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Ash reduction system using electrically heated particulate matter filter

A filter, electric heating technology, applied in the direction of machine/engine, electric control of exhaust treatment device, mechanical equipment, etc.

Inactive Publication Date: 2011-03-30
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the increased oxygen content makes it possible to regenerate the PM filter quickly, there are some problems

Method used

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  • Ash reduction system using electrically heated particulate matter filter
  • Ash reduction system using electrically heated particulate matter filter
  • Ash reduction system using electrically heated particulate matter filter

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Embodiment Construction

[0016] The following description is merely exemplary in nature and is not intended to limit the invention, application or uses. It should be appreciated that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

[0017] The term "module" as used herein refers to an Application Specific Integrated Circuit (ASIC), a circuit, a processor (common, specialized, or cluster) that executes one or more software or hardware programs, and memory, combinational logic, and / or Other suitable components provide said functionality.

[0018] The present invention utilizes the oxidation properties of an electrically heated PM filter to reduce the amount of ash accumulated in the PM filter. Ash mainly consists of a mixture of calcium and zinc as a by-product of burning engine oil. Ash tends to accumulate slowly behind the PM filter. However, burning ash at too high a temperature can lead to vitrification of the ash.

[0019] Referring n...

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PUM

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Abstract

A control system for reducing ash comprises a temperature estimator module that estimates a temperature of an electrically heated particulate matter (PM) filter. A temperature and position estimator module estimates a position and temperature of an oxidation wave within the electrically heated PM filter. An ash reduction control module adjusts at least one of exhaust flow, fuel and oxygen levels in the electrically heated PM filter to adjust a position of the oxidation wave within the electrically heated PM filter based on the oxidation wave temperature and position.

Description

[0001] Statement of Government Rights [0002] This invention was made pursuant to US Government Contract No. DE-FC-04-03AL67635 with the Department of Energy. The US Government has certain rights in this invention. technical field [0003] The present invention relates to particulate matter (PM) filters, and more particularly to ash reduction systems for PM filters. Background technique [0004] The statements in this section merely provide background information related to the present invention and may not constitute prior art. [0005] Engines, such as diesel engines, produce particulate matter (PM) that is filtered from exhaust by a PM filter. The PM filter is arranged in the exhaust system of the engine. The PM filter reduces the emission of PM generated during the combustion process. [0006] After a while, the PM filter fills up. During regeneration, PM can be combusted within the PM filter. Regeneration often involves heating the PM filter to the combustion tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F01N3/027
CPCF01N9/002F01N3/027Y02T10/47Y02T10/40
Inventor E·V·贡泽M·J·小帕拉托尔Y·何
Owner GM GLOBAL TECH OPERATIONS LLC