DE102008011441A1 - Device for fastening an exhaust element to the internal combustion engine of a motor vehicle - Google Patents

Abstract

The invention relates to a device (5) for fastening an element for exhaust gas purification on the internal combustion engine of a motor vehicle, comprising an exhaust system connected to this motor, said device (5) comprising at least one means (6, 6A) for fixing said element Exhaust gas purification on the engine includes. This device (5) is characterized in that it further comprises at least one means (7) for thermal insulation of at least a portion of said exhaust gas purification element (4) and at least one means (8) for securing a means (7) for insulation to connect a fastening means (6, 6A).

Description

The The present invention relates to an attachment device an exhaust element to the internal combustion engine of a motor vehicle.

These The invention relates to the field of the automotive industry, in particular the field of manufacturing equipment for that are provided, the outflow of the combustion a fuel originating in the interior of an internal combustion engine To ensure gases.

A Such exhaust equipment usually arises in the form of an exhaust system attached to the outlet of the engine is connected and is formed by a plurality of exhaust elements, of which a manifold and at least one element for Environmental protection against pollution, such as a catalyst and / or particulate filter, usually connected by pipes or sections of exhaust pipes are.

In In this respect, one will observe that this exhaust system with the engine mainly by the attachment of the manifold is firmly connected to this engine, and in addition even by attaching an element for exhaust gas purification of the above mentioned type of this engine.

Around To do this, it is known on at least one fastening tape on the one hand firmly connected to the engine and on the other hand contracted around the element for exhaust gas purification in order to ensure adherence to the engine.

It will be observed that this element is used for emission control located near the outlet of the engine, so, that the exhaust gases that flow through it are a special one have high temperature.

It is also known, this element for exhaust gas purification by means to complement the thermal insulation, this element for exhaust gas cleaning at least partially surrounded to either the heat to keep inside the exhaust system in terms of environmental protection to optimize against pollution or too high a temperature on the body of this element to avoid exhaust gas purification in view of this, operational safety in the area of this element to guarantee exhaust gas purification, or to avoid the use of thermal Avoid shields that are intended to be opposite the temperature of the engine compartment sensitive elements to protect.

These Means for thermal insulation are usually in the form of a non-woven fabric, over and around the Element is arranged around the exhaust gas purification and of a thin sheet metal completed, which is placed over this fleece becomes. Such thermal insulation means become on the element for exhaust gas purification either by means of tabs, the thin Surrounded by metal, or by welding or flanging this thin sheet to the body of the element held for exhaust gas purification.

This Element for exhaust gas purification, using these means of isolation must now also be firmly connected to the engine, what guaranteed by means of above-mentioned fastening straps is placed over this thin sheet metal become.

In In this respect, one will observe that the nonwoven fabric of this Means for insulation and the thin sheet of deformable Texture are such that at the merger of the element for exhaust gas cleaning with the engine, the tightening of such a band on the one hand to a compression of this fiber fleece leads and significantly reduces its insulation performance and causes damage to it, and on the other hand to a weak adherence that is no longer guaranteed of the exhaust gas purification element with respect to the engine, and a suitable attachment of this element for exhaust gas purification at this Motor prevented.

A Solution is to be on the surface of the element to install emission control zones that do not have means of isolation and in the area of the fastening straps and the tabs are arranged. This solution is difficult in practice, especially as they lead to a considerable Loss of insulation performance of the exhaust gas purification element and the loss of the operational safety guarantee leads.

The The present invention contemplates the disadvantages of the devices of the prior art.

To For this purpose, the invention relates to a device for attachment an element for exhaust gas purification on an internal combustion engine of a motor vehicle, which includes an exhaust system connected to this engine is, this device at least one means for fixing this Comprises element for exhaust gas purification on the engine, characterized that this device still at least one means for thermal insulation at least a portion of this element for exhaust gas purification and at least one means for securing a means of isolation to connect with a fastener.

One Another feature is that the fastening means at least partially integrated and / or designed with insulation means is to switch between the element for exhaust gas purification and such Insulating agent to be inserted.

One additional feature concerns the fact that the fastener is formed by a band, a flange, a tab or analog and designed to, on the one hand firmly with the engine to be connected and on the other hand at least partly to be able to surround the element for exhaust gas purification. This fastener still includes a means for its Clamping around the element for exhaust gas purification.

Indeed on the one hand, the fastening means comprises at least two clamps, each having at least one free end, and on the other hand at least a means of connecting, even approaching the free ends of these pieces in terms of attachment of the element for exhaust gas purification.

One Another feature is that the means for the isolation of a shell is formed, designed for it is at least a part of the element for exhaust gas purification to be able to be arranged, and which has a longitudinal opening, which is completely over the length of this shell extends, and is designed to move from the element penetrated to the exhaust gas purification during its attachment or removal to become.

Indeed takes such a shell in the form of a housing which is formed by at least two shell sections, wherein each fixed to at least one part of the fastener Means of merger is connected.

