Failure diagnostic method and apparatus for manifold pressure sensor

To identify a failed manifold pressure sensor in a control apparatus having two manifold pressure detection systems as a. A calculating unit calculates a difference between the manifold pressure detected by two sensors. A first comparing unit outputs an abnormal signal when the difference is larger...

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Bibliographic Details
Main Author HASEGAWA SHUMPEI
Format Patent
LanguageEnglish
Published 17.08.2006
Subjects
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Summary:To identify a failed manifold pressure sensor in a control apparatus having two manifold pressure detection systems as a. A calculating unit calculates a difference between the manifold pressure detected by two sensors. A first comparing unit outputs an abnormal signal when the difference is larger than a threshold value. A calculating unit calculates a difference between the manifold pressure and the atmospheric pressure. A difference calculating unit calculates a difference between the manifold pressure and the atmospheric pressure. When the abnormal signal is outputted from the first comparing unit while an engine is stopped, a second comparing unit compares the differences in response thereto. Depending on which one of the differences is larger, it is determined which one of the manifold pressure sensors is abnormal.
Bibliography:Application Number: US20060354077