Measuring and testing – Instrument proving or calibrating – Liquid level or volume measuring apparatus
Reexamination Certificate
2005-06-14
2005-06-14
Williams, Hezron (Department: 2856)
Measuring and testing
Instrument proving or calibrating
Liquid level or volume measuring apparatus
C073S30400R
Reexamination Certificate
active
06904783
ABSTRACT:
A system and method for detecting a stuck or malfunctioning fuel tank level sensor calculates an estimated fuel tank level sensor value and compares the estimated sensor value with the actual sensor value. Upper and lower threshold values may also be determined along with the estimated value. If the actual sensor value falls outside the threshold values, the sensor is considered faulty and an error signal is set in the system. The system also compares the actual sensor value with a reference sensor value to detect whether the fault is due to a stuck sensor or due to a different type of sensor malfunction.
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Elenich David
Salafia Dominique
Siemens VDO Automotive Corporation
Williams Hezron
Wilson Katina
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