Exhaust system for diesel vehicles

a technology for exhaust systems and diesel vehicles, applied in the direction of exhaust treatment, flanged joints, mechanical devices, etc., can solve the problems of inability to rotate the two pipe sides with respect to each other, and achieve the effect of reducing the thickness of the fa

Inactive Publication Date: 2015-04-02
DEUTZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019]It is advantageous that the flange torsion may occur flexibly, the axial compression of the seal taking place in such a way that an optimum contact pressure is implemented as well as a sealing of the system against AdBlue and exhaust gas.
[0020]A further advantage in the case of loose flanges and blind flanges exists if, instead of the standard flange face thickness, a face thickness which meets the particular requirements, i.e., a reduced face thickness, is used. A uniform force distribution / precisely defined introduction of force on the sealing area is possible.

Problems solved by technology

These connections have the disadvantage that the torsion of the two pipe sides with respect to each other is not possible at all (welded connection) or is possible only in keeping with the flange pattern (screw connection).
This is unsuitable when there is limited installation space.

Method used

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  • Exhaust system for diesel vehicles
  • Exhaust system for diesel vehicles
  • Exhaust system for diesel vehicles

Examples

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Embodiment Construction

[0027]The present invention illustrates a screw connection, which facilitates the adjustment of the two pipes with respect to each other prior to tightening the screws, in any arbitrary angular position and thus independently of the hole pattern of the screw flange.

[0028]Flexible flange connection 9 (FIG. 4) is “AdBlue-tight”; tight against DEF, AUS 32 according to ISO 22241, and tight against all common fuels and their condensates as well as tight against all exhaust gases from internal combustion engines.

[0029]The flange connection illustrated in FIG. 1 is a screw connection between two pipes 1, 8. One pipe side 8 is fixedly welded to a flange or flange face 4. The mating side permits the free torsion of pipe 1, due to a loose flange 2, and thus a variable adjustment independently of the hole pattern of the flange. Following the desired adjustment of the two pipes 1, 8 with respect to each other, flanges 2, 4 or flange faces are screwed to each other. Seal 3 is pressed between the...

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PUM

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Abstract

An exhaust system for diesel vehicles is described, which includes at least one metering device for introducing and metering a pollutant-reducing medium into an exhaust gas flowing through a flow pipe of an exhaust tract of an internal combustion engine, in particular for the purpose of introducing a reduction agent and/or a reduction agent precursor, for example urea and/or an aqueous urea solution, the exhaust tract having at least one flexible flange connection.

Description

[0001]This claims the benefit of German Patent Application DE 10 2013 016 235, filed Oct. 1, 2013 and hereby incorporated by reference herein.[0002]The present invention relates to an exhaust system for diesel vehicles, which includes a flexible flange. Flanges are used in a method for connecting pipe sections or air ducts to each other tightly yet detachably. The contact pressure of the ring-shaped sealing surfaces on the intermediate seal is crucial for the tightness. The contact pressure is applied with the aid of screws which are inserted into the flange faces through bores. These flanges are generally welded to the pipe. They belong to the pipeline parts or fittings. For example, flanges of this type are cast onto fittings and measuring devices. For example, steel flanges, cast iron flanges, flanges made of copper alloys and flanges made of aluminum alloys are known. Flanges made of high grade steel or carbon steel types are also known.BACKGROUND[0003]The word flange means “to ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01N3/20F01N3/28
CPCF01N3/28F01N3/208F01N3/2066F01N13/1811F01N13/1816F01N13/1855F01N2610/02F16L23/026F16L23/0283F16L23/18Y02A50/20
Inventor PISTER, MANFREDOHMANN, JOERN
Owner DEUTZ AG
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