Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1986-08-27
1988-01-05
Tung, T.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204428, G01N 2746
Patent
active
047174641
ABSTRACT:
The invention provides an oxygen sensor for detecting oxygen concentration in exhaust gas from an internal combustion engine. The oxygen sensor comprises a closed-end tube of solid electrolyte having an inside reference electrode communicating with the atmosphere and an outside measuring electrode which is exposed to the exhaust gas, a housing to support the tube, a metallic sleeve fixed to the housing to isolate the reference electrode from the exhaust gas, while atmospheric air is allowed to enter into the tube through air passages on the metallic sleeve. The passages are protected by a filter securely fixed to the metallic sleeve, pressed by an elastic member thereagainst, whereby water or mud are prevented from entering into the tube while the sensor is operating.
REFERENCES:
patent: 4040930 (1977-08-01), Dillon
patent: 4116797 (1978-09-01), Akatsuka
patent: 4247380 (1981-01-01), McIntyre
patent: 4297192 (1981-10-01), Shinohara et al.
patent: 4323440 (1982-04-01), Akatsuka
Murase Takao
Oki Shuichiro
Oshima Norio
NGK Insulators Ltd.
Tung T.
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