Electrical circuit, particularly an electronic power circuit for motor vehicle injection systems, with a function for the detection and diagnosis of faults, and the related method
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United States of America Patent
Stats
-
Dec 22, 1992
Grant Date -
N/A
app pub date -
Jun 29, 1989
filing date -
Sep 14, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
During the piloting of the load, the current intensity and the voltage present in the load are monitored 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 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. The identification of the faulty stage or stages is also provided for in the case of a circuit including several stages in parallel.
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