汽油/CNG两用燃料发动机控制系统开发  

Development of control system for a CNG/gasoline bi-fuel engine

作　　者：葛晓成[1,2] 徐中明[1] 李静波[2] 邹博文[2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]中国汽车工程研究院国家燃气汽车工程技术研究中心,重庆400039

出　　处：《重庆大学学报（自然科学版）》2014年第8期19-24,共6页Journal of Chongqing University

基　　金：国家863高技术资助项目(2012AA111718)

摘　　要：使用CNG(compressed natural gas)为主燃料汽油为辅助燃料的CNG/汽油两用燃料汽车具有良好的经济性和排放性能,传统的在用车改装采用主从式双ECU(electronic control unit)系统,性能不佳。通过对发动机燃烧和排放理论研究,开发了面向OEM(original equipment manufacture)的单ECU多点顺序喷射的汽油/CNG两用燃料控制方案。设计了λ非对称振荡PI控制算法等天然气特有的控制策略,并进行了发动机台架性能和整车排放试验。结果表明:两用燃料发动机采用单ECU控制时的性能优于采用主从式双ECU系统,且排放低于国Ⅳ限值。The CNG/gasoline bi-fuel vehicle using CNG as the primary fuel and gasoline as a secondary has good economy and emission performance,but the traditional bi-fuel engine uses master/slave dual ECU system cannot realize it.For improving the performance,the research with multi-point sequential injection based on single ECU which is designed for OEM is made.The CNG special control strategies are designed such as Lambda PI control logic of Non-symmetric oscillation,and also the experimental investigation for this bi-fuel engine and the emission test of vehicle are carried out.According to the experiment results,the performance of engine with single ECU is better than the engine with master/slave dual ECU,and the value of emission is less than euro IV emission levels when we use CNG fuel.

关 键 词：汽油/CNG两用燃料汽车 控制策略 发动机性能 排放特性 试验研究 

分 类 号：U469.7[机械工程—车辆工程]