Oxygen concentration sensor for an internal combustion engine

Details Oxygen concentration sensor for an internal combustion engine Oxygen concentration sensor for an internal combustion engine

1987-07-10

1988-11-29

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204410, 204412, 204425, G01N 2758

Patent

active

047879661

ABSTRACT:
An oxygen concentration sensor having an oxygen ion conductive solid electrolyte member forming a gas diffusion restricted region into which a measuring gas is introduced, includes a pump current source for supplying a pump current across a pair of electrodes sandwiching the solid electrolyte through a current detection element and a heater for heating the solid electrolyte. By an arrangement in which the current detection element is connected to one of the pair of electrodes facing the gas diffusion restricted region, error of measurement due to leakage of a drive current of the heater is prevented.

REFERENCES:
patent: 4272329 (1981-06-01), Hetrick et al.
patent: 4707241 (1987-11-01), Nakagawa et al.

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