中文摘要：

针对车用发动机瞬态工况多的特点,应用模糊控制策略,对采用柴油/甲醇组合燃烧发动机在瞬态工况下的甲醇控制量实施控制.依据此控制策略,开发了一套柴油/甲醇电控系统.该系统的甲醇喷射量由台架试验标定得到控制脉谱数据,将其应用于一台只达到国Ⅱ排放标准的增压中冷发动机上进行国Ⅲ标准的ELR试验,能使柴油/甲醇发动机满足国Ⅲ标准的ELR试验烟度要求.在一辆装配了柴油/甲醇组合燃烧发动机的城市中巴车上进行了道路试验,结果表明,模糊控制策略能有效增大甲醇替代柴油比例,显著改善组合燃烧发动机在瞬态工况烟度排放,而且能提高燃料的经济性和加速响应.

英文摘要：

In view of the transient conditions faced by bus engines,fuzzy control strategy was applied to the control of methanol spray quantity of diesel/methanol compound combustion（DMCC） engine under transient conditions.According to the fuzzy control strategy,a set of diesel/methanol electronic control system was developed in which the control spectrum of methanol spray quantity was obtained through base test calibration.European load response（ELR） test was conducted on a DMCC engine turbocharged with intercooler controlled by the fuzzy strategy according to the National Standards of China（GB3847—2005） and test results show the DMCC engine can meet the smoke requirement of ELR test according to GB3847—2005.Road test was carried out on a city bus equipped with DMCC engine,results of which indicate that the fuzzy control strategy can increase the substitution rate of diesel oil with methanol effectively,reduce the smoke exhaust of DMCC engine under transient conditions significantly and improve the economy and acceleration response of the fuel.