Power plants – Internal combustion engine with treatment or handling of... – Having means analyzing composition of exhaust gas
Reexamination Certificate
2006-07-11
2006-07-11
Tran, Binh Q. (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
Having means analyzing composition of exhaust gas
C060S277000, C060S285000, C123S688000, C073S023320, C073S023330, C073S118040, C701S107000, C701S115000
Reexamination Certificate
active
07073320
ABSTRACT:
A fault detecting apparatus for a gas concentration sensor is provided. The apparatus includes a storage device and a fault detecting circuit. The storage device stores therein fault detectable conditions in which preselected different types of faults of the gas concentration sensor are allowed to be detected, respectively. The fault detecting circuit works to detect a selected one of the faults stored in said storage device. When one of the fault detectable conditions is encountered during operation of the gas concentration sensor, the fault detecting circuit initiates detection of a corresponding one of the faults based on an output of the gas concentration sensor, thereby enabling the fault detecting circuit to identify the type of one of the faults to be detected correctly.
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Kurokawa Eiichi
Makino Daisuke
Mizutani Keigo
Moritsugu Michiyasu
Tomura Takanao
Denso Corporation
Nippon Soken Inc.
Nixon & Vanderhye P.C.
Tran Binh Q.
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