Design Of Testing System For AMT TCU Certification

This paper describes the test system which is used for the hardwareproduct certification of the electronic control unit (TCU) of automatedmechanical transmission (AMT) of the sedan. The load signals and the sensorsignals, which are processed in a vehicle by the AMT TCU are simulated andthe TCU is tested. The test system is divided into two parts, which arehardware system and software system. The electronic-circuit realizationmethod and PC control logic of the load box system are introduced separately.The requirements of the test signals for the equipment are analyzed, andcircuitry system is developed. Test functions of the load box are studied, and ahost computer system which can freely combine test signals and test contentand monitor test results in real-time time is designedThe load box system includes load box part and PC machine part. Theload box part uses Infineon TC1767automotive chip as the core control unit.By the hardware circuitry of the load box, the load box system can achieve9roads of analog signal outputs,12roads of digital signal outputs,2roads ofPWM signal outputs,1roads of sensor’s power supply signal checking,4roads of relay load and3roads of motor load simulation. The PC controlsystem uses VC++6.0and Dreamweaver8as programming tools, which canintegrates the advantages of above two tools to improve test efficiency andresponse speed, making more beautiful software interface. The PC controlsystem uses CAN to communicate with the load box, and it can send andreceive data in real time, and save the results into storage. StandardCommands for Programmable Instruments (SCPI) is used to control Agilentprogrammable power which is used for supplying voltage for the TCU andtesting motor load ability.The load box system can test a TCU at one time, and it also supportssimultaneously test multiple TCUs whose quantity can be up to ten. The proposed load box system has passed TCU ability tests for continuous1000hours and it has no failure. This system can test TCU automatic, so it canimprove the development efficiency of the TCU.