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US Patent 7861518 System and method for NOx reduction optimization

Patent 7861518 was granted and assigned to Cummins Inc. on January, 2011 by the United States Patent and Trademark Office.

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Current Assignee
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7861518
Patent Inventor Names
Ken R. Federle6
Date of Patent
January 4, 2011
Patent Application Number
11334735
Date Filed
January 19, 2006
Patent Citations Received
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US Patent 11905897 Fuel selection method and related system for a mobile asset
1
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US Patent 11687688 Approach for aftertreatment system modeling and model identification
2
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US Patent 11687047 Quadratic program solver for MPC using variable ordering
3
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US Patent 11680518 Engine and emissions control system
4
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US Patent 11867111 Valve arrangement for split-flow close-coupled catalyst
5
Patent Primary Examiner
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Tu M. Nguyen
Patent abstract

An engine controller determines the cost of operating a combustion engine and the cost of operating an emissions after-treatment device. Accordingly, the engine controller adjusts parameters for operation of the engine and the after-treatment device to ensure cost-effective use of the engine and the after-treatment device while complying with exhaust emissions requirements. In particular, the engine controller receives the price of fuel consumed by the engine and the price of reductant used by the after-treatment device to determine the respective cost of operation. Specifically, the fuel is diesel fuel used in a diesel engine; the reductant is urea use in a urea-based Selective Catalytic Reduction (SCR) system; and the regulated exhaust emissions is nitrogen oxide (NOx) emissions. The engine operating parameters may include cooled exhaust gas recirculation airflow, fuel injection timing, fuel injection pressure, and air-to-fuel ratio. The SCR system operating parameters may include the volume of urea injected.

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