Methods and systems for diagnosing an intake oxygen sensor based on pressure
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United States of America Patent
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Apr 3, 2018
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N/A
app pub date -
Nov 23, 2016
filing date -
Dec 17, 2014
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Abstract
Methods and systems are provided for diagnosing an intake oxygen sensor. In one example, a method may include indicating degradation of an intake oxygen sensor based on a first time constant of an output of the intake oxygen sensor and a second time constant of an output of a throttle inlet pressure sensor. The method may further include adjusting EGR flow based on the output of the intake oxygen sensor and the output of the throttle inlet pressure sensor when the intake oxygen sensor is not degraded.
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