Method and apparatus for measuring the O.sub.2 content of a gas

Details Method and apparatus for measuring the O.sub.2 content of a gas Method and apparatus for measuring the O.sub.2 content of a gas

1977-09-26

1979-04-03

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

60276, 73 23, 324 71R, 338 34, 422 98, G01N 2704, G01R 2702

Patent

active

041475135

ABSTRACT:
A method and apparatus for measuring the O.sub.2 content in an exhaust gas of an internal combustion engine by exposing two resistors to the exhaust gas of an internal combustion engine. The resistance of both resistors varies as a function of the temperature of the exhaust gas to which it is exposed. However, the resistance of one of the resistors also varies as a function of the oxygen content of the exhaust gas. Therefore, an electrical signal can be obtained which is a function of the O.sub.2 content of the exhaust gas, with the temperature effect of the exhaust gas on the resistor being minimized or eliminated.

REFERENCES:
patent: 3400054 (1968-09-01), Ruka et al.
patent: 3828749 (1974-08-01), Knapp
patent: 3915135 (1975-10-01), Kushida et al.
patent: 3978006 (1976-08-01), Topp et al.
patent: 4001758 (1977-01-01), Esper et al.
patent: 4007435 (1977-02-01), Tien

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