VVT对发动机性能影响的研究  

An Investigation on the Influence of VVT on Engine Performance

作　　者：李林斌 关力 尹建东 沈源 王瑞平 

机构地区：[1]宁波吉利罗佑发动机零部件有限公司,浙江宁波315000 [2]浙江吉利罗佑发动机有限公司

出　　处：《小型内燃机与车辆技术》2017年第4期14-18,30,共6页Small Internal Combustion Engine and Vehicle Technique

摘　　要：VVT(可变气门正时)是汽油机上普遍采用的一项技术,VVT的应用对发动机性能提升明显。一般来讲VVT可以有效提升发动机的低速转矩,降低发动机排放,减小发动机泵气损失,提高有效热效率,提高发动机功率。另外对于增压直喷汽油机而言,利用VVT还可以实现扫气功能,有效降低发动机低速大负荷早燃和爆震倾向,提升涡轮增压器响应。结合台架试验研究了VVT对发动机燃烧特性、有效热效率及排放的影响,试验结果表明VVT对发动机的各项性能提升明显。VVT is a common technology used on gasoline engine. Commonly the application of VVT has an obviously improvement on engine performance. Generally, using of VVT can improve engine low end torque,reduce emission, reduce pumping loss, improve thermal efficiency, and increase engine power. Especially for GDI it can make the scavenging realized to decrease knocking and preignition tendency, and improve the response of turbo charger. This paper investigates VVT influence on engine combustion characteristic,thermal efficiency and emission. The experimental results show that it has obviously effect on the improvement of engine performance.

关 键 词：VVT 热效率 排放 爆震 

分 类 号：TK411.3[动力工程及工程热物理—动力机械及工程]