Electrical resistors – Resistance value responsive to a condition – Gas – vapor – or moisture absorbing or collecting
Reexamination Certificate
2007-06-26
2007-06-26
Hoang, Tu (Department: 2832)
Electrical resistors
Resistance value responsive to a condition
Gas, vapor, or moisture absorbing or collecting
C073S023360
Reexamination Certificate
active
10517771
ABSTRACT:
The present invention provides a resistance-type oxygen sensor, and an oxygen sensor device and an air/fuel ratio control system using same. The present invention relates to a resistance-type oxygen sensor with suppressed temperature dependence, wherein: (1) a gas detection unit composed of an oxide semiconductor with a resistance value varying according to temperature and the oxygen partial pressure of atmospheric gas and a temperature compensation unit composed of a conductor with suppressed dependence of a resistance value on oxygen partial pressure are connected in series; (2) the temperature compensation unit is composed of an oxygen ion conductor; and (3) an electrode for electric contact with the temperature compensation unit is exposed to the atmospheric gas and is a porous body; an oxygen sensor device and an air/fuel ratio control system.
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Izu Noriya
Murayama Norimitsu
Shin Woosuck
Hoang Tu
National Institute of Advanced Industrial Science and Technology
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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