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 NOx in the exhaust gas, but will lead to the increase of soot. Both NOx 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 NOx 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.
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
.
DOI: 10.3969/j.issn.1001-2222.2021.03.013
