低压冷却EGR系统对汽油发动机燃油经济性及排放影响的研究  

Research on the Influence of Low Pressure Cooled EGR on the Gasoline Engine Fuel Economy and Emissions

作　　者：张鹏[1,2] 曹思雨 郑洪磊 常进才 屈伟[1,2] 高定伟 Zhang Peng;Cao Siyu;Zheng Honglei;Chang Jincai;Qu Wei;Gao Dingwei(R&D Center,Great Wall Co.,Ltd.,Baoding,Hebei,071000,China;Automobile Engineer Technical Center of Hebei Province)

机构地区：[1]长城汽车股份有限公司技术中心,河北保定071000 [2]河北省汽车工程技术研究中心

出　　处：《小型内燃机与车辆技术》2019年第6期6-9,92,共5页Small Internal Combustion Engine and Vehicle Technique

摘　　要：研究低压冷却EGR(以下简称:LP-EGR)系统对汽油发动机的影响,以一台2.0L增压直喷汽油发动机为研究对象,匹配LP-EGR系统,通过试验研究了不同EGR率对发动机特定工况平均有效燃油消耗率、缸内燃烧过程及主要排放物的影响机理和变化规律。研究表明,LP-EGR系统是降低汽油发动机燃油消耗和改善发动机排放的有效措施。Taking one 2.0 L TGDI engine with LP-EGR system as the research object,the influence of low pressure EGR(LP-EGR)system on gasoline engine is studied.Through testing,the influence mechanism of different EGR rates on the BSFC of specific operating condition,in-cylinder combustion process and main emissions are studied.Research shows that LP-EGR system is an efficient way to reduce gasoline engine fuel consumption and to improve engine emission.

关 键 词：汽油机 EGR率 平均有效燃油消耗率 燃烧持续期 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]