A microstructure relieved of notching

A technology of microstructure and surface structure, applied in physical/chemical process catalysts, machines/engines, transportation and packaging, etc., can solve problems such as high stagnation pressure, obstructed exhaust gas, channel blockage, etc., and achieve material stress reduction and crack resistance The effect of extending the reduction

Inactive Publication Date: 2006-07-05
EMITEC EMISSIONSTECHNIK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Corrugation leads, for example, to clogging of the channels in some cases or to the formation of cracks which propagate due to the high thermal and dynamic loads in the exhaust system of automobiles, thus compromising the structural integrity of the honeycomb body
Furthermore, it has to be taken into account that such corrugated or deformed primary and / or secondary structures impede the exhaust gases in an undesired manner and can thus cause high stagnation pressures upstream of the honeycomb body, which can sometimes lead to a loss of engine power

Method used

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  • A microstructure relieved of notching
  • A microstructure relieved of notching
  • A microstructure relieved of notching

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0064] FIG. 1 shows a schematic perspective view of a part of a thin plate 1 with a microstructure 4 . In this partial view shown, the sheet metal 1 includes a microstructure 4 partially delimited by two slits 2 , the slits 2 extending only in the inner region 3 of the sheet metal 1 . The microstructures 4 protrude from the surface structures 5 of the sheet metal 1 . The surface structure 5 is made with crests 9 and troughs 10 . As shown, the edge area 6 of the slit 2 is below Figure 2.1 , 2.2 and 2.3 are shown enlarged.

[0065] Figure 2.1 , 2.2 and 2.3 show a partial view of the microstructure 4 defined by the slit 2 . Slits 2 allow microstructures 4 to be formed from sheet metal 1 in such a way that they protrude beyond surface structure 5 . Among them in Figure 2.1 The central edge region 6 is shown as a simple slot 2 , ie without the recess 7 according to the invention. The point junction in the edge region 6 forms a gap, so that further expansion of the slit 2 i...

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Abstract

The invention relates to a thin metal sheet (1) comprising at least one slit (2) that is located in an inner region (3) of the thin metal sheet (1) and at least partially defines a microstructure (4) created on the thin metal sheet (1) and protruding out of a surface structure (5) thereof. Said thin metal sheet is characterised in that the at least one slit (2) has a recess (7) in at least one edge region (6). The invention also relates to a carrier body (21) for a component used to purify exhaust gases, said carrier body comprising a plurality of at least partially structured thin metal sheets (1) that are stacked and / or wound up in such a way that a fluid can flow through the same, at least one of said thin metal sheets (1) being embodied as above.

Description

technical field [0001] The invention relates to a sheet, in particular for use as a substrate for a catalytically active material for purifying the exhaust gases of a motor vehicle internal combustion engine, the sheet comprising at least one slit extending only into the inner region of the sheet and at least partially delimiting from the surface structure of the sheet Microstructure of protruding sheets. Background technique [0002] In the exhaust gas treatment of internal combustion engines of vehicles, such as gasoline engines and diesel engines, it is known to arrange elements or structures providing a relatively large area in the exhaust tract. The elements are usually provided with an adsorptive, catalytically active or similar coating, whereby an intimate contact with the exhaust gas flowing through is achieved due to the large surface area of ​​the elements. These elements are, for example, filter elements for filtering particles contained in the exhaust gas, adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/04F01N3/28B21D13/04B21D35/00
CPCF01N2330/32Y10T428/1234Y10T428/24281Y10T428/1241F01N3/2814B21D13/04F01N3/2821F01N2330/44Y10T428/12361B21D35/00F01N2330/02Y10T428/12368B01J35/04Y02A50/20F01N3/28
Inventor J·霍格森
Owner EMITEC EMISSIONSTECHNIK
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