Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1987-11-06
1988-09-27
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
123440, 204406, 204 1T, G01N 2746
Patent
active
047733764
ABSTRACT:
Disclosed is an oxygen gas concentration-detecting apparatus comprising a ceramic substrate for generating an electromotive force according to oxygen gas concentration of gases contacted with both the surfaces of the ceramic substrate, a pair of electrode members arranged on the ceramic substrate to take out the electromotive force, an oxidation catalyst layer formed on the outer surface of the ceramic substrate to promote oxidation reaction of unburnt components and a reduction catalyst layer arranged on the outer surface of the ceramic substrate to promote reduction reaction of nitrogen oxides. By this apparatus, the concentration of oxygen gas inclusive of oxygen gas generated by reduction of nitrogen oxides can be precisely detected, and discharge of nitrogen dioxides is controlled and a so-called EGR control device can be omitted. When this oxygen gas concentration-detecting apparatus is applied to an air-fuel ratio feedback control apparatus in an internal combustion engine, the above-mentioned effects are enhanced.
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Anbe Satoshi
Kawashima Masami
Suwa Tadao
Uchikawa Akira
Yamada Tatsumasa
Japan Electronic Control Systems Co. Ltd.
Nelli Raymond A.
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