The State Key Laboratory of Mechanical Transmission，Chongqing University，Chongqing 400044，China；China National NGV Engineering Technology Research Center, China Automotive Engineering Research Institute，Chongqing 400039，China 在期刊界中查找 在百度中查找 在本站中查找
China National NGV Engineering Technology Research Center, China Automotive Engineering Research Institute，Chongqing 400039，China 在期刊界中查找 在百度中查找 在本站中查找
China National NGV Engineering Technology Research Center, China Automotive Engineering Research Institute，Chongqing 400039，China 在期刊界中查找 在百度中查找 在本站中查找
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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.
