摘要
根据发动机稀薄燃烧的要求,采用16位单片机MC9S12XDP512微控制器,利用其增强型输入捕捉输出比较定时器,自主开发出电控系统。采用稀燃、快燃(滚流)、推迟点火和二次喷油的可控燃烧方案,改变二次喷油比例和二次喷油时刻等参数,实现二次喷油过程的优化,在气流运动的作用下,实现了发动机稀薄燃烧复杂时序控制,明显改善燃烧过程。在稀薄燃烧发动机典型工况下,空燃比越大,二次喷油比例对燃油经济性的改善越明显。
Use 16 bit MCU MC9S12XDP512 to develop an electronic control unit of lean burn engine with its enhanced input capture and output compare timer. Combustion scheme is controllable with Lean Bum,quickly burn, spark advance reduced, Twice Fuel Injection. With optimized two injection fuel ratio and second injection time, we realize the complicated time sequence control of engine. The bigger AFR, the better control of fuel economy of twice fuel injection under typical status of lean burn engine.
出处
《天津汽车》
2007年第3期9-11,共3页
Tianjin AUTO
基金
国家高技术研究发展计划("八六三"计划)(2006AA11A198)
关键词
稀薄燃烧
电控系统
二次喷油
燃油经济性
Lean burn
Electronic control
Twice fuel injection
Fuel economy
