Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1989-02-23
1991-04-09
Tung, T.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204424, 204427, 204428, 204429, G01N 27417
Patent
active
050062212
ABSTRACT:
An oxygen gas concentration-detecting apparatus for use in an internal combustion engine comprising a plate-shaped substrate, a plate-shaped oxygen ion-conducting solid electrode for generating an electromotive force between a first surface contacted with air and a second surface contacted with an exhaust gas of the engine according to the difference between the concentrations of oxygen gases of the air and the exhaust gas, the solid electrode being laminated on the substrate, a pair of electrode members for taking out the electromotive force as a detection signal and a nitrogen oxide-reducing catalyst layer for promoting the reduction of nitrogen oxide arranged to cover the second surface of the oxygen ion-conducting solid electrode. By this apparatus, the concentration of oxygen gas inclusive of oxygen gas generated by reduction of nitrogen oxides can be precisely detected. The plate-shaped oxygen gas concentration-detecting apparatus enables to easily form a uniform catalyst reaction surface and to easily be heated so as to promote the stable reduction reaction of the nitrogen oxide-reducing catalyst layer.
REFERENCES:
patent: 4199425 (1980-04-01), Sinkevitch
patent: 4655892 (1987-04-01), Satta et al.
patent: 4718999 (1988-01-01), Suzuki et al.
patent: 4770760 (1988-09-01), Noda et al.
patent: 4773376 (1988-09-01), Uchikawa et al.
patent: 4795544 (1989-01-01), Nishizawa et al.
Anbe Satoshi
Kawashima Masami
Suwa Tadao
Uchikawa Akira
Yamada Tatsumasa
Japan Electronic Control Systems Co. Ltd.
Tung T.
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