摘要
电控单体泵由电控泵喷嘴发展而来,由于在电控泵与喷油器之间加入了高压油管,使电控单元从发出喷油信号到燃油喷入气缸的时间延迟加长。针对该特点,考虑程序计算时间、电磁阀响应特性等因素对喷油正时的影响,设计了凸轮信号盘、曲轴信号盘与发动机气缸的相位关系及判缸方式,确立了喷油正时控制策略。试验结果表明,发动机判缸速度快,且电控单元可按喷油正时控制策略准确、柔性地控制喷油正时和喷油量。优化喷油正时脉谱后,电控单体泵柴油机在欧洲十三稳态循环工况测试ESC下达到了欧-Ⅲ排放标准,同时也保持了与原机相近的动力性能。
Electronic unit pump originates from electronic pump injector system. Since an additional high pressure fuel pipe is added between the unit pump and the injector, the period from injection pulse signal sent by ECU to the beginning of fuel injection increases. In consideration of the effect of computation period of control strategy, response speed of solenoid valve and hydraulic delay on injection timing, the phase relation between cam and crank signal panel and engine cylinder, as well as the measure of cylinder detection were determined, and then the injection timing control strategy was determined. The experiments show that the ECU can accurately and flexibly control injection timing and injected fuel amount according to the injection timing control strategy. After the optimization of injection timing map, the EUP diesel engine can reach the Euro-Ⅲ emission standard under the European stationary cycle （ESC） without significant reduction of power performance.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2008年第3期6-11,共6页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
柴油机
电控单体泵
燃油喷射
控制方法
IC engine
diesel engine
electronic unit pump
fuel injection
control algorithm
