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Multi-processor system in a motor vehicle

  • US 5,367,665 A
  • Filed: 04/16/1992
  • Issued: 11/22/1994
  • Est. Priority Date: 04/16/1991
  • Status: Expired due to Fees
First Claim
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1. A multi-processor system for a motor vehicle for carrying out control functions, the system comprising:

  • at least two processors;

    said processors each including means for detecting a fault of the other one of said processors during the operation of said system and means for generating a reset signal to trigger a restart of said system during the operation thereof;

    means for supplying said reset signal to each of said processors at the beginning of an operating cycle when power is switched on to start said system;

    said reset signal being supplied to said processors to carry out a first step sequence to define a cold start routine when power is switched on and to carry out a second step sequence to define a warm start routine when restarting said system;

    each of said processors including means for distinguishing between when power is switched on and a restart based on changeable identifiers;

    each of said processors having a changeable identifier which is set to a first pregiven value by said reset signal and which is set to a second pregiven value by said reset signal after said system is started;

    means for permitting said processors to exchange their identifiers; and

    ,each of said processors including means for comparing its own identifier to the identifier of the other processor to distinguish between when said power is switched on and a restart and for selecting the corresponding one of said step sequences.

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