A high pressure circulating exhaust gas re-circulation (EGR) intake system with Venturi tube is installed to study the influence of the intake system on the NOx emission in the condition of the economy and power of the diesel engine. According to a diesel engine’s basic structural parameters and test data, the diesel engine’s GT-Power 1D simulation model and the AVL Fire 3D simulation model of combustion chamber is established. Based on the calibration of models and the calculation of the diesel engine performance, the Venturi tube is introduced into the intake system and its structure parameters are designed. The 1D and 3D models of engine are applied for the calculation of the fuel economy and emission characteristic of the vEGR diesel engine, and the results are verified by experiments. The results show that the Verturi EGR system allows the diesel engine to achieve ideal EGR rates under different European steady state cycle(ESC) operating conditions, and the NOx emission could be reduced by 28.4% with no significant impact on the fuel economy. The calculated results consistent with the experimental results and the conclusions are real and effective. Venturi pipe intake system can achieve a more ideal high pressure EGR cycle, in the diesel engine ESC operating conditions(except idling mode) can achieve a more ideal EGR rate.
WANG Qiwei
,
NI Jimin
,
CHEN Hong
,
GU Shifan
,
SHI Xiuyong
,
SHEN Kai
. Study on the Effects of Venturi-EGR System on Turbo-charged Diesel Engine Performance[J]. Journal of Mechanical Engineering, 2016
, 52(4)
: 157
-164
.
DOI: 10.3901/JME.2016.04.157
[1] 朱瑞军, 王锡斌, 冉帆, 等. EGR和冷EGR对柴油机燃烧和排放的影响[J]. 西安交通大学学报, 2009, 43(9)：23-26.
ZHU Ruijun, WANG Xibin, RAN Fan, et al. Effects of EGR and cooled EGR on combustion and emission of a diesel engine[J]. Journal of Xi’an Jiaotong University, 2009, 43(9)：23-26.
[2] ROLF E. The influence of EGR on heat release rate and NO forma tion in a DI diesel engine[R]. SAE, 2001-01-1807, 2001.
[3] 于超, 肖建华, 帅石金, 等. EGR率对燃用生物柴油的重型柴油机排放特性影响[J]. 汽车工程, 2008, 30(10)： 871-874.
YU Chao, XIAO Jianhua, SHUAI Shijin, et al. Effect of EGR rate on the emission characteristics of heavy duty diesel engine fueled with Biodiesel[J]. Automobile Engineering, 2008, 30(10)：871-874.
[4] 杨帅, 李秀元, 张振东, 等. EGR率对柴油机排放特性影响的试验[J]. 农业机械学报, 2006, 37(5)：29-33.
YANG Shuai, LI Xiuyuan, ZHANG Zhendong, et al. Effect of EGR rate on the emission characteristics of diesel engine[J]. Journal of Agricultural Machinery, 2006, 37(5)：29-33.
[5] ULF L, GUDMUND S, PER S L. A comparison between different EGR systems for HD diesel engines and their effect on performance, fuel consumption and emissions. [R]. SAE , 2000-01-0226, 2000.
[6] BAERT R S G , BECKMAN E, VEEN A. Efficient EGR technology for future HD diesel engine emission targets [R]. SAE,1999-01-0837,1999.
[7] TOMAZIC D, PFEIFER A. Cooled EGR：An option or a must[R]. SAE, 2002-01-0962, 2002.
[8] WANG Qiwei, NI Jimin. Gasoline engine turbocharger matching based on vehicle performance requirements[R]. SAE,2015-01-1283, 2015.
[9] 陈宏. 车用柴油机VNT-vEGR系统的开发研究和性能优化[D]. 上海：同济大学, 2014．
CHEN Hong. Development research and performance optimization of VNT-vEGR system for vehicle diesel engine[D]. Shanghai：Tongji University, 2014.
[10] 吴君华, 黄震, 王天灵, 等. 用于增压柴油机EGR系统的文丘里管的试验研究[J]. 车用发动机, 2004, 151(3)：41-44.
WU Junhua, HUANG Zhen, WANG Tianling, et al. Experimental study on Venturi tube of EGR system for turbocharged diesel engine[J]. Vehicle Engine, 2004, 151(3)：41-44.
[11] 陈友强, 田维. 涡轮增压柴油机EGR系统设计[J]. 西华大学学报, 2011, 30(6)：1-4.
CHEN Youqiang, TIAN Wei. Design of EGR system for turbocharged diesel engine[J]. Journal of Xihua University, 2011, 30(6)：1-4.
[12] 邓永辉. 文丘里管式排气再循环系统在涡轮增压柴油机上的应用研究[C]//重庆汽车工程学会2008学术年会论文集,重庆,2008：164-168.
DENG Yonghui. Study on the application of Venturi tube type exhaust gas recirculation system in the turbocharged diesel engine[C]// Chongqing Automotive Engineering Society 2008 Academic Annual Meeting, Chongqing, 2008：164-168.
[13] 丁立, 陈泓, 石秀勇, 等. 涡轮增压柴油机EGR系统匹配与计算[C]//上海市汽车工程学会2012学术年会论文集,上海,2012：1-5.
DING Li, CHEN Hong, SHI Xiuyong, et al. Matching and calculation of the EGR system of the turbocharged diesel engine[C]//2012 academic annual meeting of the Institute of Automotive Engineering, Shanghai, 2012：1-5.
[14] 蒋德明, 陈长佑, 杨嘉林, 等. 高等车用内燃机原理[M]. 西安：西安交通大学出版社, 2006.
JIANG Deming, CHEN Changyou, YANG Jialin, et al. The principle of higher vehicle internal combustion engine[M]. Xi’an：Xi’an Jiaotong University press, 2006.
[15] 吕兴才. 燃料设计控制发动机燃烧与排放的试验研究[D]. 上海：上海交通大学, 2005.
LÜ Xingcai. Experimental study on combustion and emission of fuel design control engine[D]. Shanghai：Shanghai Jiao Tong University, 2005.
[16] 陈泓, 倪计民, 叶年业, 等. 计算机辅助工程技术在废弃再循环系统开发中的应用研究[J]. 机械工程学报, 2012, 22(22)：155-161.
CHEN Hong, NI Jimin, YE Nianye, et al. Application of computer aided engineering technology in the development of waste recycling system [J]. Journal of Mechanical Engineering, 2012, 22(22)：155-161.
