可控自燃模式下负气门重叠策略与废气再吸入策略的对比分析

吉林大学学报(工学版) ›› 2011, Vol. 41 ›› Issue (增刊1): 47-52.

可控自燃模式下负气门重叠策略与废气再吸入策略的对比分析

李华¹, 程鹏¹, 谭满志¹, 谷艳华¹, 王会², 彭亚平³, 郭英男¹

1. 吉林大学汽车仿真与控制国家重点实验室, 长春 130022;
2. 北京工业职业技术学院, 北京 100042;
3. 联合汽车电子有限公司系统开发科, 上海 201206

收稿日期:2011-04-25 出版日期:2011-09-01 发布日期:2011-09-01
作者简介:李华(1982 ),男,博士研究生.研究方向:内燃机工作过程优化与控制.E-mail:lihua08@mails.jlu.edu.cn.
基金资助:
“973”国家重点基础研究发展规划项目(2007CB210004)

CAI combustion comparison between NVO strategy and EGRB strategy

LI Hua¹, CHENG Peng¹, TAN Man-zhi¹, GU Yan-hua¹, WANG Hui², PENG Ya-ping³, GUO Ying-nan¹

1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China;
2. Beijing Polytechnic College, Beijing 100042, China;
3. System and Function Development Technical Center, United Automotive Electronic Systems Co, Ltd, Shanghai 201206, China

Received:2011-04-25 Online:2011-09-01 Published:2011-09-01

摘要/Abstract

摘要：

应用自主开发的电控液压可变配气机构在一台经过改进的单缸发动机上实现了两种EGR策略下的可控自燃着火(CAI),并对两种策略下CAI燃烧的发动机运行参数以及燃烧特征参数进行了研究。研究结果表明:在相同转速1000r/min时,NVO策略下的CAI工作区域比EGRB策略下的工作区域宽广,相位可调整范围较大;EGRB策略下的最大平均有效压力略高于NVO策略;两种策略在整个CAI工作区域内,有效热效率较高,大部分区域内的效率超过了30%,而且NO_x排放水平极低;NVO策略下的燃烧始点较提前,燃烧持续期较短。

关键词: 动力机械工程, 可控自燃, 负气门重叠策略, 废气再吸入策略, 可变气门机构, 燃烧特性

Abstract:

On the basis of self-developed electro-hydraulic variable valve train,controlled auto-ignition(CAI)was achieved under two different EGR strategies on a modified single cylinder engine.Stable CAI operating ranges of these two valve timing scenarios were obtained by plotting tested operating points.Within the operating range,engine performances and combustion features were analyzed.The experimental results indicate that operating range of NVO strategy,allowing more substantial adjustment of valve phase,is wider than that of EGRB strategy at fixed engine speed of 1000 r/min.The maximum BMEP of EGRB strategy slightly exceeds the NVO strategy.Moreover,brake thermal efficiency exceeds 30% in most of these two operating range,higher than conventional engine,with an extremely low NO_x emission at the same time.Besides,start of combustion of CAI under NVO strategy is a little advanced and combustion duration is a little shorter compare with that of EGRB strategy.

Key words: power machinery and engineering, controlled auto-ignition, negative valve overlap, exhaust gas rebreathing, variable valve train, combustion feature

中图分类号:

TK421

李华, 程鹏, 谭满志, 谷艳华, 王会, 彭亚平, 郭英男. 可控自燃模式下负气门重叠策略与废气再吸入策略的对比分析[J]. 吉林大学学报(工学版), 2011, 41(增刊1): 47-52.

LI Hua, CHENG Peng, TAN Man-zhi, GU Yan-hua, WANG Hui, PENG Ya-ping, GUO Ying-nan. CAI combustion comparison between NVO strategy and EGRB strategy[J]. 吉林大学学报(工学版), 2011, 41(增刊1): 47-52.

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