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Gas/liquid mixing device for exhaust aftertreatment

A technology for an exhaust gas treatment device and a mixing device, which is applied to the electronic control of the exhaust gas treatment device, the diagnosis device of the exhaust gas treatment device, and the exhaust device, etc., can solve problems such as defects.

Inactive Publication Date: 2017-03-22
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Various mixers have been proposed, but there are drawbacks

Method used

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  • Gas/liquid mixing device for exhaust aftertreatment
  • Gas/liquid mixing device for exhaust aftertreatment
  • Gas/liquid mixing device for exhaust aftertreatment

Examples

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Embodiment Construction

[0017] The following description is merely exemplary in nature and is not intended to limit the disclosure, its application, or uses. It should be appreciated that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features. As used herein, the term vehicle is not limited to just cars, vans, or sport utility vehicles, but includes any self-propelled or towed vehicle suitable for transporting a load.

[0018] now refer to figure 1 , in an illustrative embodiment, an exhaust treatment system 10 is shown for reducing conditioned exhaust gas composition from an internal combustion (“IC”) engine 12 . Such systems may include, but are not limited to, gasoline, diesel, and homogeneous compression ignition engine systems. The exhaust gas treatment system includes an exhaust gas conduit 14 which may include several sections for conveying exhaust gas 16 from the internal combustion engine 12 to various exhaust gas treatment devices. The...

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Abstract

A mixing device for an exhaust gas conduit comprises a first, inner sleeve having an upstream end, a downstream end and an inner passage extending therethrough having a diameter D. A deflector fin is formed in the first, inner sleeve and extends into the inner passage. A second, outer air-gap shell has an upstream end, a downstream end and a central portion having a diameter D1 that is larger than the diameter D of the first, inner sleeve. The inner sleeve is disposed in the second, outer air-gap shell and the upstream and downstream ends are sealingly fixed to the first, inner sleeve to define an air-gap about the portion of the first, inner sleeve in which the deflector fin is formed.

Description

technical field [0001] Illustrative embodiments of the present invention relate to exhaust gas treatment systems, and more particularly, to exhaust gas treatment systems for internal combustion engines and vehicles incorporating internal combustion engines. Background technique [0002] Manufacturers of internal combustion engines must meet customer demands while complying with various regulations aimed at reducing emissions and improving fuel economy. Some types of exhaust treatment systems are used in vehicles employing internal combustion engines. These systems employ a variety of exhaust treatment devices. One such exhaust treatment system employs a urea selective catalytic reduction ("SCR") catalyst and a NOx reducing agent (eg, urea) that is injected upstream of the SCR catalyst using a fluid injector. The NOx reducer is converted to ammonia in the exhaust stream, which is then used to reduce NOx to N2. The use of urea as a reductant requires a urea delivery system ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/035F01N3/025F01N9/00F01N11/00
CPCF01N3/0253F01N3/035F01N9/002F01N11/002B01F25/4315B01D53/9431B01D53/9477F01N3/2892F01N13/141F01N2240/20F01N2610/1426F01N3/2066B01D53/944F01N13/08B01D2251/2062B01D2251/208F01N2610/02F01N2610/03Y02T10/12B01F23/2132B01F2025/916B01F25/3141B01F25/431974B01D53/9418
Inventor G·P·拜福德
Owner GM GLOBAL TECH OPERATIONS LLC
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