Structure Analysis And Optimization Design Of The Power-train Of Heavy-duty Vehicle

The paper summarizes the automotive power-train at first, brings forward the appraisable index of power performance and fuel economy and analyses their relation, sums up the integrated appraisable system of them.Then makes the structure analysis and parameter matching for the power-train of the heavy-duty vehicle in the item, brings forward making use of the AMT (Automatic Mechanical Transmission) instead of the MT (Mechanical Transmission), monitors all kinds of work status by sensors, with the microcomputer controlling the valve clearance, the joint of the clutch and shift, to achieve the best matching, accordingly get the advanced drive performance, balanced start performance and rapid shift ability, make it better accord with the require of power performance and fuel economy.Based on the existing research production, sets up the math model of each subsystem which belongs to the power transfer course in the automotive drive line, makes an exact description for the power transfer course.Based on the optimization design theory, makes the automotive fuel economy as the aim function, makes the power performance as the restriction condition, puts forward the optimization design method of the automotive power-train parameters, and solves it with complex algorithm.At last makes use of Matlab as a tool working out the automotive power-train parameters optimization program. It uses the Matlab/GUI as a interface tool, sets up a interface of mutual communication between man and machine. Besides the power-train parameters optimization, the program can calculate the power performance and fuel economy solely. Making the sample as a example, checks up the practicability and reliability of the program.