摘要

In view of the communication requirements and control strategy of hybrid electric vehicle, a topology of control system based on CAN bus is proposed, a CAN communication protocol for the system is developed, and several issues in protocol including the allocation of priority, the identification of single and multi-frames, the confirmation of data length and frame number and the response mechanism for important messages are studied. The bus load rate in three different situations are compared by simulation with CANoe and the real-time performance of CAN is tested by rate monotonic analysis method. The results show that the system has a low bus load and good communication realtimeness, well meeting control requirements.

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