潍柴动力股份有限公司，山东 潍坊 261061
Abstract：Aiming at the premature aging of diesel engine oil during the performance development process, the test and combustion simulation analysis are carried out to find out the cause of premature aging of the engine oil. The result shows that the abnormal falling position of oil droplet increases the carbon content in oil and causes the large particles to exceed the limit, which is the cause of oil premature aging. By increasing the compression ratio of diesel engine and decreasing the angle of fuel spray, it is found that the abnormal falling point of fuel spray and the particles in the fuel spray are greatly reduced,the problem of oil aging is solved.
Keywords:diesel engine; oil aging; combustion optimization