ECU Research Of Simulation Diesel Engine Based On ARM

As the step of modernization become more and more fast and increasingly serious pollution of environment,considering with sustainable development of human,government throughout the world continuously drew up more rigorous emission legislation. The diesel engine is energy plant which consumes energy and emissions combustion product,it emphasize great influence to environment. Electronic controlled engine is born for easing the degree of pollution of environment.Based on the control principle of electronic control system, a total design scheme of the electronic control system for CR diesel engines has been made out. The hardware of electronic control unit (ECU) for CR engines is designed and developed. Samsung's S3C44B0X micro controller unit is used as the electronic control unit. The sensors and actuators are also selectedIn this paper,on the basis of the electronic control theory, the stable control strategy of injection quantity, injection timing and rail pressure have been designed after designing of system's control project. The injection quantity and the injection timing are controlled on the basis of the MAP, and the rail pressure is mainly controlled by using PID of closed loop. Finally, the whole control system adopts the control strategy based on the injection quantity. According to various conditions of the diesel engine, detailed control strategy achieves the steady rail pressure, precise injection quantity and injection timing,as well as the performance of rapid starting and stable running.According to the idea of hierarchical and modular design,the development of controlled software is divided into four functional modules, including initialization module,signal acquiring module,driver module,serial communication module and so on. All above modules are independent,but interrelated to each other, and they can achieve the control objects of electronic control system together. Finally, the paper analyses the structure of uClinux and introduces how to port uCLinux to the platform.