HIL Simulation Research On The Electronic Control Units Of Vehicle Automatic Transmission

Automatic transmission can improve driving convenience, reduce driver labor intensity, improved occupant comfort, it is one of the vehicles powertrain development goals. The status of automatic transmission technology is analyzed in this paper, continuously variable transmission (CVT) and dual-clutch automatic transmission (DCT) is in the forefront of the automatic transmission technological development. By comparing technology characteristic of the CVT and DCT, choose metal belt type CVT for study. Brief introduce the technology status and development process of metal belt CVT. Analyze the structure, working principle and control technology of metal belt CVT which use double circle hydraulic system based on HONDA CVT prototype. Due to the special structure of metal belt,.it is much complicated to realize clamping force and ratio control. Simplify the kinetics characteristic and hydraulic system of metal belt CVT. Build the simulation model of vehicle with metal belt CVT used Matlab/Simulink software based on bench experiment data. Design PID ratio control strategy and clamping force intelligent control strategy.Based on the C8051F040 MCU design the hardware and software of metal belt CVT ECU. Bring forward design the ECU software by manual and automatic code generation for a combination. Design metal belt CVT HIL simulation platform based on dSPACE. Bring forward use Keil uVision3 software and EC3 emluator, consult the result of HIL simulation to rapidly research control strategy of metal belt CVT. Connect the CVT ECU with the HIL platform for simulation experiment, the result show that the metal belt CVT simulation model can meet the real-time demand of CVT ECU, and the model basically reflected the characteristic of CVT. CVT ECU can meet the demand of metal belt CVT control, laying the foundation of further research.