Electric heating – Heating devices – Combined with diverse-type art device
Reexamination Certificate
2007-03-20
2007-03-20
Evans, Robin (Department: 3742)
Electric heating
Heating devices
Combined with diverse-type art device
C219S205000, C219S482000, C219S497000, C123S686000, C324S076490
Reexamination Certificate
active
10616558
ABSTRACT:
Methods and apparatus are provided for controlling the heating of an oxygen sensor in a motor vehicle. The apparatus comprises an oxygen sensor for measuring oxygen levels in exhaust gases of a motor vehicle. The oxygen sensor comprising a heater rod, an outer electrode surrounding the heater rod, and a shell surrounding the outer electrode and configured for mounting the oxygen sensor in the motor vehicle. A first electrical connection coupled to the outer electrode and a second electrical connection coupled to the shell are configured to facilitate measurement of capacitance between the outer electrode and the shell during operation of the motor vehicle.
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Sell Jeffrey A.
Siekkinen John W.
DeVries Christopher
Evans Robin
Fastovsky Leonid
General Motors Corporation
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