Research and Development of Automatic Transmission Electronic Control System

Shift schedule and torque converter lockup schedule are designed based on parameters of the vehicle. In addition, optimization of shift quality based on uniform design method, which can reduce test time, is put forward and the application method is specified. Furthermore, circuit diagram of transmission control unit (TCU) hardware including power supply module, signal input channels, signal output channels and controller area network (CAN) communication module are designed, and then TCU hardware is manufactured. Finally, dynamic performance, constant speed fuel economy and shift quality of vehicle equipped with the TCU are inspected, satisfactory results are obtained.