【摘要】 将一台CA4 88汽油机改造为电控可调涡轮增压天然气发动机。该发动机采用了电控多点燃气顺序喷射技术、电控高能点火技术、可调喷嘴涡轮增压技术及中冷技术。试验研究表明 ,采用可调喷嘴涡轮增压技术可提高发动机的进气量 ,优化增压器在全工况范围内与发动机的匹配 ,大幅度提高发动机的动力性与经济性。增压后天然气发动机的最大功率与原汽油机相当 ,低速转矩特性明显改善 ,同时发动机使用经济性也得到提高。更多还原

【Abstract】 A CA488 gasoline engine is modified into an electronically controlled CNG engine with variable geometry turbo-charger(VGT),inter-cooler,electronically controlled multi-point gas sequential injection and high-energy ignition.The experiment results show that VGT can increase the amount of intake charge.Optimizing the matching of the engine with turbocharger can improve power and economic performance of engine.The maximum power of the supercharged CNG engine is equivalent to that of the original gasoline engine,with certain improvement in low speed torque and fuel economy.更多还原