燃料喷射对缸内直喷LNG发动机性能影响的试验研究  

Influence of Fuel Injection on In-cylinder DI LNG Engine Performance

作　　者：刘海涛[1] 邹博文[2] 李静波[2] 罗福强[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013 [2]中国汽车工程研究院,重庆400039

出　　处：《车用发动机》2011年第1期27-29,共3页Vehicle Engine

基　　金：国家"八六三"项目(2006AA11A1B4)

摘　　要：将某4气门车用4缸汽油机改装成缸内直喷LNG发动机,分析了燃料的喷射正时对发动机性能的影响。结果表明:在中等转速范围内,气轨压力较高,喷射持续时间短;在低、高转速范围内,气轨压力较低,喷射持续时间长;在相同转速条件下,随着负荷的增加,气轨压力减小,喷射持续时间延长;在中等负荷范围内,发动机经济性较好。A 4-valve 4-cylinder vehicle gasoline engine was modified to a direct injection LNG engine.The influence of fuel injection timing on engine performance was analyzed.The results show that,at medium speed,the gas rail pressure is higher and the injection duration is shorter.At low and high speed,the gas rail pressure is lower and the injection duration is longer.At the same speed,the rail pressure decreases and the injection duration extends with the increase of load.At medium load,the engine economy is better.

关 键 词：天然气发动机 喷射脉宽 喷射正时 气轨压力 

分 类 号：TK432[动力工程及工程热物理—动力机械及工程]