The Research Of Automobile Transmission Assembly Test Platform

Automobile transmission is one of the major parts in the automobile gearing system,the performance of the transmission has a direct influence on the overall performance of the automobile.It is important to test automobile transmission. The thesis systematically analyzes the performance, function and requirements of the automobile transmission, it synthesizes mechanism, hydraulic pressure and electric system and designs the automobile transmission assembly test platform to complete the test of torque loaded after the automobile transmission is assembly.The input and output axis equipment is designed in the test platform. The input axis pull (positive pull) completes the noise test of the transmission at different gears. The output axis pull (reverse pull) test the shifting at different gears. The rotate speed adjustment of the input electromotor is done by transducer, and the rotate speed and torque design of the output electromotor is complemented by the servo system. The working condition of the analogue automobile is achieved by means of the electric control system's control over the input electromotor and the output electromotor's repeated power switch. At the same time,the hydraulic pressure system is designed to control the transmission installation and clamp, the transmission's infusing and discharging of lubricating oil, the opening and closing of the input clutch, and the advance and retreat of the output rear seat.The input and the output assembly framework is designed, and the transmission-specialized infusing and discharging mechanism is designed. The data communication between the servo controller, transducer controller, PLC and every meter, as well as the data report forms is realized through the IPC, and real-time control is also achieved. The sensor system and the meters complete the output torque, input and output rotate speed, the noise of the transmission, the flow capacity of the infusing and discharging, and the oil temperature measurement and monitoring.The structure of the test platform is simple and reasonable. The functions are fully developed, and the operation is convenient. A set of accurate and comprehensive digital display system has been designed. It has been proved through use that its performance is stable and reliable, and it can fully meet the requirements of production test.