Simulation Research on the Electronically Hydraulic Shifting Actuator Performance of Heavy-Duty AMT

Heavy duty commercial truck plays a very important part in land transportationeven in the whole transportation. At present most of domestic heavy duty truckequipments manual transmission, therefore the dynamics and fuel economy are notgood, more than that, driving control has lots of problems because of gear’s frequentshift. Comparably heavy trucks with AMT (Automated Mechanical Transmission)technology have many advantages, which will full the needs of industry and markets.So the research and development of AMT have very peculiar significance in China.This essay has done a deeply penetrate research about heavy duty truck thendesigned electronically hydraulic gear change system of AMT; Research on theproperty of the electronically hydraulic shifting actuator. Specifically, the full-textcontent research of the essay is mainly as following:1. Overview the development history and the present research situation of AMTon heavy duty truck, basic working principle of this technology; briefly introductionof core technology about the application and development of AMT; research on thecomponent elements and work principle of heavy duty truck, and analyze threecontrol ways of AMT.2. Analyze the function requirement of gear shifting actuator. Globally designthe project of gear shifting actuator. Analyze on the main components of actuator.Compare the date, structure, property of electronically hydraulic executive body basedon the project plan. Analyze the property of hydraulic shifting actuator and the valve.3. Research the influence of the project plan on the gear property; deducemathematic formula; choose the parameters about the value of shifting force, thetopping up of fluid cylinder, the construct the dynamics of synchronizer, thedetachment and joint of clutch, the property of solenoid valve, and erect the math model of them.4. Use correlate software-MATLAB/Simulink to do simulation and analysisbased on the models constructed previously, get the simulation of clutch’s work andthe electrically hydraulic shifting actuator, then analyze the result of simulation andget the project plan’s expected goal.The research of the essay has some practical and theoretical significance to thefurther study of AMT.