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| Study on Lube Oil Consumption Characteristics of High-Pressure Common-Rail Diesel Engine |
| DOI：10.13949/j.cnki.nrjgc.2021.02.014 |
| Key Words:diesel engine oil consumption variation law sulfur-tracing test |
| Author Name | Affiliation | | YANG Haixiang,LEI Jilin,WEN Jun,WEN Zhigao,SHEN Lizhong | 1.Faculty of Transportation and Engineering, Kunming University of Science and Technology, Kunming 650500, China
2.Chengdu Galaxy Power Co., Ltd., Chengdu 610505, China |
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| Abstract:Taking a high-pressure common-rail diesel engine as the research object, the lube oil consumption was measured by the sulfur-tracing method, and a dynamic simulation model of piston assembly was established by testing the temperature field of the piston and cylinder liner to calculate the variation laws of lube oil consumption with engine speed and load. Four main channels of lube oil consumption in the cylinder were analyzed. Results show that the lube oil evaporated from cylinder liner wall and thrown off from piston top ring accounts for a large proportion of total lube oil consumption, reaching 61.42%~70.56% and 29.42%~38.42%, respectively. As observed, the bench test basically verifies the results of the simulation calculation. With the rise of engine speed and load, the lube oil consumption first increases steadily, and then shows a rapid increase trend again after a slight decrease. |
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