电控单体泵系统的喷射控制算法  

Injection control algorithm for an electronic unit-pump

作　　者：李进[1] 张科勋[1] 李建秋[1] 杨福源[1] 欧阳明高[1] 

机构地区：[1]清华大学汽车工程系汽车安全与节能国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2005年第11期1526-1529,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九七三"重点基础研究项目(2001CB209205)

摘　　要：为了精确控制电控单体泵的喷油过程,结合嘴端压力变化规律,对影响喷射过程的电磁阀响应时间、喷油器开启压力等进行了分析。以此为基础建立了喷射控制时序,并分析了喷射过程中各个时间量与角度量之间的关系。采用相邻循环法与自适应参数调整相结合的方法对喷射区间的曲轴瞬时转速进行了预估,完成了喷射控制中的时间/角度转换。整机试验表明,所设计的喷射控制算法能很好地满足精确喷油控制的要求。Nozzle pressure variations during the mold injection process and the main factors affecting the injection process such as the solenoid response lag and the injector opening pressure were studied to develop a method to precisely control unit pump injection rates. The relationships between the temporal quantities and the angle were analyzed with the time to angle conversion based on the momentary transient speed, which was estimated using adiacent cycle recursion and sell-adapting parameter methods. Experiments on an engine test bench show that the injection control algorithm provides precise fuel injection control.

关 键 词：喷射 电控 单体泵 柴油机 

分 类 号：U27[机械工程—车辆工程]