Gas-oil separation check valve of automobile crankcase

Abstract

The utility model provides a gas-oil separation check valve of an automobile crankcase and belongs to the technical field of automobiles. The check valve solves the problem that oil gas of an existing gas-oil separation check valve of the crankcase cannot flow into a gas inlet channel smoothly so that the problem of backflow of fresh mixed gas in a gas inlet pipe occurs when an engine has small load or does not work. The check valve comprises a valve body. A cavity, a gas inlet channel and a gas outlet channel are arranged in the valve body, and the gas inlet channel and the gas outlet channel are communicated with the cavity. A valve core is arranged in the cavity, is flat and can slide along an inner wall of the cavity. A spring is installed at one end of the valve core, one end of the spring acts on a spring seat fixed in the valve body, and the other end of the spring acts on the valve core to enable the valve core to seal the gas inlet channel. The gas-oil separation check valve enables the oil gas to smoothly flow into the gas inlet channel, and backflow of the fresh mixed gas in the gas inlet pipe is avoided when the engine has small load or does not work.

Description

technical field [0001] The invention belongs to the technical field of automobiles and relates to a one-way valve for separating oil and gas in an automobile crankcase. Background technique [0002] With the advancement of society and the rapid development of the automobile industry, people's living standards continue to improve, and automobiles have become one of the important means of transportation for people to travel. The engine is the heart of the car. The part used to install the crankshaft at the lower part of the engine block of the car is called the crankcase. The crankcase is divided into an upper crankcase and a lower crankcase. Used to store lubricating oil and seal the upper crankcase. [0003] When the engine is working, a part of the combustible mixture and exhaust gas will always escape into the crankcase through the piston ring, and the gasoline vapor condensed in the crankcase will make the engine oil thinner and the performance will deteriorate, and the ...

AI Technical Summary

Problems solved by technology

[0004] In the existing oil-gas separation system, the spool of the one-way valve generally does not move smoothly, so that the oil and gas cannot flow into the intake passage smoothly, resulting in the backflow of fresh mixed gas in the intake pipe when the engine is under low load or the engine is not working. Poor movement of the spool will also affect the ventilation of the crankcase. In the long run, the engine will work for a long time, which will lead to excessive pressure in the crankcase, which will easily cause air leakage and oil leakage at the joints, and the engine power will also increase accordingly. Affect the performance of the engine; and when the pressure of the oil and gas separated by the oil-gas separator is too high, it is easy to push the spool of the check valve too hard, block the air outlet channel of the check valve, and make the check valve lose the effect of ventilation

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