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J1939 High Speed Serial Communications, The Next Generation Network for Heavy Duty Vehicles
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English
Abstract
Data link interfaces are a very important part of the heavy duty vehicle industry; sharing information between subsystems is vital. SAE Recommended Practices J1708, J1587 and J1922 were developed to provide standards for proprietary communications, general information sharing, diagnostic definition and early powertrain controls. The industry realized, however, that these standards would not accomplish the ultimate goal-that of a high speed control and communications network. The development of more capable serial data communications for the heavy duty vehicle industry was prompted by the following: the desire of component suppliers to integrate subsystems for improved performance; the advancement of technology; customer expectations; and government regulations. Therefore, the Truck and Bus Control and Communications Network Subcommittee began development of SAE Recommended Practice J1939 even as the J1708, J1587 and J1922 standards were being completed-this new standard would enhance previous capabilities and add new ones to better support controls and multiplexing on a single network. This paper presents the serial data communications adopted in the draft J1939 documents by discussing three major areas: the definition of J1939, the supporting information which helped determine why J1939 is like it is, and the advantages of a J1939 network.
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Citation
Stepper, M., "J1939 High Speed Serial Communications, The Next Generation Network for Heavy Duty Vehicles," SAE Technical Paper 931809, 1993, https://doi.org/10.4271/931809.Also In
References
- SAE J1213 “Glossary of Automotive Electronic Terms,” November 1982
- SAE J1708 “Serial Data Communications Between Microcomputer Systems in Heavy Duty Vehicle Applications,” June 1987
- SAE J1587 “Recommended Practice for Electronic Data Interchange Between Microcomputer Systems in Heavy-Duty Vehicle Applications,” January 1988
- SAE J1922 “Powertrain Control Interface for Electronic Controls Used in Medium Duty and Heavy Duty Diesel On-Highway Vehicle Applications,” November 1989
- “Open Systems Interconnection (OSI),” 1984
- Robert Bosch GmbH “Controller Area Network,” Stuttgart, Germany September 1991
- SAE Draft J1939 “Recommended Practice for Serial Control and Communications Network (Class C) for Truck and Bus Applications,” Truck and Bus Control and Communications Network Subcommittee May 17 1993
- SAE Draft J1939/01 “Truck and Bus Control and Communications Network,” February 10 1993
- SAE Draft J1939/11 “250k Baud, Twisted Shielded Pair Physical Layer,” May 16 1993
- SAE Draft J1939/2 “CAN 29-Bit Identifier Data Link Layer,” July 1993
- SAE Draft J1939/31 “Truck and Bus Network Layer,” December 21 1992
- SAE Draft J1939/71 “Truck, Bus, Agricultural, and Construction Equipment Application Layer,” May 15 1993
- SAE Draft J1939/8 “Network Management,” April 21 1993
- Stepper, M.R. “Data Link Overview for Heavy Duty Vehicle Applications,” SAE Paper No. 902215 Truck and Bus Meeting and Exposition Detroit, MI October 29 November 1 1990