Optimum regeneration of diesel particulate filters and NOx traps using fuel reformers

a technology of fuel reformer and diesel particulate filter, which is applied in the direction of machines/engines, mechanical equipment, human health protection, etc., can solve the problems of low efficiency of diesel engine, high emissions of nosub>x/sub>and particulates, and the inability to generate a self-supporting burn in the filter, etc., to achieve the effect of reducing the environment and reducing the amount of fuel
US20050274104A1Inactive Publication Date: 2005-12-15MASSACHUSETTS INST OF TECH
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MASSACHUSETTS INST OF TECH
Publication Date
2005-12-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

Pollution control apparatus. An exhaust aftertreatment unit is fitted to the exhaust of an internal combustion engine and a fuel reformer provides hydrogen rich gas in an optimal way to the aftertreatment unit to regenerate the aftertreatment unit. It is preferred that the hydrogen rich gas be provided only to a portion of the aftertreatment unit at any time to regenerate that portion. Stored hydrogen may be used.
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Description

BACKGROUND OF THE INVENTION

[0001] This invention relates to pollution control apparatus and more particularly to the regeneration of diesel particulate filters and NOx traps using fuel reformers.

[0002] Diesel engines have several advantages over other types of internal combustion engines such as durability, high efficiency, and low hydrocarbon and CO emissions. On the other hand, diesel engines have high emissions of NOx and particulates. Concerns about the adverse air quality effects of NOx and particulates have resulted in a United States requirement for large reductions of these pollutants by 2010. Recently there has also been the additional concern about the possibility that soot emission contributes significantly to global warming.

[0003] Diesel particulate filter (DPF) technology has been developed to control particulates. Diesel particulate filters trap soot but require periodic regeneration to purge the filters thus to allow them to continue to trap soot without building u...

Claims

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