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US 10,481,065 B2Granted
Methods and systems for exhaust particulate matter sensing
AssigneeFord Global Technologies, LLC
InventorsXiaogang Zhang, David Charles Weber, Vidhushekhar Zambare
Life of this patent
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Abstract
Methods and systems are provided for a PM sensor. In one example, a method comprises flowing exhaust gas to a cone-shaped PM sensor having a pair of openings arranged across from one another and a plurality of outlets distal to the pair of openings.
Claims20
A method, comprising:
- flowing exhaust gas proximal to a central axis of an exhaust passage through a first opening of a cone-shaped soot sensor;
- expelling a first portion of the exhaust gas through a second opening directly across the first opening, and diverting a second portion of the exhaust gas around flow diverters spaced about electrodes distal to the central axis.
A particulate matter sensor, comprising:
- a cone-shaped outer shell comprising a hollow interior with a first opening admitting exhaust gas thereto;
- a disc-portion of the outer shell includes a first flow deflector coupled to a first surface and a second flow deflector coupled to a second surface;
- and
- a plurality of second openings configured to expel exhaust gas from the disc-portion to an exhaust passage in a direction perpendicular to a general direction of exhaust gas flow.
1 more element
A system, comprising:
- an engine coupled to an exhaust passage;
- a cone-shaped soot sensor comprising a first opening at its apex admitting exhaust gas from the exhaust passage, a plurality of second openings and a third opening configured to expel exhaust gas from a hollow interior of the cone-shaped soot sensor;
- and
- a controller with computer-readable instructions stored on non-transitory memory thereof that when executed enable the controller to:
- regenerate a substrate of the cone-shaped soot sensor in response to a measured resistance by activating a heating element.
2 more elements
Dependencies are inferred from the claim text.