Closed crankcase ventilation system for engine and vehicle

Abstract

The invention provides a closed crankcase ventilation system for an engine and a vehicle. The closed crankcase ventilation system comprises an oil-gas separator and a negative pressure guiding device,wherein the oil-gas separator is used for separating high-temperature oil gas entering a crankcase after combustion in an engine cylinder or mixed oil gas after the high-temperature oil gas is mixedwith fresh air; and the negative pressure guiding device is connected with the air exhaust end of the oil-gas separator and the air intake end of an engine aftertreatment system, and is used for guiding exhaust gas after separation by the oil-gas separator to the engine aftertreatment system for reprocessing the exhaust gas with the engine aftertreatment system and discharging the reprocessed exhaust gas into air outside the vehicle. According to the scheme, the closed crankcase ventilation system can completely avoid the influence of the oil gas separated by an existing crankshaft ventilationsystem entering a gas intake system to the performance of the oil gas, and does not have too high requirements for the separation efficiency of the oil-gas separator.

Description

technical field [0001] The invention relates to the technical field of crankcase ventilation systems, in particular to a closed crankcase ventilation system for an engine and a vehicle. Background technique [0002] With the overall improvement of engine performance, fuel consumption and emission regulations are becoming more and more stringent. Therefore, each OEM pays more and more attention to the research of engine crankcase ventilation system, and it is more and more important to improve the efficiency and reliability of oil and gas separation. [0003] The principle of the closed crankcase ventilation system is that when the engine is working, part of the combustible mixture and exhaust gas enter the crankcase through the piston ring, and the crankcase ventilation system can separate the oil and gas that have entered the crankcase, and the separated engine oil Returning to the oil pan, the separated exhaust gas is continuously upgraded with the requirements of regulati...

AI Technical Summary

Problems solved by technology

[0006] One purpose of the present invention is to solve the technical problem of pollution of related components in the intake system caused by introducing the exhaust gas separated by the oil-gas separator into the intake system in the prior art

[0007] Another object of the present invention is to solve the technical problem in the prior art that the separation effect of the oil-gas separator is relatively high due to the need to introduce the exhaust gas separated by the oil-gas separator into the intake system

Images