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| 排气道EGR策略对CAI燃烧过程影响的模拟研究 | |
| 引用本文： | 谷艳华,刘爽,刘发发,陈增强,郭英男.排气道EGR策略对CAI燃烧过程影响的模拟研究[J].车用发动机,2009(3). |
| 作者姓名： | 谷艳华 刘爽 刘发发 陈增强 郭英男 |
| 作者单位： | 1. 吉林大学机械科学与工程学院,吉林,长春,130022;吉林大学汽车工程学院,吉林,长春,130022 2. 吉林大学汽车工程学院,吉林,长春,130022 3. 一汽丰田,长春,发动机有限公司,吉林,长春,130022 |
| 基金项目： | 国家重点基础研究发展规划(973计划) |
| 摘 要： | 通过一维流体动力学软件GT-Power与化学动力学软件CHEMKIN联合模拟发动机循环,建立乙醇燃料排气道EGR模型,研究了发动机CAI燃烧的控制因素。分析了排气道EGR策略中的排气门晚关、进气门晚开和进气门开启时刻与排气门关闭时刻同时变化3种配气定时方案对EGR率的影响。由模拟计算可知排气道EGR策略对发动机缸内的换气过程、燃烧过程有强烈的影响。模拟结果表明:随着排气门逐渐晚关,EGR率增大,进气门关闭时刻缸内温度升高;进气门晚开策略中,EGR率受进气回流的影响较大;排气门晚关、进气门晚开同时变化策略扩大了CAI燃烧的EGR率范围;适当的EGR率有利于CAI燃烧的实现,EGR率过低或过高将导致失火和爆震,在不同的转速下EGR率的分布也不相同。 |
| 关 键 词： | 乙醇 可控自燃 配气定时 排气道 废气再循环 数值模拟 |
Simulation for the Influence of Exhaust Duct EGR on CAI Combustion |
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| GU Yan-hua,LIU Shuang,LIU Fa-fa,CHEN Zeng-qiang,GUO Ying-nan.Simulation for the Influence of Exhaust Duct EGR on CAI Combustion[J].Vehicle Engine,2009(3). | |
| Authors: | GU Yan-hua LIU Shuang LIU Fa-fa CHEN Zeng-qiang GUO Ying-nan |
| Institution: | GU Yan-hua1,2,LIU Shuang2,LIU Fa-fa2,CHEN Zeng-qiang3,GUO Ying-nan2(1.Mechanical Science , Engineering College,JiLin University,Changchun 130022,China,2.College of Automobile Engineering,3.FAW TOYOTA(Changchun) Engine Co.Ltd.,China) |
| Abstract: | With the GT-Power one-dimensional fluid dynamics software and CHEMKIN chemical kinetics software,the engine test cycle was simulated,the exhaust duct EGR model based on ethanol fuel was built and the control factors of CAI combustion were researched.The influences of exhaust valve late closing,intake valve late opening and the simultaneous variations of intake valve opening moment and exhaust valve closing moment on EGR rate were analyzed.By the numerical simulation,the in-cylinder gas exchange and combusti... |
| Keywords: | ethanol controlled auto-ignition(CAI) valve timing exhaust duct EGR numerical simulation |
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