Title: Oxygen concentration detector

Abstract: The present invention relates to an oxygen concentration detector to be used in a system which can simultaneously dispose of the three harmful elements in automotive emissions, i.e., unburnt hydrocarbons (unburnt HC), carbon monoxide (CO) and nitrogen oxides (NOx) through reaction with catalyst. In said detector an oxygen concentration cell comprises a solid electrolyte of a special ceramic material characterized by oxygen ion-conductivity; and the oxygen concentration of a measured gas can be analyzed by measuring the electromotive force generated through a difference in the oxygen partial pressure between the measured gas and a reference gas.

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Inventors: Otsuka, Yasuhiro (Toyota, JP)
Hori, Ryuzo (Toyota, JP)
Uchida, Kiyoshi (Toyota, JP)
Furutani, Toshinobu (Toyota, JP)

Application Number: 810886
Filing Date: 1977-06-28
Publication_date: 1979-05-01
Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota, JP)
Primary Class(es): 204/424 204/428
Other Classes:
US Patent Ref:

3619381	Nov, 1971	Fitterer	204/195.
3904486	Sep, 1975	Faurschou et al.	204/195.
3960693	Jun, 1976	Weyl et al.	204/195.
4040930	Aug, 1977	Dillon	204/195.

Other Refs:
Primary Examiner: Tung, T.
Assistant Examiner:
Attorney: Brisebois & Kruger