Method and system for reductant injector degradation
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United States of America Patent
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Dec 22, 2015
Grant Date -
May 14, 2015
app pub date -
Nov 13, 2013
filing date -
Nov 13, 2013
priority date (Note) -
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Abstract
Various systems and methods for detecting exhaust reductant injector degradation based on an exhaust NOx sensor are disclosed. In one example, degradation of the reductant injector is indicated when an actual NOx sensor output differs from an expected NOx sensor output by more than a threshold amount under engine off conditions.
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