Because the engine is running continuously, the high-pressure mixture in the cylinder will enter the crankcase through the gap between the piston ring and the cylinder, so that there are trace substances such as gasoline and water vapor in the crankcase besides air and engine oil. In order to prevent these substances from affecting the quality and lubrication effect of engine oil, a device is needed to separate engine oil from other substances.
Extended data:
Oil-gas separator can keep good lubricating performance of engine oil and prolong its service life. When the engine is working, a part of high temperature and high pressure gas leaks into the crankcase through the piston ring. After diesel vapor and water vapor condense, the engine oil will be diluted and its performance will deteriorate, and bubbles will form in the engine oil, which will destroy the normal supply of engine oil. This phenomenon is especially serious in winter when the engine is cold. After installing the oil-gas separator, the above substances can be separated in time.
When the engine is working, the temperature in the crankcase rises and the gas expands. The high-temperature and high-pressure gas escaping into the crankcase increases the pressure in the crankcase, so that the oil will leak from all the joint surfaces and oil seals. At the same time, the increase of the pressure in the crankcase will increase the resistance of the piston when it goes down, increase the expansion work and the power loss of the intake stroke, and reduce the output power of the engine. After installing the oil-gas separator, the high-temperature and high-pressure gas in the crankcase can be discharged to balance the pressure inside and outside the crankcase.
Many Improvements/Higher Reliability Analysis of People's Network-the Third Generation EA8883