Effects of Oil Temperature on Lubrication System Performance for Multi-Cylinder Diesel Engine

GU Lei; DU Wei; SUN Yadong

doi:10.3969/j.issn.1001-2222.2021.04.005

Vehicle Engine ›› 2021, Vol. 0 ›› Issue (4) : 29. DOI: 10.3969/j.issn.1001-2222.2021.04.005

GU Lei¹，DU Wei¹，SUN Yadong²

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Abstract

A pressure test platform of lubrication system was built for a V-type multicylinder diesel engine. The oil pressure, engine resistance moment and mechanical power loss at the key nodes of lubrication system were measured in the range from 40 ℃ to 115 ℃ between 800 r/min and 2 200 r/min. The effects of oil temperature on the performance of engine lubrication system and mechanical loss were studied and the lubrication characteristics under extreme working conditions were predicted. The results show that the oil pressure at each key node of lubrication system and the oil pressure loss between each key node decrease with the increase of oil temperature at each speed. The flow resistance of oil radiator and its changing rate with temperature are the largest in the range of test temperature. The pressure drop of main oil passage on the right is larger than that on the left and the difference between them decreases with the increase of temperature. Both the mechanical power loss and the resistance moment decrease with the increase of oil temperature, and the changing rate of resistance moment increases with the increase of speed among the same temperature range.

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/ mso-hansi-font-family: 宋体">diesel engine；lubrication system；oil temperature；lubrication；mechanical loss

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GU Lei，DU Wei，SUN Yadong. Effects of Oil Temperature on Lubrication System Performance for Multi-Cylinder Diesel Engine[J]. Vehicle Engine. 2021, 0(4): 29 https://doi.org/10.3969/j.issn.1001-2222.2021.04.005