汽油%2fLPG两用燃料车用发动机电控系统研究.pdfVIP

摇 2009 中国汽车工程学会年会论文集 SAE鄄C2009P166 283 汽油/ LPG两用燃料车用发动机电控系统的研究 王学合 联合汽车电子有限公司 摇 摇 揖摘要铱摇 在对目前两用燃料车分析的基础上提出了自己的设计方案, 该方案在设计上既考虑到了先进性, 同时也兼顾 实用性和可行性, 降低开发成本和周期。 在原汽油多点顺序电喷系统的基础上增加了电控多点连续LPG 喷射系统。 两套控 制系统分别存储了两套点火提前角数据分别用于汽油和LPG, 针对LPG燃料高辛烷值的特点优化点火提前角, 解决了燃烧 LPG 时普遍存在的动力下降的问题。 通过对在不同点火提前角下发动机燃用汽油/ LPG 时的全负荷特性对比, 经优化点火提 前角后, 发动机燃用LPG 时的转矩和功率得到了较大恢复, 在所有转速下下降幅度控制在5%以内, 部分转速时甚至达到了 燃用汽油时的水平, 同时解决了发动机燃用LPG后排气温度升高的问题, 有利于保护三元催化转化器。 摇 摇 揖关键词铱摇 液化石油气摇 两用燃料摇 电控摇 动力性 Research of Gasoline/ LPG Bi鄄fuel Vehicle Engine Electronic Control System Wang Xuehe UnitedAutomotive Electronic System Co., Ltd. 摇 摇 Abstract: On the basis of analyzing the background of bi鄄fuel vehicle on the world, design this bi鄄fuel engine electronic control system, it considersnot onlythehightechnology, but alsothepracticability, todecreasecost andthedevelopmentperiod. it isacon鄄 tinuous multi鄄point electronic system tocontroltheLPGinjection, andatthe sametimekeeptheoriginal gasolineinjection system,and can communicatewith each other. The engine start alwaysusesthegasoline,and after can changeover to LPGsmoothly. Optimization the ignition timing mapping for LPG,from the enginefull load performance test result, the torque and power of the engine is increased comprisedwithusingtheoriginal ignition angle, andthepower lost isnot morethan5% inthewhole speedrange comprisedwith gaso鄄 line system, and even up to the same power and torque at some speed,and also decrease the exhaust temperature to protect the three way catalyst. 摇 摇 Key words: liquefied petroleum gas摇 bi鄄fuel摇 electronic control摇 power 同时全国各地诞生了大量的对在用车进行改装的公司, 但基 引摇 摇 言 本都停留在引进国外淘汰产品对现有车型进行改装或改造, 其技