Engine oil-gas separation device and engine

Abstract

The invention discloses an engine oil-gas separation device and an engine, comprising an isolation plate connected to the crankshaft chamber, the isolation plate isolates an oil-gas separation chamber from the crankcase, a labyrinth channel is arranged in the oil-gas separation chamber, and the oil-gas The separation chamber is also provided with an air inlet connected to the inlet end of the labyrinth channel and an exhaust port connected to the exhaust end of the labyrinth channel, and the air inlet is located at the bottom of the oil-gas separation chamber. The arrangement of the labyrinth channel can increase the contact or collision area of ​​the gas flow path of the oil-air mixture, so as to facilitate the condensation of liquid substances. The air inlet is not only the import port of the oil-gas mixture, but also the return port of the condensed liquid substance after the oil-gas mixture is separated, which reduces the number of return ports opened in the oil-gas separation chamber and reduces the time-divided path of the oil-gas mixture flowing in the oil-gas separation chamber. Risk of returning to the crankcase through the return port.

Description

technical field [0001] The invention relates to the field of engines, in particular to an engine oil and gas separation device and an engine. Background technique [0002] Existing two-wheel and three-wheel gasoline engines have the following technical disadvantages: a piston reciprocating engine, due to the reciprocating motion of the piston and the characteristics of a small amount of blow-by gas at the piston, its crankcase must be designed with an engine breathing system (or oil-gas separation system), the purpose of which is Separating the oil-air mixture discharged from the crankcase, allowing the lubricating oil to condense and return, extending the service life of the lubricating oil. When the engine is working, a part of the high temperature and high pressure gas leaks into the crankcase through the piston ring. If this part of the gas is not discharged in time, the lubricating oil will be thinned and the performance will be deteriorated. After installing the oil an...

AI Technical Summary

Problems solved by technology

The general design principle of the oil-gas separation labyrinth is to design a labyrinth structure on the discharge path of the oil-gas (lubricating oil and gas) mixture to increase the contact or collision area between the oil-gas mixture and the labyrinth path, so that the lubricating oil can condense and flow back; but the mixed flow of the labyrinth design The flow direction and condensate return flow interfere with each other inside the labyrinth, which is not conducive to the return flow of condensate lubricating oil

Images