Gasoline particulate filter regeneration and diagnostics

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United States of America Patent

PATENT NO 8683786
APP PUB NO 20130008162A1
SERIAL NO

13615278

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Abstract

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A method for operating a spark-ignition engine having a three-way catalyst and a particulate filter downstream thereof, comprising: oscillating an exhaust air-fuel ratio entering the particulate filter to generate air-fuel ratio oscillations downstream of the particulate filter, while increasing exhaust temperature; when the downstream oscillations are sufficiently dissipated, enleaning the exhaust air-fuel ratio entering the particulate filter; and reducing the enleanment when an exhaust operating parameter is beyond a threshold amount.

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Patent Owner(s)

  • FORD GLOBAL TECHNOLOGIES, LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ruona, William Charles Farmington Hills, US 68 1007
Van, Nieuwstadt Michiel J Ann Arbor, US 170 2415

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