Fault diagnosis systems development for Fuel Cell Vehicle

A hydrogen-powered Fuel Cell Vehicle is developed, in which a distributed control and communication system based on CAN (Controller Area Network) is built. For vehicle diagnostic purpose, a new on-board fault diagnosis strategy is presented. There are two efficient automotive diagnostic systems based on CAN designed and implemented in this paper: (1)CANoe is a powerful CAN development tool. A fault diagnosis environment based on CANoe is established to satisfy the needs of on-board and off-board fault diagnosis application of FCV. By setting up the communication interface between CANoe and Access, the vehicle fault codes are collected and stored. Meanwhile a database is designed for the management of fault information. (2)A hand-held fault diagnosis equipment as well as a windows analyzer interface is set up. All fault information from FCV’s CAN network can be gotten easily by the equipment. With the Serial Communication between the equipment and PC, the fault codes stored in the equipment can be read, analyzed and disposed by PC.