Effects of EGR on Performance and Emission of Light-Duty Diesel Engine at Different Altitudes

WANG Jun; SHEN Lizhong; BI Yuhua; LEI Jilin

doi:10.3969/j.issn.1001-2222.2022.06.006

Vehicle Engine ›› 2022, Vol. 0 ›› Issue (6) : 35-40. DOI: 10.3969/j.issn.1001-2222.2022.06.006

Effects of EGR on Performance and Emission of Light-Duty Diesel Engine at Different Altitudes

WANG Jun¹,SHEN Lizhong²,BI Yuhua²,LEI Jilin²

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Abstract

In order to further study the operating characteristics of diesel engine using exhaust recirculation(EGR) technology in plateau environment, the effects of EGR on performance and emission of a lightduty vehicle diesel engine at different altitudes (0 m, 1 000 m, 1 960 m) were experimentally investigated by using an altitude simulation device. The results showed that the tolerance of EGR rate in plateau area was weaker than that in plain area. With the increase of EGR rate, the engine power performance decreased and the economy deteriorated. Compared with the economy, EGR had a more significant impact on power performance in plateau area. EGR could effectively reduce NO_xemissions at different altitudes. With the increase of EGR rate, both the brake specific CO emission and smoke increased at different altitudes and were more sensitive to EGR.

Key words

diesel engine / plateau climate simulation test / exhaust gas recirculation / performance / emission

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WANG Jun,SHEN Lizhong,BI Yuhua,LEI Jilin. Effects of EGR on Performance and Emission of Light-Duty Diesel Engine at Different Altitudes[J]. Vehicle Engine. 2022, 0(6): 35-40 https://doi.org/10.3969/j.issn.1001-2222.2022.06.006