The Research On Development Of Diesel Engine Speed Controller Based On HCS12

Along with energy scarce with environmental pollution question day by day stern, caused the people to diesel engine's efficiency, the harmful emissions, the reliability to propose a higher request, the traditional mechanism control was already unable to satisfy this kind of new request, was high as a result of the electrically controlled diesel engine's control precision, the speed of response was quick, the control policy was flexible, the compatible strong characteristic, the diesel engine turned into electrically controlled for the modern diesel engine technological development tendency, the velocity modulation technology research also more and more is valued people's as the diesel engine electric control key technologies, along with monolithic integrated circuit performance day-by-day enhancement, function day by day formidable, applies in the diesel engine velocity modulation system the high performance micro controller to become the diesel engine velocity modulation engineering researchMainstream.This design is take Freescale Corporation's 16 monolithic integrated circuit MC9S12DP256 microprocessor as a core, unifies the diesel engine velocity modulation system's performance, has carried on the velocity modulation system's hardware circuit schematic diagram and the PCB design, the multianalysis various part of schematic diagram's composition and involved chip characteristic. The set considered diesel engine electrically controlled characteristics and so on system multi-duties, timeliness, carried on system's software design in the Codewarrior integrated development environment, the union modern control theory PID control technology have carried on the exhaustive control policy design and the research to the system, has realized to overall system's order control and the management. This system also has the system upgrade function, causes the system to favor the maintenance and the renewal, lengthened system's use cycle.Finally tested the plan to entire electrically controlled unit's experiment to carry on the explanation. The experiment proved that system's software and hardware system satisfies the design requirements, has the good control function.