Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating
Patent
1980-05-23
1981-04-28
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
Vacuum arc discharge coating
60276, 123489, G01N 2758, F02M 700
Patent
active
042644259
ABSTRACT:
A device having an oxygen sensing probe to be disposed in a combustion gas to detect actual air/fuel ratio values of an air-fuel mixture subjected to combustion. The probe is a combination of two oxygen concentration cells each having a porous solid electrolyte layer such as of zirconia, a porous measurement electrode layer on one side of the solid electrolyte layer and a reference electrode layer on the other side, with a shield layer thereon. Either the shield layers of the two cells or the solid electrolyte layers of the two cells are provided by a single layer which serves also as a substrate of the entire probe. The device includes DC power supply means for forcing a current to flow through the solid electrolyte of each cell thereby to cause oxygen ions to migrate through each solid electrolyte layer, from the reference electrode layer to the measurement electrode layer in one cell and reversely in the other cell. Both air/fuel ratios above a stoichiometric ratio inclusive and air/fuel ratios below the soichiometric ratio inclusive can be detected by this device.
REFERENCES:
patent: 3674436 (1972-07-01), Geul
patent: 4207159 (1980-06-01), Kimura et al.
Aoki Hiroyuki
Ikezawa Kenji
Ishitani Shigeo
Kimura Shinji
Takao Hiroshi
Kaplan G. L.
Nissan Motor Company Limited
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