Oxygen sensor

Details Oxygen sensor Oxygen sensor

1976-02-05

1977-08-09

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

G01N 2746

Patent

active

040409309

ABSTRACT:
Oxygen sensor for automotive use incorporates a disc of solid electrolyte material which is mounted in the end of a short ceramic tube so as to be positioned near the end of a metal body member in which the tube is mounted and adjacent to the wall of an exhaust pipe into which the body member is mounted. For improved stability against vibration damage, the ceramic tube has an unsupported length which is less than about 150% of its diameter. Precious metal stripes on the ceramic tube carry the electrical signal generated between the electrodes on the hot electrolyte to relatively cool portions of the body member where they are conducted to external terminals through spring biased contacts. A tubular metal shield, which may enclose a porous ceramic filter, protects the electrolyte from exhaust particles and directs heat from the center of the exhaust pipe to the electrolyte disc.

REFERENCES:
patent: 3768259 (1973-10-01), Carnahan et al.
patent: 3835012 (1974-09-01), Hemak
patent: 3844920 (1974-10-01), Burgett et al.
patent: 3847778 (1974-11-01), Riddel
patent: 3909385 (1975-09-01), Spielberg et al.
patent: 3915828 (1975-10-01), Cleary et al.
patent: 3928161 (1975-12-01), McIntyre et al.
patent: 3940327 (1976-02-01), Wagner et al.
patent: 3960692 (1976-06-01), Weyl et al.
patent: 3960693 (1976-06-01), Weyl et al.

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