Application of CAN Bus to HEV Based on MPC5xx Microcontroller

In this paper, CAN Bus, which works in good real-time and high reliability, was designed and programmed based on 32-bit CPU-MPC5xx with high performance for hybrid electric vehicle (HEV). HEV controller based on MPC5xx was developed which can transfer data by CAN Bus with other ECUs of drivetrain assemblies such as engine, motor and battery according to the HEV control algorithm and requirements. To verify the reliability of HEV controller based on MPC5xx and the accuracy of data transmission over CAN Bus, the bench test platform was established based on the dynamometers. Test results show that not only CAN communication is reliable and accurate, but also HEV controller based on MPC5xx can effectively harmonize the task distribution among all ECUs of drivetrain assemblies with the real-time control improved greatly for HEV control system.