The problems of conventional automotive wiring harnesses and how they can be minimised by multiplexing are discussed. The multiplexed wiring harness replaces the conventional harness with a cable bus carrying power and time-division multiplexed control signals to electronic modules that decode the control signals and activate power switches accordingly. An experimental multimicrocomputer multiplexing system is described. It has a centralised processing unit (CPU) and up to eight local processing units (LPU) interconnected to the cable bus. The electronic harness is controlled by the CPU which processes all inputs to the system and then transmits commands to the LPUs for control of each function of the electrical system. The CPU is located in close proximity to the dashboard and the majority of control inputs are directly wired into the CPU board. The LCUs are located in areas of high load density in the vehicle. Connections between the LPUs and the peripheral electrical equipment are made by small subharnesses, in most cases by a single fly lead. An LPU will only respond to a command signal from the CPU when the command address and its own address match.


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    Title :

    Multiprocessor implementation of the logic function of a multiplexed wiring system for automotives


    Additional title:

    Einbau von Multiprozessoren mit logischen Funktionen im multiplexen Leitungssystem von Kraftfahrzeugen


    Contributors:
    Preston, N.C. (author) / Lucas, J. (author)


    Publication date :

    1982


    Size :

    6 Seiten, 8 Bilder, 1 Tabelle, 10 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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