METHOD FOR EVALUATING DEGRADATION OF A PARTICULATE MATTER SENSOR AFTER AN ENGINE START
A system for improving operation of an engine having a particulate matter sensor is presented. The system may be used to improve engine operation during cold starts especially under conditions where water vapor or entrained water droplets are present in vehicle exhaust gases. In one embodiment, part...
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Main Authors | , , , , , , |
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Format | Patent |
Language | English |
Published |
03.03.2011
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Subjects | |
Online Access | Get full text |
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Summary: | A system for improving operation of an engine having a particulate matter sensor is presented. The system may be used to improve engine operation during cold starts especially under conditions where water vapor or entrained water droplets are present in vehicle exhaust gases. In one embodiment, particulate sensor degradation is indicated in response to an output of said particulate matter sensor staying below a threshold as engine temperature increases past the dewpoint temperature. |
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Bibliography: | Application Number: US20090643575 |