Development&Calibration Of Diesel Engine Control System

Compared to other power machinery, the obvious advantage of diesel engine interms of energy, which makes it widely used in many fields. The development ofeconomy, the increase in energy demand, so the extensive use of fossil fuels, but alsolet the human society is facing more and more serious environmental pollution. As thepower source of the heavy duty truck, to reduce emissions of pollution challenges arealso faced with the diesel engine. Automobile manufacturers strive to maketechnological innovation, the development of a strong impetus to the diesel engineemission control technology. China has been the implementation of heavy-duty dieselengine phase IV emission standards, emission standards stage V country also The dayis not too distant when carrying out. Only rely on the optimization of the combustionin cylinder, cannot make the diesel engine emissions meet the National IV emissionstandards limit requirements, the need to use the after treatment system, purificationof diesel engine exhaust, to meet stringent emission standards. Starting from theChina conditions, considering factors of fuel economy and emissions, the adaptabilityof the upgrade, for heavy duty diesel engines, SCR technology route will be is a goodchoice to achieve national IV/V emission standard phase.Control function of electronic control system of diesel engine is more and morepowerful, to increase the design complexity, system application difficulty bigger,difficult problems after sale maintenance is also very prominent. In the process ofsystem development, the need to introduce standardized management developmentprocess to the process control. The use of CMMI models in software engineering, asystem development, maintenance, and design management of electric control systemof norms, can improve the development ability, to ensure the quality of productdevelopment and maintenance quality. Project management method in softwaresystem development life cycle of electronic products, will be defined as the product concept, definition, development, testing and maintenance of five stages, thedevelopment process is divided into project management, research and developmentand the organization support three categories, and subdivided into16processes, eachprocess define the input, output and activity. Take the V development process,application platform concept planning of the system function, through thedevelopment of tools will be quality inspection and functional testing systemdevelopment together, speed up the development progress of electronic controlsystem.The electronic control system of diesel engine of the original has been unable tomeet the requirements of low emission diesel engine, in order to meet the functionalrequirements of the future regulations and market users growing, decided to develop anew generation of electronic control system of diesel engine. In the stage of systemdesign of electronic control system of diesel engine on the overall function, carries onthe demand analysis, the formulation of development goals, requirements to supportSCR and EGR+POC two emission technology route, can match a single pump andcommon rail fuel injection system, compatible with urea injection system several postprocessing manufacturer. On the hardware and software of control system and thesurrounding parts of the design, the design of the new control unit can meet the bodycarrying requirements, and the system performance is significantly improved, theelectric control system application platform concept, carry out modular design. Thefinal system is developed to meet the demand of low emission control system.Diesel engine electronic control system development on the bench and vehicleon the application of calibration, performance test results show that: the engineelectronic control system of diesel engines, the independent development of thecountry, to meet the requirements of VI regulations, and has a good economy. In thevehicle starting, idle speed, driving, cruise, assisted braking, engine protectionfunctions after calibration, the engine in the vehicle to meet the use requirements.