Closed type circular breathing system and automobile

Abstract

The invention belongs to the technical field of vehicles and discloses a closed type circular breathing system and an automobile. The closed type circular breathing system comprises an engine, an oil-gas separator, a supercharger and a one-way valve; one end of the oil-gas separator communicates with a crankcase of the engine; the other end of the oil-gas separator communicates with an air inlet pipeline through an air outlet pipeline; the air inlet pipeline communicates with the supercharger; the supercharger communicates with the engine; the inlet end of a bypass pipeline communicates with the air outlet pipeline; the outlet end of the bypass pipeline communicates with the supercharger and the engine correspondingly; and the one-way valve is arranged on the bypass pipeline, and is configured to be selectively opened, so that gas separated by the oil-gas separator can return to the engine through the bypass pipeline for pressure relief of the crankcase. The closed type circular breathing system is simple and reliable in structure, the risk of engine damage caused by sudden increase of engine pressure is reduced, effective protection of the engine is realized, and the service lifeof the engine is prolonged.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a closed-circuit breathing system and an automobile. Background technique [0002] In the automobile industry, the breathing ventilation system of the engine is generally divided into a closed cycle breathing system and an open cycle breathing system. The closed cycle breathing system means that the oil and gas separated by the oil and gas separator are not directly discharged into the atmosphere, but Connect it to the intake line before the supercharger through the outlet line, and then re-enter the engine again. [0003] For an engine running in a cold region, if a closed-circuit breathing system is used, when it is restarted after a long-term stop, knots will often appear at the connection between the outlet pipe of the oil-gas separator and the inlet pipe of the supercharger. ice situation. Since the icing position is inside the pipeline, it is not easy to find. If it is s...

AI Technical Summary

Problems solved by technology

Since the icing position is inside the pipeline, it is not easy to find. If it is started directly, even at idling speed, the icing position will block the discharge of gas in the outlet pipeline of the oil-gas separator, causing the crankcase pressure of the engine to suddenly increase. Causes failures such as engine oil spraying from the oil filling port and ejection of the oil dipstick, which will damage the engine and shorten the service life of the engine

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