The Research Of Multi-Power Control Units For Parallel Hybrid Electric Vehicle

Hybrid electric vehicles (HEV), employing different energy convert devises, have incomparable advantages of traditional internal combustion vehicles in feul economy and emission. Multi-energy powertrain control system is the core of HEVs, whether which works normally can directly determine the proper function of the whole vehicles.First the author analyzes function and the value of parameters of each powertrain of HEV in detail, and sums up all input or signals of HCU. On the base of analysis, author brings forward hardware design plan and software design. HCU hardware design adopts module design method is divided in CPU module, input signal conditioning module, the impletementation of output signal module, PWM drive module and CAN communication module, as the goal of high-performance and high reliability to the controller design. Best feul economy and emission is control aim of HCU software design, then the author decides to adopt Electric Assist Control Strategy. HCU software design adopts module design method and is mainly divided into subprogram to subprogram to determine the vehicle state, subprogram to computer torque requirement, subprogram to distribute torque, subprogram to implement data check operation, subprogram to determine engine and electromotor operation state.In the last chapter, the author analyzes analyses HCU work environment and possible anti-jamming sources in detail and bring forward HCU anti-jamming measures. Then I do three comprehensive tests on the experimental bench to ensure that control system can work normally in poor environment.