Gasoline particulate filter diagnostics
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United States of America Patent
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Jun 18, 2019
Grant Date -
Feb 14, 2019
app pub date -
Aug 10, 2017
filing date -
Aug 10, 2017
priority date (Note) -
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Abstract
Methods and systems are provided for diagnostics of a gasoline particulate filter in an exhaust system. In one example, a method may include indicating degradation of a hose coupled across a particulate filter responsive to a difference between a first differential pressure and a second differential pressure being greater than a threshold, the first differential pressure measured by a differential pressure sensor positioned in the hose responsive to a downstream exhaust tuning valve being fully open, the second differential pressure measured by the differential pressure sensor responsive to the exhaust tuning valve being fully closed.
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