Influence of Pre-Injection and Post-Injection Parameters on Diesel Engine Emission

YIN Laicheng; QIU Shuang; MA Ning; YU Zehao

doi:10.3969/j.issn.1001-2222.2021.03.013

Vehicle Engine ›› 2021, Vol. 0 ›› Issue (3) : 76-81. DOI: 10.3969/j.issn.1001-2222.2021.03.013

Influence of Pre-Injection and Post-Injection Parameters on Diesel Engine Emission

YIN Laicheng¹，QIU Shuang¹，MA Ning²，YU Zehao¹

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Abstract

In order to explore the influence of pre-injection and post-injection on harmful substances in diesel engine exhaust gas, a bench test of high-pressure common rail diesel engine was conducted under different injection parameters to test the content of harmful substances. The test results show that the pre-injection can effectively suppress the generation of NO_x in the exhaust gas, but will lead to the increase of soot. Both NO_x and soot show a decrease trend after introducing the post-injection. With the increase of post-injection volume, the soot in the exhaust gas shows a trend of first decrease and then increase, and NO_x has no obvious law of change. According to the test data, the optimal emission point of YN33 engine was determined under various operating conditions, at which the content of various harmful substances can reduce.

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diesel engine / pre-injection / post-injection / emission

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YIN Laicheng，QIU Shuang，MA Ning，YU Zehao. Influence of Pre-Injection and Post-Injection Parameters on Diesel Engine Emission[J]. Vehicle Engine. 2021, 0(3): 76-81 https://doi.org/10.3969/j.issn.1001-2222.2021.03.013