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US 5,635,633 AGranted
Self-diagnosis apparatus using a pressure sensor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorYoichi Kadota
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Abstract
A self-diagnosis apparatus performs a failure diagnosis of a control unit equipped with a pressure sensor based on an output thereof a pressure sensor. The apparatus performs the failure diagnosis after the elapse of a predetermined period from the time when the output of the pressure sensor has changed by a predetermined quantity.
Claims8
A self-diagnosis apparatus for diagnosing a control unit equipped with a pressure sensor, said apparatus comprising:
- first means responsive to a start of operation of said self-diagnosis apparatus for detecting a quantity of change in an output signal from said pressure sensor;
- second means for detecting the lapse of a predetermined time after the quantity of change in the output signal of said pressure sensor exceeds a predetermined value;
- and
- third means for diagnosing a failure in said control unit based on the output signal of said pressure sensor after the lapse of said predetermined time from the time the quantity of change in the output signal of said pressure sensor exceeds a predetermined value.
1 more element
Dependencies are inferred from the claim text.