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Networking Heavy-Duty Vehicles Based on SAE J1939
In networking ECUs in heavy-duty vehicles, it is the J1939 protocol that plays a key role. J1939 networks are based on the CAN bus (high-speed CAN per ISO11898); they are primarily used in powertrain and chassis components. The protocol creates a uniform basis for communication
between electronic control units, and it supports the plug-and-play principle. Special J1939 tools and software components spare developers from needing to train in the details of the J1939 protocol, and they improve the quality of the development process.
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Integration in J1939 Systems in Practice
Commercial vehicle producers are continually being confronted with problems in integrating networked systems with the J1939 protocol. Weaknesses include information exchange between OEM and supplier and different variants of the J1939 standard. Initial approaches to improvement: establish a uniform data exchange format for the CAN communication, introduce a tool for conformity testing and define mandatory device profiles.