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为了对柴油机电控蓄压式喷油系统的共轨燃油压力进行准确、实时的控制,满足喷油量和喷油压力柔性控制的需要,采用电液比例溢流阀作为共轨燃油压力调节器,从而实现对共轨燃油压力电子控制;基于MC68HC11系列单片机,设计并应用了共轨燃油压力模糊PID控制器,从而实现对共轨燃油压力的闭环控制.试验结果表明:采用电液比例溢流阀和模糊PID控制器后,可使共轨燃油压力的实际值更接近于理想值,并且减小了共轨燃油压力的波动量.
In order to accurately and real-time control the common rail fuel pressure of the diesel-electric accumulator fuel injection system to meet the requirements of fuel injection quantity and flexible control of fuel injection pressure, an electro-hydraulic proportional relief valve is adopted as a common rail fuel pressure regulator , So as to achieve the electronic control of common rail fuel pressure.According to MC68HC11 series single chip microcomputer, a common rail fuel pressure fuzzy PID controller is designed and applied to realize the closed-loop control of the common rail fuel pressure.The experimental results show that the electro-hydraulic proportional overflow Valve and fuzzy PID controller, the actual value of the common rail fuel pressure can be brought closer to the ideal value and the fluctuation amount of the common rail fuel pressure can be reduced.