Effects of VGT/EGR on emissions from diesel engine

被引：0

作者：

Lou D. ^{[1
]}

Guo S. ^{[1
,2
]}

Tan P. ^{[1
]}

Hu Z. ^{[1
]}

机构：

[1] School of Automotive Studies, Tongji University, Shanghai

[2] United Automotive Electronic Systems Co., Ltd., Shanghai

来源：

Tongji Daxue Xuebao/Journal of Tongji University | 2016年 / 44卷 / 12期

关键词：

Emission characteristics; Exhaust gas recirculation; Heavy duty diesel engine; Variable geometry turbine;

D O I：

10.11908/j.issn.0253-374x.2016.12.018

中图分类号：

学科分类号：

摘要：

The effects of variable geometry turbine (VGT)/exhaust gas recirculation (EGR) on pressure ratio, air-fuel ratio, specific fuel consumption, and emissions of NOx, CO, HC, CO2 and smoke from a heavy duty diesel engine have been investigated. The results show that pressure ratio and air-fuel ratio decrease, and fuel economy deteriorates with the increase of the opening of the EGR valve. NOx emission can be strongly affected by the opening of the EGR valve and VGT valve. NOx emission can be greatly reduced by increasing the opening of the EGR valve and VGT valve, and there is good logarithmic relationship between decline of volume concentration of NOx and the opening of EGR valve. However, HC, CO, CO2 and smoke emissions are increased. In order to lower NOx emission, while effectively controlling fuel economy and smoke emission, 50% of the opening of the EGR valve combined with 45% of the opening of the VGT valve is suitable at medium load, and 75% of the opening of the EGR valve combined with 55% of the opening of the VGT valve is suitable at high load. © 2016, Editorial Department of Journal of Tongji University. All right reserved.

引用

页码：1931 / 1937

页数：6

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