Internal combustion engine exhaust gas oxygen sensor and catalyz

Details Internal combustion engine exhaust gas oxygen sensor and catalyz Internal combustion engine exhaust gas oxygen sensor and catalyz

1976-12-06

1979-01-02

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

123119E, 4232135, 204 1S, G01N 2746

Patent

active

041326156

ABSTRACT:
To avoid temperature shock and mechanical damage to oxygen sensors with ion conductive solid electrolytes exposed to the exhaust gases of internal combustion engines, a catalyst, for example in the form of aluminum oxide pellets having a catalyzing surface layer, is located to surround the oxygen sensor, or just in advance of the oxygen sensor in a bypass pipe, branching off from the exhaust gas pipe of the engine to take samples of the exhaust gases so that the sensor and catalyst form an assembly, or sensing combination. The catalyzing layer may be platinum, or a platinum metal, or an alloy of platinum with aluminum, cobalt, nickel, or chromium, or may be mineral wool, or wool of glass, or asbestos fibers having their surface coated with any of the foregoing catalysts.

REFERENCES:
patent: 3189563 (1965-06-01), Hauel
patent: 3544264 (1970-12-01), Hardison
patent: 3616274 (1971-10-01), Eddy
patent: 3654111 (1972-04-01), Csuros
patent: 3768259 (1973-10-01), Carnahan et al.
patent: 3835012 (1974-09-01), Hemak
patent: 3841987 (1974-10-01), Friese et al.
patent: 3844920 (1974-10-01), Burgett et al.
patent: 3935089 (1976-01-01), Togawa et al.
patent: 3981785 (1976-09-01), Sandler

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