Static mixer for automobile exhaust duct

A static mixer, automobile exhaust technology, applied in the direction of fluid mixer, mixer, exhaust device, etc., can solve the problem of effective power consumption of the engine, achieve low exhaust back pressure, reduce the content of NOx, mix good effect

Active Publication Date: 2011-11-16
HANGZHOU YINLUN TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the arrangement of mixers is usually contradictory to reducing exhaust resistance, that is, the more mixers are installed, the greater the exhaust back pressure of the exhaust system, and the corresponding engine effective power loss is also greater

Method used

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  • Static mixer for automobile exhaust duct
  • Static mixer for automobile exhaust duct
  • Static mixer for automobile exhaust duct

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Embodiment Construction

[0017] Below, with reference to the accompanying drawings, through the description of the embodiments, the specific implementation methods of this patent, such as: the shape, structure, and mutual positional relationship and connection relationship between each part, the role and working principle of each part, etc. are further made. A detailed description of:

[0018] This patent is a static mixer for automobile exhaust pipes, which uses intersecting fins with a certain opening angle to make the exhaust gas and urea fully disturbed and mixed after passing through the mixer, and obtain high uniformity before entering the SCR catalytic converter. Then carry out sufficient reaction to reduce the content of NOx in automobile exhaust.

[0019] as attached figure 2 Said, a kind of automobile exhaust duct static mixer of the present invention, comprises pipe body 2, fin 3 and nozzle 4, is characterized in that described nozzle 4 is arranged on pipe body 2, and described fin 3 comp...

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Abstract

The invention discloses a static mixer for an automobile exhaust duct. The static mixer comprises a pipe body, fins and a nozzle. The static mixer is characterized in that: the nozzle is arranged on the pipe body, the sections of the fins are 'V'-shaped, and a plurality of fins with different lengths is alternately and radically arranged in the pipe body. Gas disturbance can be effectively increased by adopting the 'V'-shaped fins, so that waste gas and urea are in full turbulent mixing through the mixer, achieve relatively high uniformity before entering a selective catalytic reduction (SCR)catalyst and further are fully reacted to reduce the NOx content of the automobile exhaust. The fins with different lengths are arranged across, so that different structures of the fins can be used for strengthening disturbance, and pressure drop caused by the middle material part can be reduced. By calculation and analysis of FIR special design software of automatic vehicle location (AVL), the mixer of the structure has good mixing effect and low exhaust back pressure, and fulfills the purposes of fully mixing the jet urea and the jet tail gas without generating high pressure drop.

Description

technical field [0001] The invention belongs to the field of automobile exhaust systems, and more specifically relates to a static mixer for automobile exhaust pipes. Background technique [0002] At present, pipeline static mixers are more and more widely used in automobiles, and it has become a development trend to improve the mixing of urea water and exhaust gas and reduce NOx emissions. Generally speaking, the current exhaust system is required to reduce NOx emissions as much as possible under the premise of satisfying the exhaust back pressure and not losing the effective power of the engine. Therefore, the current automobile exhaust system requires urea water and exhaust gas to be fully mixed before entering the SCR catalytic converter, because only a mixer with high uniformity of urea and exhaust gas can fully react in the SCR catalytic converter , thereby reducing NOx emissions. However, the arrangement of mixers is usually contradictory to reducing the exhaust res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/24B01F5/06
CPCY02A50/20
Inventor 孔芬霞周小燕陈镇陆国栋帅石金赵彦光
Owner HANGZHOU YINLUN TECH CO LTD
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