Method and system for exhaust particulate matter sensing
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United States of America Patent
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Oct 16, 2018
Grant Date -
Jan 25, 2018
app pub date -
Jul 19, 2016
filing date -
Jul 19, 2016
priority date (Note) -
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Abstract
Methods and systems are provided for a particulate matter (PM) sensor assembly positioned downstream of a diesel particulate filter in an exhaust system. In one example, a PM sensor assembly may include a bent tube having a first, upstream end coupled to an exhaust passage, and a second outwardly flared end at a downstream end of the assembly. In this way, the second end of the bent tube may form a venturi that serves to block larger particulates from entering the assembly, and additionally serves to increase exhaust flow into the sensor assembly.
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