探究多次喷油对汽油机性能的影响  

Investigation on the Effects of Multiple Fuel Injection for Gasoline Engine Performance

作　　者：马玺[1,2] 刘义佳 袁军亮 关松[1,2] 王文杰[1,2] 贺礼[1,2] 孟飞[1,2] 

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》2015年第3期23-27,共5页Small Internal Combustion Engine and Vehicle Technique

摘　　要：对汽油发动机而言,喷油参数和点火性能对发动机动力性、经济性、排放具有较大影响。喷油参数直接影响可燃混合气的形成以及在缸内的分布,和点火相配合决定着缸内的燃烧情况。发动机在低速大负荷工况易发生爆燃,通过多次喷油形成整体化学计量空燃比的分层混合气,改善燃烧降低爆燃倾向并提高燃油经济性。论述了采用多次喷油时喷油时刻、喷油持续期以及点火性能对于直喷汽油机经济性、排放性能、爆震的影响。For gasoline engine, fuel injection and ignition parameters have a great influence for engine performance, fuel economy and emission performance. Fuel injection parameters directly affect the formation and distribution of the fuel in the cylinder, and decide the combustion in cylinder with ignition. Engine is liable to deflagration in the condition of low speed and heavy load. The layered mixture stoichiometric air-fuel ratio can improve combustion, reduce lower deflagration tendency and improve fuel economy through multiple injection. This paper discusses the effects of the multiple fuel injection, the fuel injection time, injection duration and ignition performance on fuel economy, emission performance and detonation for direct injection gasoline engine.

关 键 词：汽油机 直喷 多次喷油 性能 

分 类 号：TK413.84[动力工程及工程热物理—动力机械及工程]