The Design Of High-power Diesel Engine Electronic Fuel Injection System

The design of software and hardware of Engine Control Unit( ECU) given in this paper is based on the research of the principles,characteristics,the latest theories and developing trend in the domestic and overseas researching fields of engine electronic control technologies, the author proposes a new way to design the ECU which combines the 32 bit MCU(TMS320F2812) and MMB the platform of software exploiture.In order to improve the speed,stability,data-processing ability of ECU,the TMS320F2812 is adopted to meet the function requirements of ECU. On the base of this idea, the schematic diagram and PCB is designed, including system circuit,front channels circuit,back channels circuit,RS-232 serial communication circuit .To ensure it can work correctly in the wicked environment full of high temperature, vibration and strong eradiation of electromagnetism, several anti-jamming measures are introduced.Based on the platform of MMB, the application software of ECU and driver of A /D and SCI is designed. The modularized design makes the engineering, industrialization software design method standardized, provides a clear and reliable standard of software interface, a more real-time,stable,flexible and open ECU system is built. Furthermore, the locally upgrade mechanism is implemented which makes it easy to maintain and update the system, and prolong its life-cycle at the same time.