摘要
在一种新型柴油机电控燃油喷射系统中,高压喷射过程是基于角度的过程,而以单片机为核心的电磁阀控制是一个基于时间的过程。为了实现精确的喷射过程控制,必须利用喷油泵凸轮轴瞬时转速完成时间和角度转换。本文测量和分析了凸轮轴瞬时转速,并提出了两种瞬时转速预报方法,结合电磁阀关闭始点反馈,运用前后结构和硬件虚拟脉宽调制等技术,实现了喷射控制算法。通过设置喷射过程故障诊断监视器加强了喷射控制的安全性。最后通过台架试验验证了喷射控制算法的精度、可行性和可靠性。
In a new type of electronic diesel fuel injection system, the pulsed high pressure injection is an angle based process, while the microprocessor-based solenoid control is a time-based process. To realize the precise diesel injection control, advanced time/angle conversion must be performed by using the momentary speed of pump camshaft. In this paper, the signal of momentary speed of pump camshaft is measured and analyzed, two kinds of speed prediction methods are proposed and compared. Combining the method with solenoid valve closure point feedback technique, high precision, cylinder by cylinder injection control algorithm is developed. Based on analysis of the real-time structure for the time-based electronic control system, the event-driven synchronized injection control algorithm is implemented by using foreground/background structure, virtual hardware PWM and diagnostic monitor. Finally, the test results are presented which verify the control precision, feasibility and reliability.
出处
《汽车工程》
EI
CSCD
北大核心
1999年第1期37-43,共7页
Automotive Engineering
基金
国家自然科学基金
国家"九五"攻关项目
关键词
喷射控制
电控系统
柴油机
汽车
Injection control Electronic control system Diesel Engine
