摘要
机油稀释现象是汽油发动机常见的质量问题,随着增压直喷技术的引入,机油稀释问题的趋势更加严重。机油稀释会导致机油运动粘度的明显下降,破坏机油的使用性能,严重时会破坏运动部件的油膜建立,造成发动机整体可靠性的降低。以一台3.0L增压直喷汽油机为例,在台架试验过程中,通过对比分析计算油耗与实测油耗的关系,可以确定不同标定策略下机油稀释的整体趋势,从而确定该工况下最优的标定策略,为优化不同工况下机油稀释问题找到了一条快速而准确的途径。
Oil dilution is a common problem of gasoline engine, this phenomenon will get worse along with the developing of GDI technology. Oil dilution could lead to the decrease of oil′s dynamic viscosity, which will break the oil film between moving parts. In this paper, a 3.0L TGDI engine has been investigated. During the engine test, the difference between the calculated fuel rate and the real fuel rate could show the trend of oil dilution when different calibration strategies are used. This method will shorten the product development cycle and save the R＆amp;D cost.
出处
《小型内燃机与车辆技术》
2015年第1期17-20,共4页
Small Internal Combustion Engine and Vehicle Technique
关键词
机油稀释
喷油策略
油耗比
Oil dilution
Injection strategies
DFR
