The Research Of The Automatic Shift Principle Of The Wheel Loader

The research of the loader's automatic speed control is always the topic for construction machinery technologists and researchers. This article based on the theory of automobile driving, to obtain the high power. Through the research of the loader's rimpull character, to define the shift point under different work conditions. According to the work characteristic of the loader, the three and four parameter shift principle is analysed basedon the three parameter shift principle, which establishes the shift principle of ZL50 loader. And Then,the throttle open angle is the input data of the engine speed, the input signal is the engine speed character and the transmission gearshift, the output signal is the rimpull character of the drivetrain, all of these make up the simulate math module of the transmission system, and make the simulate test under the throttle stable automatic gearup. During the simulation process, the whole shift principle can satisfy the loader's work conditions.