Failure detection system of pressure sensor

Details Failure detection system of pressure sensor Failure detection system of pressure sensor

1999-05-04

2000-03-21

Williams, Hezron

Measuring and testing

Instrument proving or calibrating

Fluid pressure

73 166, 731181, 73 497, G01L 2700, G01M 1900

Patent

active

060389125

ABSTRACT:
A determination as to whether or not the absolute value PCHK of the deviation between a detection value PTANK of a pressure sensor and its average value PTANKAVE exceeds a predetermined pressure DLEAKCHK is repeated within a predetermined time TINTVAL. The number of times the absolute value PCHK has exceeded the predetermined pressure DLEAKCHK is measured on a failure determination counter C91BNG. When the value of the counter C91BNG exceeds a determination threshold value 91BJVD, it is determined that the pressure sensor fails (time t10).

REFERENCES:
patent: 4744244 (1988-05-01), Tanaka
patent: 5469735 (1995-11-01), Watanabe
patent: 5750888 (1998-05-01), Matsumoto et al.
patent: 5945596 (1997-04-01), Burkel et al.

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