Study On Shift Schedule Of Fuzzy Automatic Transmission

As a kind of special vehicle,the engineering vehicle,it is being widely used in the fields of construct .There are a lot of working tasks with engineering vehicle it's operation is very complex, working situation is the worst,so there are have very important realism signification with engineering vehicle automatic transmission technology for high efficiency .Base on the DOCTOR Foundation project"Study on Automatic Shift Technology with Four-parameter of Construction Vehicle",this paper study of automatic transmission and the shift law Automatic Transmission System Simulation, the main contents include:The first , summing up automatic transmission technology at home and abroad, discussed the principle of automatic transmission and automatic transmission technology development in the world. Automatic Transmission Engineering Vehicle trend of development and engineering for automatic transmission vehicles significance.Analysis vehicle transmission system and the establishment of a mathematical model, for the follow-up to Fuzzy Automatic Transmission Control System Analysis and Simulation of the establishment of the necessary theoretical basis. Power system with the establishment of the X1630 Diesel mathematical model right engine of the economy and the performance analysis. Torque Converter is a mechanical model, with the torque converter YJ355 its performance is analyzed. Focus on the engine torque converter and a reasonable match on the study.Expounded the existing engineering automatic transmission control method and its characteristics, and from the transmission torque converter start. detailed discussion of the use of transmission shift control torque converter has highefficiency in the possibility. A fuzzy strategy shift, engineering vehicles for the transport situation and the task of different conditions, the shift law so that the torque converter transmission efficiency can be maintained in the District efficient vehicles and content in different conditions on the performance requirements . Development of a multi-input single-output structure of the fuzzy controller. and the application of Matlab Toolbox (fuzzy logic), strategic analysis Shift Schedule of Fuzzy of this paper a.Application MATLAB/SIMULINK, The typical vehicle ZL50 loader transmission system for the dynamic modeling and simulation. A transmission system simulation model, which mainly include the diesel engine, transmission and hydraulic torque converter 3 simulation module. Vehicles with the actual operating environment and operational characteristics of the vehicle body engineering information model. Fuzzy established a loader automatic speed control system simulation model. These simulation models to simulate the transport conditions and task conditions experiment .Verified fuzzy control system by this paper, can be the right for automatic recognition of the status of vehicle, can according to different fuzzy strategy shift stalls transform, torque converter to enable efficient work in the region to content the current condition of the vehicles requirements.This paper summarizes the final results of research work and the problems that exist.In summary, the text of the Shift Schedule and shift control strategy enriched the vehicle control theory, to enhance vehicle level of automation, improve transmission efficiency, energy conservation, have some theoretical and practical value.