Injector for a urea-water solution

Inactive Publication Date: 2014-02-06
EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides an improved injector for urea-water solution that solves problems of previous injectors. The injector is cost-effective, resistant to ice pressure, and protected from high temperatures. It includes a separate feed pipe and nozzle plate that can be easily detached for replacement. The nozzle plate has low thermal conductivity and repels urea-water solution to prevent deposits and by-products. The main body forms a reservoir for the urea-water solution, and the valve is disposed movably relative to the reservoir to avoid damage from freezing. The main body also includes a plurality of intake pipes that open into the reservoir, allowing for versatility in positioning and increased metering precision.

Problems solved by technology

In particular, an injector for a urea-water solution is to be provided which can be produced in a cost-effective manner, is not susceptible to ice pressure of the urea-water solution when frozen, and is adequately protected from the high temperatures of the exhaust gas system.

Method used

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  • Injector for a urea-water solution
  • Injector for a urea-water solution
  • Injector for a urea-water solution

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Embodiment Construction

[0032]Referring now in detail to the figures of the drawing for explaining the invention and the technical field in more detail by showing particularly preferred structural variants to which the invention is not restricted, and first, particularly, to FIG. 1 thereof, there is seen a partly-exploded perspective view of a variant of an injector 1 for a urea-water solution. An adapter for pipe fittings 28 is shown in broken lines on the right-hand side of FIG. 1, in which upwardly directed pipe fittings form, for example, a cooling water supply and drain and a central linear pipe fitting represents a connecting pipe for the urea-water solution. These pipe fittings 28 can be conveniently disposed on a main body 2 of the injector 1, for example by using screws as shown in this example. The pipe fittings 28 for the cooling system open into an inlet 11 or outlet 12 provided for this purpose. A fitting 3 is formed in the main body 2 opposite the pipe fitting 28 for the urea-water solution, ...

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Abstract

An injector for a urea-water solution includes at least a main body with a fitting for the urea-water solution, a valve with a valve drive and a separate feed pipe for the urea-water solution. The separate feed pipe extends at least partly through the main body.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This is a continuation application, under 35 U.S.C. §120, of copending International Application No. PCT / EP2012 / 052123, filed Feb. 8, 2012, which designated the United States; this application also claims the priority, under 35 U.S.C. §119, of German Patent Application DE 10 2011 010 641.3, filed Feb. 9, 2011; the prior applications are herewith incorporated by reference in their entirety.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to an injector for a urea-water solution, with which a urea-water solution can be added, in particular, to exhaust gas systems of motor vehicles. In particular, the injector is used to add liquid urea-water solution in a precisely metered manner to the exhaust gas of an internal combustion engine. It is then possible for the process of selective catalytic reduction (SCR) to be carried out in the exhaust gas system in such a way that nitrogen oxides contained in the exhaus...

Claims

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Application Information

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IPC IPC(8): F01N3/20
CPCF01N3/2066F01N2260/024F01N2610/02F01N2610/1453Y02A50/20Y02T10/12Y10T137/9029F01N3/20F01N2610/14
Inventor DIOUF, CHEIKH
Owner EMITEC GESELLSCHAFT FUR EMISSIONSTECHNOLOGIE MBH
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