Research On The Shifting Gear Schedule Of The AMT Automobiles

This paper based on the actual project, primarily studies on shift schedules for the automatic mechanical transmission (AMT) of the series of Junjie car , in order to improve the power and fuel-economy of the vehicle.Shift schedules decide the time to shift and are the soul of the AMT. When the AMT is working, by comparing the states of the vehicle with the optimal shift schedules, the AMT decides the optimal shift time and achieves the shift automatically. This will lessen the tiredness of the driver and improve the safety. At the same time, the power and fuel-economy of the vehicle can also be improved. The author chooses the shift schedule as the key technology problem to be researched and the main study aim of this thesis is to get the optional shift schedules for the AMT and so improve the power and fuel-economy of the vehicle.Through analyzing the influence factors of power and fuel-economy for the automobile, the author get the establishment methods for the optional power shift schedule and optional economical shifting schedule. In this paper, the optional economical and the optional power schedule for the shifting gear of the AMT automobiles is analysed and researched. Considering the economy and power of automobiles, a synthetical shifting gear schedule is further researched, enriching the control theory of the automatic shifting gear of the AMT vehicles. Because the computer simulation can save a lot of manpower and material resources comparing with the true-car test, so in this thesis, the author uses the simulation toolbox Matlab /Simulink to set up the simulation model for shift schedules. Using this model, the optional economical,the optional power and the synthetical shifting gear schedule above are simulated and proved to be reasonable.