Experimental Study on Separation Performance of Oil-Gas&nbsp;Separator for Vehicle
Diesel Engine

Vehicle Engine ›› 2025, Vol. 0 ›› Issue (4) : 10-14.

Experimental Study on Separation Performance of Oil-Gas Separator for Vehicle Diesel Engine

SUN Xiuxiu^1,²,ZHENG He1^,2,JING Guoxi^1,²,HU Maoshuang^1,2,YU Huichao^3,4,5,DONG Changlong^3,4,5

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Abstract

To evaluate the performance of active, compound, and labyrinth oil-gas separators, tests were conducted to measure pressure loss and separation efficiency. By establishing an oil-gas separator test platform, the pressure loss and separation efficiency characteristics for three types of separators were studied under different boundary conditions. The experimental results show that greater blow-by of oil-gas mixture result in higher pressure loss regardless of the separator type, and the active oil-gas separator has the lowest pressure loss. Additionally, the active oil-gas separator demonstrates the highest separation efficiency under different blowby, oil temperatures and gas pump pressures, and the labyrinth oil-gas separator has the lowest efficiency. At the speed of 12 000 r/min and the blow-by of 180 L/min, the separation efficiency of active, labyrinth and compound separator is 98.82%, 66.30% and 87.34% respectively. The separation efficiency of active oil-gas separator is less than 90% when the blow-by of oil-gas mixture is less than 100 L/min or the particle size of oil droplets is small. The findings provide valuable insights for the performance evaluation and optimization of oil-gas separator designs.

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oil-gas separator / separation efficiency / pressure loss

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SUN Xiuxiu, ZHENG He, JING Guoxi, HU Maoshuang, YU Huichao, DONG Changlong. Experimental Study on Separation Performance of Oil-Gas Separator for Vehicle Diesel Engine[J]. Vehicle Engine. 2025, 0(4): 10-14