Electrolysis: processes – compositions used therein – and methods – Electrolytic analysis or testing – For oxygen or oxygen containing compound
Patent
1998-06-03
2000-08-15
Tung, T.
Electrolysis: processes, compositions used therein, and methods
Electrolytic analysis or testing
For oxygen or oxygen containing compound
204426, 204429, G01N 27407
Patent
active
061030988
ABSTRACT:
A method of operating an oxygen sensor in the exhaust stream of an engine. The oxygen sensor includes a zirconia plate (14) mounted to two electrodes (16,18), covered with porous layers (20,22). The two porous layers (20,22) are designed to sense the two conditions of air/fuel mixture, lean and rich, by creating a delay in the sensing of the rate of transmission of oxygen through one of these layers (20,22). The method includes flowing exhaust gas over the sensor, maintaining essentially no flow of current through the leads when the exhaust gas maintains a state of rich or lean air/fuel ratio, and sensing induced emf spikes between the leads as the exhaust gas stream transitions between rich and lean air/fuel ratios.
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Logothetis Eleftherios Miltiadis
Omara Ahmed Abdelaziz
Soltis Richard E.
Ford Global Technologies Inc.
May Roger L.
Stec Jennifer
Tung T.
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