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AssigneeFord Global Technologies, LLC
InventorsGopichandra Surnilla, Hao Zhang, Richard E. Soltis, William Russell Goodwin, Robert F. Novak, David Bilby, Evangelos P. Skoures
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Methods and systems are provided for an oxygen sensor heater. In one example, a method may include applying a less than maximum duty cycle of voltage to the oxygen sensor heater during an engine cold start (e.g., when a temperature of the oxygen sensor is less than its light-off temperature) and adjusting the applied duty cycle of voltage to maintain a constant amount of power. In this way, the oxygen sensor may be heated at a constant rate even as a resistance of the oxygen sensor heater increases, decreasing an amount of time before the oxygen sensor reaches its light-off temperature.
An oxygen sensor heater control method, comprising:
Dependencies are inferred from the claim text.