车用大功率柴油机电控喷油系统的开发研究

以车用 6V1 5 0柴油机原有的机械控制喷油系统为基础 ,开发电控喷油系统 ,实现了对喷油量的电子控制。采用高速开关型数字电磁阀作为电液执行器的电液转换元件 ;采用 MC68HC1 1 E2单片机作为电控单元的核心 ;在喷油泵供油齿杆位置闭环控制的基础上 ,实现柴油机转速闭环控制 ;开发了实验监控系统 ,以满足电控喷油系统与柴油机匹配的需要。进行了电控喷油系统与6V1 5 0柴油机的匹配实验 ,取得了较好的效果

Study of development of the electronically controlled fuel injection system of heavy duty diesel engine for vehicle

On the basis of the former mechanically controlled fuel injection system of 6V150 diesel engine,the electronically controlled fuel injection system had been developed,then the electronic control of fuel injection quantity had been achieved. The high speed digital solenoid valve was used as the key component of the electro hydraulic actuator,the MC68HC11E2 single chip microprocessor was used as the kernel of the electronic control unit(ECU). On the basis of the close loop control of the position of the fuel feeding toothed rod of the fuel pump,the close loop control of the engine speed had been achieved.When the electronically controlled fuel injection system was matched with the 6V150 diesel engine, the monitoring and tune up system was developed to meet the demand of matching. The electronically controlled fuel injection system was matched with the 6V150 diesel engine, and the test result is satisfying.