基于FPGA的高压共轨柴油机判缸与喷油HIL系统研究

Study on Phase Determination and Fuel Injection HIL System for FPGA Based High Pressure Common Rail Diesel Engines

根据发动机判缸所需的曲轴、凸轮轴信号特性,采用LabVIEW图形化系统设计方法,构建了一种基于现场可编程门阵列(field-programmable gate array,FPGA)技术的用于高压共轨柴油机判缸与喷油研究的硬件在环系统。针对一款自主开发的高压共轨柴油机电子控制单元(ECU)和英飞凌TC1728单片机,分别加载使用ASCET开发的底层判缸控制策略和使用C语言开发的底层判缸驱动程序,进行了硬件在环试验。针对一款自主开发的高压共轨柴油机喷油硬件驱动板,通过参数化控制PWM进行了喷油器硬件在环试验。试验结果表明:基于FPGA的硬件在环系统,只需提供基本配置参数即可产生通用的曲轴、凸轮轴传感器同步信号,满足发动机瞬态运行特性的判缸与喷油研究需要。根据喷油器的响应,可得到PWM喷油器控制信号的最优参数,满足国Ⅳ及以上排放法规限值发动机电控开发需要。

According to the requirements of the characteristics of crankshaft and camshaft signals, a hardware-in-loop FPGA-based system was established using the LabVIEW graphical system design approach for the study of phase determination and fuel injection of high pressure common rail diesel engine. The hardware-in-loop test was performed on a high pressure common rail diesel engine with a self-developed ECU and Infineon TC1728 microcontroller, which were loaded with the control strategies developed by ASCET and the drivers developed by C language respectively. Furthermore, a hardware-in-loop test of injector was performed on a self-developed high-pressure common rail diesel injector hardware driver board by the PWM control method. The results show that： provided with the basic configuration parameters, the FPGA-based HIL systems can generate a common crankshaft, camshaft sensor synchronization signals, to meet the needs of phase determination research of engine transient operating characteristics. According to the injector response, the optimal parameters for the PWM injector control signals can be obtained to develop the engine electronic control system for China stage IV emission regulation.