System and methods for improved emission control of internal combustion engines

A technology of fuel and fuel treatment, applied to improve IC machine performance and emission control, emission control system, fuel treatment. field, able to solve problems such as system design complexity
CN1610790AInactive Publication Date: 2005-04-27能量催化系统公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
能量催化系统公司
Publication Date
2005-04-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides systems and methods to improve the performance and emission control of internal combustion engines equipped with nitrogen oxides storage-reduction ('NSR') emission control systems (206). The system comprises a NSR catalyst (206), a fuel processor (200) located upstream of the NSR catalyst, and at least one fuel injection port (208). The fuel processor (200) converts a fuel into a reducing gas mixture comprising CO and H>2<. The reducing gas mixture is then fed into the NSR catalyst (206), where it regenerates the NSR adsorbent, reduces the NO>x< to nitrogen, and optionally periodically desulfates the NSR catalyst. The fuel processor (200) comprises one or more catalysts, which facilitate reactions such as combustion, partial oxidation, and / or reforming and help consume excess oxygen present in an engine exhaust stream. The methods of the present invention provide for NSR catalyst adsorbent regeneration. Control strategies are provided to control the system and methods of the invention.
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Description

[0001] Cross References to Related Applications

[0002] This application claims priority to U.S. Patent Application Serial No. 60 / 337,023, filed December 3, 2001, entitled "Apparatus and Method for Improved Emission Control of Internal Combustion Engines," the entirety of which is incorporated herein by reference . field of invention

[0003] This invention relates generally to internal combustion ("IC") engines and, more particularly, to apparatus, systems and methods for improving the performance and emission control of IC engines that produce nitrogen oxides ("NO x ”) emissions. The invention also relates generally to emission control systems, catalytic reaction systems, and fuel treatment. Background of the invention

[0004] Efforts to improve air quality have resulted in stringent government-issued emission controls and regulations. Over the past 30 years, the permissible emissions of spark-ignition ga...

Claims

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