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US 11,047,277 B2Granted
Method and systems for particulate matter control
AssigneeTransportation IP Holdings, LLC
InventorsDavid Zielinski, Shishir Tiwari, James Robert Mischler, Michael Mangus, Matthew Hart
Life of this patent
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Abstract
Various methods and systems are provided for controlling emissions. In one example, a controller is configured to respond to a sensed exhaust oxygen concentration by changing a fuel injection timing to maintain particulate matter (PM) within a range, and then adjusting an exhaust gas recirculation (EGR) amount based on NOx sensor output and based on the change in fuel injection timing.
Claims8
A method, comprising:
- retarding fuel injection timing responsive to an exhaust oxygen concentration of exhaust gas expelled by an engine measured by an exhaust oxygen sensor being below a reference exhaust oxygen concentration, while also increasing an intake oxygen fraction of intake air admitted to the engine.
Dependencies are inferred from the claim text.