Crankcase ventilation system and gas engine

Abstract

The invention provides a crankcase ventilation system and a gas engine and relates to the technical field of oil gas treatment of crankcases of gas engines. The crankcase ventilation system comprisesan oil gas separator, a gas return pipe, a balancing pipe, an oil return pipe, a pressure adjusting valve, an internal-combustion engine, a crankcase and a ventilation pipe, wherein the crankcase communicates to the oil gas separator through the ventilation pipe and an oil and gas mixture can be introduced into the oil gas separator; an oil gas separator box communicates to the crankcase through the oil return pipe, and separated oil can be introduced into the oil gas separator; the oil gas separator box communicates to the internal-combustion engine through the gas return pipe, and separatedmixed gas can be introduced into the internal-combustion engine; the pressure regulating valve is connected to the gas return pipe in series, the crankcase communicates to an upper cavity of a membrane of the pressure regulating valve through the balancing pipe, and the flow of the mixed gas introduced into the crankcase through the gas return pipe can be adjusted. The system alleviates the technical problems that the crankcase ventilation system in the prior art is large in oil consumption, emission is deteriorated, and the pressure of the crankcase cannot be controlled effectively while filtering the gas.

Description

technical field [0001] The invention relates to the technical field of gas engine crankcase oil and gas treatment, in particular to a crankcase ventilation system and a gas engine. Background technique [0002] During operation of the internal combustion engine, combustion gases can leak between the cylinders and the corresponding piston rings and enter the crankcase of the internal combustion engine. Leakage gases usually include CO, NOX, nitrogen and hydrogen compounds, unburned fuel, oil mist and water vapour. Most of these gases are hazardous and need to be dealt with by the crankcase ventilation system. [0003] The crankcase ventilation system or device currently used in the market generally filters gas through a simple oil-gas separator. This kind of crankcase ventilation system or device has poor filtering accuracy for oil and gas, and cannot separate the oil and gas discharged from the crankcase well. mixture, and its filtered gas discharge port is directly discha...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a crankcase ventilation system and a gas engine, so as to alleviate the technical problems that the crankcase ventilation system in the prior art has a large loss of oil, worsened emissions, and can not effectively control the crankcase pressure while filtering gas

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