XC164CM Based AMT Vehicle Control System Software Development

Microcomputer and electronic technology combination of low-cost, efficient transmission of mechanical automatic transmission, to achieve high efficiency, low cost, a better state of the automatic transmission shift has opened up a new way. Automated Mechanical Transmission AMT by the electronic control unit through the implementation of the hydraulic control of the clutch, transmission constitute, in the original fixed-gear transmission axis on the basis of the election to file, transmission, engine and clutch control Accelerator (throttle) integration with automatic computer control coordination. AMT is not only retains the original high-gear transmission efficiency and low cost, but also also had the complete merit which because the hydraulic automatic transmission gearbox fluid drive brought, automatic transmission has become an important field of research and development direction. AMT transmission efficiency, fuel economy is good, simple structure, the cost of lower than AT and CVT, suits each kind of vehicle type. Because shifts gears in the process to the coupling, accelerator's control and the need to shift the election operation coordination can be able to cause the shifting gears time to be shortest, and shifts gears steadily, therefore the control difficulty is bigger than AT and CVT. Therefore, in the development process, an important task is to block the elections, the clutch and shift the motor-driven regulation and control. In China, many universities and the automobile factory are increasing dynamics to research and develop the AMT system. Therefore, the AMT system control method of in-depth study of the AMT method of designing a good summary of the AMT on the industrialization of our country and improve the automatic transmission of the self-development capacity is of great significance.AMT is a traditional fixed-axis transmission and dry clutch on the basis of the application of electronic technology and automatic transmission theory to the total transmission control unit (TCU) as the core, through the implementation of the control system of separation and clutch engagement, the electoral shift operation As well as the engine for oil off, start to realize that the automatic gear change control. AMT control of the basic idea is: According to the driver's intention (to accelerate pedal, brake pedal, the selector switch, etc.) and the status of vehicles (engine speed, input shaft speed, speed, gear), based on appropriate control law (for Block the law, the law of clutch engagement, etc.), through the executing agency (control of oil executive body, the executive body clutch, shift the election executing agency), the vehicle's powertrain (engine, clutch, transmission) joint manipulation.Japan, the United States and Europe and other developed countries the government departments of motor vehicles and related parts and components manufacturers have invested heavily in hybrid vehicles for spare parts and research and development and to achieve a variety of hybrid electric vehicle market-oriented products. Based on Five-Year Plan period 863 electric vehicles, hybrid electric vehicle major special-issue items based in Shaanxi SX4255 heavy truck-car-like platforms, Shaanxi law to block the importation of 12 companies Shite torque 2000Nm of 12JS200T manual transmission for the prototype machine, AMT product development of heavy commercial vehicles, vehicle to complete the demarcation of the match, the automatic transmission to meet the functional requirements of the vehicle control system.In this paper, the hardware environment in order to infineon's XC164CM as the core controller chip, the main research are as follows:1, according to the requirements of AMT system, by the Electronic Control Unit under the vehicle condition information, give directions, by controlling the executive body control components, to achieve control in the clutch, automatic control of the junction. Isolation refers to the controllable range, speed and location of the joint control of the degree of precision the scope of the request by the system as a whole and determine the structure.2, AMT electronic control system hardware modular design. TCU dual-system model of the structure, that is, the Transmission management system (TMS) and variable-speed gear system (TCU). TMS mainly used for vehicle control strategy, the intention of collecting drivers and vehicles traveling state parameters, the root of the intention to show the driver and traffic parameters according to the state AMT comprehensive strategy to control the shift speed control system to issue commands. TCU received instructions TMS system, in accordance with the requirements of the process of shifting to control engine speed and torque regulation; reducer control; control of the clutch engagement with the separation, control of the transmission gear selection and shift agencies, so that the engine, reducer, clutch And coordination of transmission, such as organic, the completion of the automatic transmission shift.3, the main structure of the software in accordance with the handle for the state to determine the parameters, based on different values, different calls to determine the condition function. The main module is divided into four main function modules, main function modules, CAN communication module, the implementation of the modules and data acquisition modules.4, in support of bus communications, the development of the CAN bus communication module, suspended the use of the buffer zone and set up a way to send and receive CAN frames, the definition of a number of global variables, so as to facilitate up-to-date data.5, due to the complexity of the environment on the train, in order to consider the anti-jamming system performance, power-on self-test system, including ROM, RAM, IO, ADC, and other tests to determine the proper implementation of the program.The focus of this article in Chapter III. This chapter focuses on the AMT motor control system software design, the main sub-program module, communications module, the module acquisition, implementation of the modules, gear,.