Method for maintaining stoichiometric air/fuel mixtures

Details Method for maintaining stoichiometric air/fuel mixtures Method for maintaining stoichiometric air/fuel mixtures

1977-08-18

1979-06-05

Tung, T.

Chemistry: electrical and wave energy

Processes and products

204195S, 123119E, G01N 2746

Patent

active

041572823

ABSTRACT:
A durable and relatively inexpensive air/fuel ratio sensor for detecting oxygen concentration in exhaust gases of internal combustion engines, that does not require a separate reference atmosphere. A body of stabilized zirconium dioxide with two opposite major faces serves as a solid oxygen ion electrolyte. A catalytic electrode is on one of the faces, while a noncatalytic electrode is on the other face. The body is mounted in an exhaust pipe so that both of the electrodes are exposed to the exhaust gases.

REFERENCES:
patent: B843038 (1976-02-01), Sandler
patent: 3768259 (1973-10-01), Carnahan et al.
patent: 3844920 (1974-10-01), Burgett et al.
patent: 3941673 (1976-03-01), Takao et al.
patent: 4005001 (1977-01-01), Pebler

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