五气门汽油机气道内二次燃油喷射技术的研究  

A Study on the In-Port Twice Fuel Injection Mode in a 5-Valve S. I. Engine

作　　者：裴普成[1] 刘书亮[2] 范永健[2] 

机构地区：[1]浙江大学能源系,杭州310027 [2]天津大学内燃机燃烧学国家重点实验室

出　　处：《内燃机学报》2000年第1期53-56,共4页Transactions of Csice

基　　金：国家自然科学基金!(59676029);天津大学内燃机燃烧学国家重点实验室开放基金;中国博士后科学基金

摘　　要：在汽油机低压供油的前提下，提出了“气道内二次燃油喷射”的概念，用于优化缸内混合气的分布， 消除传统单次喷油分层燃烧所存在的弊端。在发动机的一个工作循环内，第１次喷射的燃油在缸内形成 均质稀混合气，第２次喷射的燃油将火花塞周围适当加浓。在自行设计的五气门汽油机上所进行的初步 试验证明：与普通稀燃单次喷油方式相比，这种新喷油方式能够提高发动机稀燃能力２个空燃比单位， 具有显著降低燃油消耗的作用。Under the condition of low pressure in-port injection in S. I. engines,the concept of 'In-Port Twice Fuel Injection' is proposed for the purpose of realizing optimal incylinder charge stratification and avoiding the main shortages caused by the conventional charge stratificaition of injection engines. In every work cycle,the first injection offers the fuel to form a lean homogeneous mixture in the whole cylinder,and the second injection to produce a rich mixture near the spark plug. Some fundamental experiments are carried out on a 5-valve S. I. engine CA1102Q modified by ourselves. The results prove that this novel fuel injection mode can extend the engine' s lean burn ability larger by 2 unit of air-fuel ratio than the popular fuel injection mode for lean combustion,and reduce the fuel consumption remarkably.

关 键 词：五气门汽油机 稀燃 燃油喷射 二次喷油 车用 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程] U464.171[机械工程—车辆工程]