单燃料LPG多点喷射柴油机的热负荷控制  

Thermal Load Control for a Multi-point Injection LPG Engine Modified from Diesel Engine

作　　者：高莹[1] 于秀敏[1] 李君[1] 王立君[1] 卓松芳[2] 覃军[2] 

机构地区：[1]吉林大学汽车工程学院,吉林长春130025 [2]广西玉柴机器股份有限公司,广西玉林537005

出　　处：《吉林大学学报（工学版）》2002年第3期1-5,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点科技攻关资助项目 (99 A0 4 0 2 0 2 0 8)

摘　　要：在原柴油机的基础上 ,采用进气道多点电控顺序喷射单一气体LPG闭环控制并加装三效催化器系统 ,通过多项试验得到了改造后发动机的热负荷变化规律 ,并有效地降低了热负荷。在ECU严格控制过量空气系数的情况下 ,使改造后的燃气发动机的动力性、经济性以及排放性等性能参数既满足预定目标 ,又能使其排放指标达到欧Ⅱ标准。Spark ignition a LPG engine with multi-point sequential fuel injection and three-way catalyzator was modified from a diesel engine.Thermal load behavior of the LPG engine was investigated on a engine test rig and improved effectively.When the air-fuel ratio of the engine is closed-loop controlled precisely,not only its power and fuel economy reach the target,but also its exhaust emissions meet the EURO Ⅱ limits.

关 键 词：单燃料LPG 热负荷 电控多点顺序喷射 柴油机 汽车发动机 

分 类 号：U464.174[机械工程—车辆工程]