In order to achieve better comprehensive performance which further reduces the nitrogen oxides(NOx)emission of diesel engine while maintain fuel efficiency and soot emission, a system that combines variable nozzle turbo and Venturi-exhaust gas recirculation(VNT+vEGR)is designed. For a wastegate(WG)original turbocharged diesel engine, the design of Venturi-exhaust gas recirculation(vEGR)system and the matching of variable nozzle turbo(VNT)system are conducted. And the study of simulation on the brake specific fuel consumption(BSFC), NOx and Soot emission is carried out. The VNT-vEGR system is optimized by design of experiment(DoE)multi-objective optimization method. The results indicate that compared with the original WG diesel engine, ESC weighted value of fuel consumption of optimized VNT-vEGR system basically remain unchanged, and weighted value of NOx emission decrease by 49.5%. It can be concluded that the diesel engine have achieved good comprehensive performance.
NI Jimin
,
GAO Xunan
,
SHI Xiuyong
,
CHEN Hong
,
LIU Si
. Study on the Development of Diesel Engine VNT-vEGR System Based on Multi-objective Optimization[J]. Journal of Mechanical Engineering, 2016
, 52(2)
: 108
-115
.
DOI: 10.3901/JME.2016.02.108
[1] 姚春德，周红秀. 柴油机加速过程快速补气的电动增压器设计及其特性[J]. 机械工程学报，2006，42(6)：184-187. YAO Chunde，ZHOU Hongxiu. Design and characteristics on electric supercharger for diesel engine acceleration by additional air rapid injection[J]. Chinese Journal of Mechanical Engineering，2006，42(6)：184-187.
[2] 于超，肖建华，王建昕，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，WANG Jianxin，et al. The influence of EGR rate on the emission characteristics of heavy-duty diesel engine fueled with biodiesel[J]. Automotive Engineering，2008，30(10)：871-874.
[3] 秦大同，隗寒冰，段志辉，等. 重度混合动力汽车油耗和排放多目标实时最优控制[J]. 机械工程学报，2012，48(6)：83-89. QIN Datong，WEI Hanbing，DUAN Zhihui，et al. Multiple-objective real-time optimum control strategy for fuel consumption and emission of full hybrid electric vehicle[J]. Journal of Mechanical Engineering，2012，48(6)：83-89.
[4] 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.
[5] 颜文胜，申立中，郑伟，等. 文丘利管在增压中冷柴油机EGR系统中的应用[J]. 农业机械学报，2006，37(6)：5-8. YAN Wensheng，SHEN Lizhong，ZHENG Wei，et al. Study on Venturi pipe used in EGR system of turbocharger inter-cooled diesel[J]. Transactions of the Chinese Society for Agricultural Machinery，2006，37(6)：5-8.
[6] 陈泓，倪计民，叶年业，等. 计算机辅助工程技术在废气再循环系统开发中的应用研究[J]. 机械工程学报，2012，48(22)：155-161. CHEN Hong，NI Jimin，YE Nianye，et al. Computer aided engineering applications in exhaust gas recirculation system development process[J]. Journal of Mechanical Engineering，2012，48(22)：155-161.
[7] 杨策，马朝臣，沈宏继. 大型柴油机可变几何涡轮增压器的研制及试验研究[J]. 内燃机学报，2002，20(6)：551-554. YANG Ce，MA Chaochen，SHEN Hongji. The design and experimental investigation about a variable geometry turbocharger of heavy duty diesel engine[J]. Transactions of CSICE，2002，20(6)：551-554.
[8] Van NIEUWATADT M J，KOLMANOVSKY I V，MORAAL P E. Coordinated EGR-VNT control for diesel engines：An experimental comparison[R]. SAE，2000-01-0266，2000.
[9] WIJETUNGE R S，HAWLEY J G，VAUGHAN N D. Application of alternative EGR and VGT strategies to a diesel engine[R]. SAE，2004-01-0899，2004.
[10] WAHLSTROM J, ERIKSSON L, NIELSEN L. Controller tuning based on transient selection and optimization for a diesel engine with EGR and VGT[R]. SAE，2008-01-0985，2008.
[11] 倪计民，杜倩颖，周英杰，等. DoE在高压共轨柴油机优化设计中的应用[J]. 内燃机学报，2009(3)：231-236. NI Jimin，DU Qianying，ZHOU Yingjie. Application of DoE in common rail diesel engine optimization design[J]. Transactions of CSICE，2009(3)：231-236.
