汽车通讯协议SAE J1939标准 英文版

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The SAE J1939

Communications Network

An overview of the J1939 family of standards and how they are used

Since its publication more than a decade ago, SAE J1939 has become widely accepted as the Controller Area

Network (CAN) for on-highway trucks, off-highway equipment, agricultural equipment, construction equipment,

and other vehicles.

What is J1939?

From the Foreword to J1939 (Serial Control and Communications Heavy Duty Vehicle Network)...

vehicle components. Used as an application layer, J1939 provides communication between the engine control,

transmission control, vehicle body control, and other applicable sub-control systems.

J1939 also defines message timeouts, how large messages are fragmented and reassembled, the network

speed, the physical layer, and how applications acquire network addresses.

The J1939 communications network is defined using a collection of individual SAE J1939 documents based

upon the layers of the Open System Interconnect (OSI) model for computer communications architecture.

An SAE White Paper