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Automotive driveline automation is one of the core content of automotive electronic control technology. With the unskilled driver a substantial increase in the number of automotive driveline automatic transmission to become one of the important research direction to improve vehicle structure. AMT (Automatic Mechanical Transmission) - electronically controlled automatic mechanical transmission, the traditional manual gear transmission based on the integration of electronic technology, mechanical and electrical integration of high-tech products, microcomputer control technology and automatic transmission theory is the automatic transmission studies hot spots and trends. AMT is composed of three parts by TCU (Transmission Control Unit) - the electronic control system, electric actuators, automotive transmission. The electronic control system for the development and control of key parts, decided AMT shifting performance, but also the AMT design and development difficulties. In this paper, on the basis of a detailed analysis of the AMT control principle, its electronic control system hardware and software design. In the hardware design of the electronic control system, due to the large electronic control system the shift sensor signal acquisition, design, first sensing signal types classification, divided into the switch, pulse, analog, for different types of sensor signals, a design independent of the data acquisition circuit, the mutual interference between the sensors can be reduced, improving the acquisition accuracy of the sensing signal; design clutch servo motors and the election shift stepper motor drive circuit, using a integrated motor driver chip MC33486 SAA1042, direct PWM function with the the TCU main control chip port control, control simple circuit, high control accuracy: CAN controller and transceiver design in the electronic control system, so that the transmission can access the car CAN The network has become a vehicle network node, display the auto status information on the vehicle network node communication. Signal acquisition program in terms of software design, design of digital filtering software program, can reduce the error signal acquisition; software system according to the car's gear shift process sub-module design, module program can be shared, and shorten the software development cycle, reduce the code redundancy. AMT has developed low-cost, high transmission efficiency, simple control advantages, research development and application of the electronic control system, with important academic and practical value, and laid the foundation for the promotion and application of the AMT.
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