gas separation chamber, the oil-gas separation chamber is further provided with a gas inlet communicating with the gas inlet end of the labyrinth channel and a gas outlet communicating with the gas outlet end of the labyrinth channel, and the gas inlet is located in the bottom of the oil-gas separation chamber. According to the engine oil-gas separation device and the engine, the labyrinth channel is arranged so that the contact or collision area of a gas flow path of an oil-gas mixture can be increased, thereby facilitating the condensation of liquid substances; and the gas inlet is a leading-in opening of the oil-gas mixture, and meanwhile is also a backflow opening of the condensed liquid substances after the oil-gas mixture is separated, so that the backflow opening formed in the oil-gas separation chamber is omitted, and the risk that the oil-gas mixture returns to the crankcase through the backflow opening from paths when the oil-gas mixture flows in the oil-gas separation chamber is reduced.

Description

technical field [0001] The invention relates to the field of engines, in particular to an engine oil-gas separation device and an engine. Background technique [0002] Existing two-wheel, three-wheel gasoline engine has following technical shortcoming: piston reciprocating engine, because of the reciprocating motion of piston and a small amount of gas blow-by characteristics at piston place, its crankcase must be designed with engine breathing system (or oil-gas separation system), its purpose Separate the oil-air mixture discharged from the crankcase, let the lubricating oil condense and flow back, and prolong the service life of the lubricating oil. When the engine is working, part of the high-temperature and high-pressure gas leaks into the crankcase through the piston ring. If this part of the gas is not discharged in time, the lubricating oil will become thinner and the performance will deteriorate. After installing the oil-gas separation device, the above-mentioned sub...

AI Technical Summary

Problems solved by technology

The general design principle of the oil-gas separation labyrinth is to design a labyrinth structure on the discharge path of the oil-gas (lubricating oil and gas) mixture to increase the contact or collision area between the oil-gas mixture and the labyrinth path, so that the lubricating oil can condense and flow back; but the mixed flow of the labyrinth design The flow direction and condensate return flow interfere with each other inside the labyrinth, which is not conducive to the return flow of condensate lubricating oil

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