METHOD AND DEVICE FOR PUMPING OXYGEN INTO A GAS SENSOR

WIPO Patent Application WO2001029546

A3

A gas sensor is created comprising an electrochemical cell having a solid electrolyte layer disposed between an exhaust gas electrode and a reference electrode. A resistor is disposed in electrical communication with a heater and the reference electrode. The resistor can be disposed on a side of the gas sensor; on a side of the gas sensor such that the resistor is electrically connected through a via hole; over at least a portion of at least two sides of the gas sensor; or disposed in a void extending at least from the heater to the pump electrode, such that the void extends to at least a surface of the gas sensor, extends to at least partially through the gas sensor, or extends completely through the gas sensor. A method for using this gas sensor comprises applying a voltage to the heater within the gas sensor. A current is directed through the resistor to the reference electrode to pump oxygen into the reference electrode.

DUCE RICHARD W (US)
KIKUCHI PAUL C (US)
CHADWICK WAYNE M (US)
DETWILER ERIC J (US)
COHA JEFFREY T (US)
VALDES CARLOS A (US)
SANFORD SCOTT T (US)
KUISELL RICHARD C (US)

PCT/US2000/041358

March 21, 2002

October 20, 2000

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DELPHI TECH INC (US)
DUCE RICHARD W (US)
KIKUCHI PAUL C (US)
CHADWICK WAYNE M (US)
DETWILER ERIC J (US)
COHA JEFFREY T (US)
VALDES CARLOS A (US)
SANFORD SCOTT T (US)
KUISELL RICHARD C (US)

G01N27/419; G01N27/407; (IPC1-7): G01N27/417; G01N27/407

US5800689A	1998-09-01
EP0841562A2	1998-05-13
EP0845669A2	1998-06-03

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