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Injection nozzle for supplying reducing agent, and device for treating exhaust gases

A technology for injecting nozzles and reducing agents, which is applied to exhaust devices, fuel injection devices, exhaust gas treatment, etc., can solve problems such as difficulty and low technical complexity, and achieve the effect of simple structure

Inactive Publication Date: 2014-03-26
EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] This result has hitherto not been achieved in a completely satisfactory manner, in particular with a low degree of technical complexity, for many different exhaust gas systems
In this regard, retrofitting existing exhaust systems in motor vehicle construction is particularly difficult

Method used

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  • Injection nozzle for supplying reducing agent, and device for treating exhaust gases
  • Injection nozzle for supplying reducing agent, and device for treating exhaust gases
  • Injection nozzle for supplying reducing agent, and device for treating exhaust gases

Examples

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Embodiment Construction

[0041] figure 1 A schematic frontal detail of the injection nozzle 1 is shown, wherein the reducing agent 2 is fed through a central feed duct 13 towards the tip of the injection nozzle 1 in the indicated flow direction (see arrow). At the tip a first outlet opening 4 and a second outlet opening 5 are provided. The first outlet opening 4 has a first cross section 8 embodied differently from the second cross section 9 of the second outlet opening 5 . In this case, the first cross section 8 is made significantly larger. The first outlet opening 4 and the second outlet opening 5 also differ with respect to the spray direction (shown in dashed lines). During the feeding of the reducing agent 2 to the feed conduit 13 at a predetermined pressure, the reducing agent 2 flows through the first outlet opening 4 and the second outlet opening 5 simultaneously and produces different droplets in each case. In particular, these droplets differ with regard to their flight paths in the exha...

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Abstract

An injection nozzle for supplying reducing agent to an exhaust gas system includes a plurality of outlet openings, each of which can generate different droplets of the reducing agent. A device for the treatment of exhaust gases includes an exhaust gas treatment unit and at least one corresponding injection nozzle, in which at least two groups of outlet openings form different impingement regions on the exhaust gas treatment unit.

Description

technical field [0001] The invention relates to an injection nozzle for supplying a reducing agent to an exhaust gas system and also to a device for exhaust gas treatment having an exhaust gas treatment unit and at least one injection nozzle. Systems of this type are used in particular for the controlled addition of aqueous ammonia solutions to the exhaust gas system in order to reduce, inter alia, the nitrogen oxide content in the exhaust gas. Background technique [0002] For example, a method for converting nitrogen oxides, especially in exhaust gases, using an aqueous urea solution and a suitable catalyst is called "selective catalytic reaction (SCR) method". [0003] Typically, the ammonia required for the SCR reaction is not used directly, i.e. pure ammonia, but in the form of 32.5% urea in water, which is also available under the trade name AdBlue get. This aqueous solution can be injected into the exhaust part before the SCR catalyst, for example by means of a met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20F02M61/18
CPCY02T10/24F01N3/2066F02M61/1826F01N2610/1453Y02T10/12F01N3/20F01N3/28F02M61/18
Inventor 沃尔夫冈·毛斯罗尔夫·布吕克
Owner EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBH