Crankcase ventilation system

Abstract

The invention provides a crankcase ventilation system which comprises an engine body, an intake manifold, an oil and gas separating system, a pressure control valve and an oil loop. The intake manifold and the oil and gas separating system are connected with the engine body separately, the pressure control valve is connected with the oil and gas separating system, and the oil and gas separating system is connected with the engine body through an oil loop; the crankcase ventilation system further comprises a first crank ventilation access, a second crank ventilation access and a gas supplementing access, the first crank ventilation access is a gas access under the small-load working condition, and the two ends of the first crank ventilation access are connected with the pressure control valve and the intake manifold respectively; the second crank ventilation access is connected with the first crank ventilation access in parallel and is a gas access under the large-load working condition, and the two ends of the second crank ventilation access are connected with a booster front pipeline and the pressure control valve respectively; the two ends of the gas supplementing access are connected with an air filter rear pipeline and the engine body respectively. The crankcase ventilation system can solve the problems that engine oil is diluted and engine oil is emulsified.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a crankcase ventilation system capable of improving the problems of engine oil dilution and engine oil emulsification. Background technique [0002] When the engine is running, there is always a very small amount of combustible mixture leaking into the crankcase. The gasoline vapor leaked into the crankcase will dilute the engine oil after condensation, making the oil viscosity smaller; the water vapor in the exhaust gas will condense in the lubricating oil to form foam, destroying the supply of lubricating oil; the water vapor and acidic substances in the exhaust gas will corrode the parts , And make the performance of lubricating oil worse. At the same time, the gas leaking into the crankcase will increase the pressure and temperature in the crankcase, which will cause the oil to leak from the oil seal and gasket. For this reason, existing motor adopts closed crankcase ve...

AI Technical Summary

Problems solved by technology

[0004] Icing of the crankcase ventilation system may cause blockage of the pipes, resulting in excessive internal pressure of the crankcase ventilation system, damage to the seals and leakage problems

Oil emulsification will affect the lubrication of moving parts, resulting in shaft holding, pulling, and damage to the engine

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