One additional feature concerns the fact that the shell of two substantially parallel plates and of one layer is formed, which is formed by an insulating material and inserted between these two plates, in particular For example, are firmly connected by butt welding.

One Another feature is that the means for isolation at least an opening for reaching through the means for clamping has, even for reaching through a tool for handling / actuation this means of tightening.

After all is the means to merge either from a means to good attachment of a means for isolation to a fastener or of a means for integrating at least a part of a Fastener be formed in a means for isolation.

The Advantages of the present invention are that the fastening device itself at least one means for isolating the exhaust gas purification element comprising, this means for isolation with at least one Means for fixing this element to the exhaust gas purification at the Motor is firmly connected.

The Arrangement of these means for attachment and insulation allows it advantageously, a suitable attachment of the element to ensure exhaust gas purification on the engine, while still ensures a suitable isolation of this element for emission control becomes.

A Such arrangement also allows advantageous Way and at the same time in the attachment of the element for emission control on the engine attachment of this means for isolation at this Agent for exhaust gas purification.

Furthermore This device is designed to help with the removal of a such element for exhaust gas purification (in particular with regard to its complete or partial replacement), the removal of the fastener and to allow the removal of the means for isolation at the same time.

In In this respect, it will be observed that such an element for Exhaust gas purification usually takes the form of a housing Adopting substrates that environmental protection against pollution guaranteed and designed to be exchanged to become. The fastening device according to the Invention now advantageously allows for expansion the element for exhaust gas purification, the removal of the fastener and the means of isolation, which makes it possible to Element for exhaust gas purification with regard to the opening of the enclosure to have access to the substrates to have their exchange.

One Another advantage is that through the use of the fastening device according to the invention, the assembly of this element For exhaust gas purification on the engine and its expansion as particularly easy true.

The means for isolation takes the form of a shell which extends over a large part (even over the major part) of the element for exhaust gas purification, which advantageously enables a uniform temperature over (almost) the entire body of this element for exhaust gas purification, especially in the field of fasteners (insulating layer, which is above this fastener holding means is arranged), without deteriorating its attachment or to prevent the installation / removal of the element for exhaust gas purification.

One such insulation means also makes it possible the engine environment in case of leakage of exhaust gases in the area of fastening straps to protect.

Further Objects and advantages of the present invention appear in the course the following description, referring to embodiments refers only as indicative and non-limiting examples are indicated.

The Understanding this description will be facilitated by referring to the annexed drawings becomes, in which:

1 a schematic and perspective view of the device for fastening according to the invention from below;

2 is a schematic and perspective view of the device for fastening according to the invention from above;

3 is a view that is similar to the preceding and corresponds to the fastening device that receives an element for exhaust gas purification for its attachment to a (not shown motor).

The The present invention relates to the field of manufacturing equipment, which are intended to the outflow of the from the combustion of a fuel inside an internal combustion engine to ensure originating gases.

Such exhaust equipment arises in particular in the form of an exhaust system 1 comprising a plurality of exhaust elements 2 which are usually connected by pipes 3 . 3 ' or sections of exhaust pipes are connected.

In this regard, one will observe that such an exhaust element 2 can be formed by a manifold which is connected directly to the outlet of the engine, or by an element for exhaust gas purification 4 , in particular a physical and / or chemical element for exhaust gas purification, such as a catalyst, a particulate filter or the like.

Such exhaust equipment can now also be in the form of a device 5 represent, which is adapted to the attachment of such an exhaust element 2 an exhaust system 1 to ensure the combustion engine.

Actually and in the course of the description will be particularly to a device 5 Reference is made to the attachment of an element 4 to ensure exhaust gas purification on the engine, in particular on the cylinder housing containing such a motor.

According to the invention, this fastening device comprises 5 on the one hand at least one means 6 . 6A for fixing this element 4 for exhaust gas purification on the engine, on the other hand, at least one agent 7 for thermal insulation of this element 4 for exhaust gas purification and on the other hand at least one agent 8th to such a means of isolation 7 firmly with such a fastener 6 . 6A connect to.

As in the 1 and 2 can be seen, takes such a fastener 6 the shape of a ribbon 9 , a tab, a clamp or analog.

Such a means is designed to be able to be firmly connected to the engine on the one hand, and on the other hand, at least partially, the element for exhaust gas purification 4 to be able to surround.

In addition, this includes fasteners 6 another means 10 for its tightening around this element for emission control 4 ,

Actually, and according to a preferred embodiment of the invention shown in the attached figures, such a fastening means comprises 6 on the one hand at least two clamps 11 . 11 ' , which are designed to be firmly connected to the motor can, and each having at least one free end 12 . 12 ' exhibit.

Especially between these two clamps 11 . 11 ' becomes the element for exhaust gas purification 4 arranged with regard to its attachment to the engine. EP 04 732 241.7-2318

INITIUM AKTIENBOLAG

For this purpose, it is convenient to note that this fastener 6 two clamps 11 . 11 ' according to a preferred embodiment of the invention shown in the accompanying figures.

