"SAE J1939协议英文版——车辆应用层 J1939-71"

The SAE J1939 protocol is an industry standard recommended practice for the communication and diagnostics of heavy-duty vehicles. This protocol, specified in the Vehicle Application Layer — J1939-71, provides a common language for electronic control units (ECUs) to communicate with each other on a vehicle network. SAE Technical Standards Board Rules govern the publication of the SAE J1939 protocol, emphasizing that its use is voluntary and the responsibility of the user to determine its suitability for any particular application. The protocol is intended to advance the state of technical and engineering sciences in the field of vehicle communication and diagnostics. Key features of the SAE J1939 protocol include standardized messaging formats, parameter group numbers, and diagnostic trouble codes, allowing different ECUs from various manufacturers to communicate effectively on the same network. This standardization enables interoperability between components and systems on a vehicle, enhancing reliability, efficiency, and overall vehicle performance. Overall, the SAE J1939 protocol plays a critical role in the automotive industry by providing a common framework for communication and diagnostics in heavy-duty vehicles. Its voluntary adoption by industry stakeholders underscores its importance in advancing technical standards and ensuring interoperability in vehicle systems.