Oil-gas separator

Abstract

The invention discloses an oil-gas separator and aims to provide the oil-gas separator which can reduce the operating pressure differential variation of a crankcase and the oil-gas separator to improve the oil-gas separating effect. The oil-gas separator comprises a separator housing, an oil-gas mixing channel arranged in the separator housing and an oil-gas inlet communicating with the oil-gas mixing channel and further comprises a negative pressure adjusting device arranged on the separator housing, wherein the negative pressure adjusting device comprises an air compensation cavity formed inthe separator housing, an air inlet communicating with the air compensation cavity, and an air compensation device arranged on the separator housing and used for compensating air for the oil-gas mixing channel; the air compensation device comprises a compensating through hole and an umbrella-type valve; the compensating through hole is formed in the separator housing and communicates with the oil-gas mixing channel and the air compensation cavity; and the umbrella-type valve is arranged on the inner side face of the oil-gas mixing channel and is used for controlling open-close of the compensating through hole.

Description

technical field [0001] The invention relates to the field of oil-gas separation, in particular to an oil-gas separator. Background technique [0002] The automotive oil-gas separator is mainly used to separate the oil from the oil-gas mixture in the crankcase. When the oil-gas mixture enters the oil-gas separator, the oil-gas separator separates the gas from the oil, and the separated oil flows back to the oil pan. [0003] During the working process of the crankcase, the working pressure in the crankcase is constantly changing. When the working pressure in the crankcase is negative pressure, and the negative pressure is too large, not only will the resistance increase when the piston moves, resulting in engine power loss. It will also cause a large change in the pressure difference during the working process of the oil-gas separator, which will affect the oil-gas separation effect of the oil-gas separator; [0004] Similarly, when the working pressure in the crankcase is ...

AI Technical Summary

Problems solved by technology

[0003] Since the working pressure in the crankcase changes continuously during the working process of the crankcase, when the working pressure in the crankcase is negative pressure, and if the negative pressure is too large, not only will the resistance increase when the piston moves, resulting in engine power loss, It will also cause a large change in the pressure difference during the working process of the oil-gas separator, which will affect the oil-gas separation effect of the oil-gas separator;

[0004] Similarly, when the working pressure in the crankcase is positive pressure, and the positive pressure is too large, the oil will seep from the crankshaft oil seal, crankcase liner, etc. At the same time, the pressure difference during the working process of the oil-gas separator will change greatly, which will affect the oil-gas separation effect of the oil-gas separator

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