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Method for the production of an exhaust gas conducting device

A waste gas treatment equipment and equipment technology, applied in mechanical equipment, exhaust devices, air quality improvement, etc., can solve problems such as limiting stability

Inactive Publication Date: 2011-02-09
FAURECIA EMISSIONS CONTROL TECH GERMANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to this, the reduced pressure to hold the support pads in place while working (for example due to ageing) leads to the fact that initially the pressure needs to be increased even more to ensure that the matrix is ​​later reliably clamped in place in the housing, Tensioning of each matrix limits its stability

Method used

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  • Method for the production of an exhaust gas conducting device
  • Method for the production of an exhaust gas conducting device
  • Method for the production of an exhaust gas conducting device

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0042] now refer to figure 1 , showing an automotive exhaust treatment device in the form of an emission control device. The emission control device is an exhaust gas catalytic converter or a diesel particulate filter or a combination of both.

[0043] The heart of the emission control device is an elongated cylindrical base body 10 comprising, for example, a ceramic base or a wrapping corrugated plate or some other catalyst base material or filter material with or without coating. The base body 10 may have a generally cylindrical cross-section or a non-circular cross-section, which is shown as a conventional cylindrical cross-section only for reasons of simplicity of explanation. The base body is surrounded by a support pad 12 serving as an elastic compensating element between the base body 10 and the housing 14 . The housing 14 is manufactured with very thin walls and in particular from sheet metal. Connected upstream and downstream of housing 14 are inlet tube 16 and out...

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Abstract

Disclosed is a method for producing an exhaust gas conducting device, especially an exhaust gas purifying device for a vehicle. According to said method, an insert which is composed of a substrate (10) and a support mat (12), for example, is tested regarding the specific elasticity thereof before being clamped in an outer housing (14). In order to do so, a pressure is applied to the insert from outside in a test station. The amount of deformation of the insert by which the insert should be clamped in the outer housing (14) is determined via the applied pressure and the displacement path of the measuring tool. The insert is then mounted in an outer housing (14) whose interior dimensions match the previously determined, desired outer dimensions of the insert at the desired compression.

Description

technical field [0001] The present invention relates to a method of manufacturing exhaust gas treatment devices, in particular emission control devices, each comprising a housing with an insert suitably sandwiched therein. Background technique [0002] Exhaust gas treatment devices to which the invention relates are, for example, mufflers, in particular emission control devices such as catalytic converters and diesel particulate filters. [0003] Housed within these devices are inserts, which are highly sensitive to radial pressure, essentially comprising a ceramic matrix surrounded by an elastic compensating element, for example in the form of a gasket. These inserts are held in place, both axially and laterally where possible, simply by being properly clamped in the radial direction, so that the clamping effect must be sufficient so that the inserts are not affected by gas pressure and vehicle operation. The vibration in the shaft moves out of the proper position in the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N13/18F01N3/28
CPCF01N13/18F01N2450/02F01N3/2853Y10T29/49345Y10T29/49398Y10T29/49863Y10T29/49872Y10T29/49895Y02A50/20F01N3/28
Inventor 彼得·克罗纳
Owner FAURECIA EMISSIONS CONTROL TECH GERMANY