US Patent 7810315 LNT regeneration strategy to reduce NOx spike
Patent 7810315 was granted and assigned to Eaton Corporation on October, 2010 by the United States Patent and Trademark Office.
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Systems and methods are disclosed for ameliorating NOx slip from a lean NOx trap by reducing the amount of hydrocarbons reaching the lean NOx trap during the early stages of, or in a period immediately preceding, a rich regeneration. In one embodiment, a hydrocarbon absorber is configured downstream from a fuel reformer, but upstream from the lean NOx trap, in order to reduce the quantity of hydrocarbons that reach the lean NOx trap during lean reformer warm-up and rich regeneration phases. In another embodiment, the fueling rate to a fuel reformer configured in an exhaust line upstream from the lean NOx trap is limited to reduce NOx slip.
US Patent 07810315 LNT regeneration strategy to reduce NOx spike US Patent 7810315 LNT regeneration strategy to reduce NOx spike
US Patent 07810315 LNT regeneration strategy to reduce NOx spike
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