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    167.
    发明专利
    未知

    公开(公告)号：DE68902028T2

    公开(公告)日：1995-06-14

    申请号：DE68902028

    申请日：1989-08-17

    Applicant: MARELLI AUTRONICA

    Inventor： GIORGETTA VALERIO ,  GHISIO GUIDO

    IPC: G01R31/00 ,  F02D41/04 ,  F02D41/20 ,  F02D41/22 ,  F02D45/00 ,  G01M17/007

    Abstract: During the piloting of the load (A, B), the current intensity and the voltage present in the load are monitored (9A, 9B) by the comparison of their values with a current threshold and with a window of permissible voltage values. When the voltage is outside the window of permissible values and/or the current falls below its threshold, a fault message (FAULT) is generated and the nature of the fault (open load, short circuit to earth, short circuit to the supply voltage) is also identified by the emission of a corresponding signal of a diagnostic nature (DIAGA, DIAGB). The identification (STAGE) of the faulty stage or stages is also provided for in the case of a circuit including several stages in parallel. The preferred application is to the piloting of the injection in internal combustion engines.

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