共轨电控单元新型升压及电流闭环控制电路设计  

New Design of Boost and Closed-loop Controlledon Electric Control Unit for Common Rail System

作　　者：丁珏[1] 曾伟[1] 沈妍[1] 周维[1] 

机构地区：[1]中国一汽无锡油泵油嘴研究所,江苏无锡214063

出　　处：《现代车用动力》2012年第1期47-50,共4页Modern Vehicle Power

摘　　要：分析了现有高压共轨电控单元的电路结构,针对原有的电路模块进行优化,设计出一种新型的升压电路和峰值电流闭环控制电路,电路由单片机(MCU)的脉宽调制(PWM)模块来作为升压电路的核心,取代原有的集成升压芯片,产生高压并驱动执行器,由MCU的A/D模块取代原有的离散电路,进行峰值电流闭环控制,使执行器尖峰电流一致,新型电路性能优异,硬件成本明显降低。Analyze the circuit of Electric Control Unitfor High-Pressure Common Rail System,the original circuit modules is optimized,and a new circuit of boost and closed-loop controlled is designed,improved by the microcontroller PWM circuit module as the core of the boost circuit,to replace the integrated chip,produce high pressure and drive the injector.By the microcontroller A/D module to replace the discrete circuit,for the peak current closed-loop control,to fit the peak current of the injector.The new circuit performance is excellent,hardware cost is decreased obviously.

关 键 词：电控单元 升压 电流闭环控制 PID算法 

分 类 号：TK423.8[动力工程及工程热物理—动力机械及工程]