State determining apparatus for humidity sensor

Details State determining apparatus for humidity sensor State determining apparatus for humidity sensor

2005-03-01

2005-03-01

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Simulating operating condition

Marine

C073S029020, C073S029010, C060S277000, C060S284000

Reexamination Certificate

active

06860143

ABSTRACT:
A state determination apparatus for a humidity sensor is provided for accurately determining the state of the humidity sensor, including the responsibility, from a result detected by the sensor itself. The state determining apparatus is configured to determine a humidity sensor arranged in an exhaust system of an internal combustion engine for detecting a humidity within an exhaust pipe. The apparatus comprises an ECU which determines whether or not the internal combustion engine is in a predetermined operating condition, calculates a change state parameter indicative of a change state of a value detected by the humidity sensor based on the detected value of the humidity sensor detected when the internal combustion engine is in the predetermined operating condition, and determines the state of the humidity sensor in accordance with the calculated change state parameter.

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patent: 6477830 (2002-11-01), Takakura et al.
patent: 1 203 878 (2002-05-01), None
patent: 2001-323811 (2001-11-01), None
patent: 2002-004842 (2002-01-01), None
patent: 2002-004846 (2002-01-01), None
Search Report dated Nov. 7, 2002.

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