摘要
将一款汽油机改造成氢燃料发动机,主要是改装了燃料供给系统,加装了电子节气门等部件,并设计了氢燃料发动机电控单元的硬件和软件。对怠速工况下回火现象的生成机理进行理论分析,研究了氢燃料发动机怠速控制策略。用增量式PID控制算法进行怠速稳定性研究,确定其比例系数、积分系数以及控制周期,得到最佳的PID控制参数,实现怠速的稳定控制。通过大量的怠速试验,优化了各种控制参数,包括电子节气门开度、点火提前角、点火闭合角、氢气喷气正时等,达到优化控制的目标。
A gasoline engine is refitted into a hydrogen-fueled engine. The refitting mainly covers the modification of fuel delivery system, adding necessary components like electronic throttle and designing the hardware and software of electronic control unit for hydrogen-fueled engine. The mechanism of backfire in idle condition is theoretically analyzed and the idle control strategy is studied. The incremental PID algorithm is used to study the idle stability with its proportional and integral coefficients and control cycle determined, then the optimal PID control parameters are obtained, and idle stability control is realized. Finally through a large number of idle tests, all control parameters, including the opening of electronic throttle, ignition advance angle, ignition dwell time and hydrogen injection timing are optimized and the objective of optimization control is achieved.
出处
《汽车工程》
EI
CSCD
北大核心
2009年第9期824-828,823,共6页
Automotive Engineering
基金
江苏省普通高校博士研究生创新工程项目(CX07B_073z)资助
