Vehicle-mounted fault diagnosis system and method for hybrid electric vehicle based on CANopen
A hybrid electric vehicle and fault diagnosis system technology, applied in the direction of electrical testing/monitoring, etc., to achieve the effects of increasing the scope of use, diagnosing communication specifications, and facilitating installation and operation
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[0032] Such as figure 1As shown, a hybrid electric vehicle needs the coordinated work of components such as motor, engine, central instrument monitoring, vehicle controller and battery, and each component is connected to the CAN bus, but CAN itself is not a complete protocol, it only includes For the physical layer and the data link layer, high-level protocols must be further developed for efficient communication. CANopen is an application layer communication protocol developed on the basis of CAN2.0. It is a public, open and general protocol. It is concise, transparent, easy to develop, and configurable. It is easy to expand to form specific network applications. Based on these characteristics, the on-board fault diagnosis system of hybrid electric vehicle adopts CANopen communication protocol. Each control system in the hybrid electric vehicle, as a node of the CANopen network, exchanges data through the CAN bus. As one of the nodes, the on-board fault diagnosis system com...
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