Each of these clamps 11 . 11 ' can be formed by a different organ and be individually connected to the engine. Nevertheless, and according to one in the 1 and 2 apparent preferred embodiment, these two clamps 11 . 11 ' in the area of the same organ (Vol 9 , Flange, tab or the like), which is a fastener 6 forms and firm connected to the engine.

On the other hand, this fastening means 6 at least one remedy 13 for connecting the free ends 12 . 12 ' these two clamps 11 . 11 ' , with regard to the attachment of the element for exhaust gas purification 4 on the engine.

In this regard, one will observe that such a connecting agent 13 is preferably reversible, such that on the one hand, and by having two clamps 11 . 11 ' connects, the attachment of the element for emission control 4 on the engine, and on the other hand, and by making these two clamps 11 . 11 ' disconnects, the release of the element for emission control 4 and its removal, in particular with regard to its replacement.

Such a connection means 13 can by a through a with a clamp 11 linked festhakmittel and are formed by a complementary Festhakmittel, with the other clamp 11 ' linked and designed to with the Festhakmittel with regard to the attachment of the element for emission control 4 to work together

However, according to a preferred embodiment shown in the attached figures, this connecting means 13 be formed by a means adapted to approximate the free ends 12 . 12 ' these clamps 11 . 11 ' to ensure such a rapprochement means that the clamps 11 . 11 ' on the element for exhaust gas purification 4 be tightened.

advantageously, Such approach means can be provided by a screw-nut system or analogue.

In this regard, it will be observed that this approach means the free ends 12 . 12 ' two clamps 11 . 11 ' of the fastener 6 now a lanyard 13 from the above-mentioned kind, however, also a means 10 for tightening the fastener 6 of the element for exhaust gas purification 4 represents at the engine.

As mentioned above and according to a further feature of the invention, the device comprises 5 at least one means of isolation 7 of the element for exhaust gas purification 4 ,

Such a means of isolation 7 takes the form of a shell 14 which is designed to at least a part of the element for exhaust gas purification 4 , In particular, a part of the scope of this element for emission control 4 to be able to be arranged.

Basically, and as it is in 3 can be seen, is such an element for emission control 4 usually in the form of a tubular body (of circular, oval or similar cross-section), the ends of which are enclosed by a cup or the like. The case 14 of the insulating agent 7 is also designed to extend over at least part (and even preferably the entirety) of the length of this tubular body.

As can be seen in the attached figures, such a shell has 14 a longitudinal opening 15 on, extending over the entire length of this shell 14 extends.

This opening 15 is designed, on the one hand by the element for exhaust gas purification 4 be penetrated during insertion and / or during its removal (in particular with regard to its replacement).

On the other hand, this opening 15 designed to be wrapped around the shell 14 to the element for exhaust gas purification 4 order, and his task of isolating the latter 4 to ensure. Basically, and as will become apparent from the following description, the closure of this opening becomes 15 at least partially in the activation of the fastener 6 (In particular the means for tightening 10 ) of the element for exhaust gas purification 4 be guaranteed.

As can be seen in the accompanying figures, such a shell takes 14 the shape of a case 16 at least two shell sections 17 . 17 ' is formed.

At least one of these shell sections 17 . 17 ' (but preferably the entirety of these shell sections 17 . 17 ' ) is (are) of a movable type and is (are) designed to provide, on the one hand, a first position (closed aperture 15 ) in which this shell section (s) is close to (even in contact with) the exhaust gas purification element 4 arranges to ensure the insulation, and on the other hand, at least a second position (opened opening 15 ) in which the opening 15 this shell 14 the passage of this element for emission control 4 allows.

An additional feature is that each of these shell sections 17 . 17 ' with at least a part of a fastener 6 connected by means of at least one of the above-mentioned funds for the merger.

Such an embodiment advantageously enables the arrangement on the element for exhaust gas purification 4 and the removal of the latter 4 on the one hand by at least one means of isolation 7 and on the other hand at least one fastening means 6 at the same time and in a single operation, without either the attachment or the insulation of the exhaust gas purification element 4 to impair.

Basically, and according to a preferred embodiment, each shell section 17 . 17 ' firmly with a clamp 11 . 11 ' who use this fastener 6 includes, connected.

As can be seen in the attached figures, the shell becomes 14 preferably of two shell sections 17 . 17 ' formed, each forming a half-shell according to a preferred embodiment.

In Advantageously, these two half-shells can be symmetrical be, yes even (and preferably) identical, such that they are interchangeable and / or only a single tool for production need.

In this regard, one will observe that each of these two shells 17 . 17 ' Now firmly with one of the clamps 11 . 11 ' connected to the fastener 6 comprises, by means of at least one means of fusion 8th ,

As mentioned above, the means of isolation 7 according to the present invention of a shell 14 educated.

This shell 14 , in particular each shell section 17 . 17 ' (in particular, every half shell) of this shell 14 , is made up of two essentially parallel plates 18 . 18A and formed by a layer which is inserted between these two plates and is formed by an insulating material, in particular a fleece of insulating fibers.

In this regard, one will observe that one of these plates 18 . 18A (but preferably these two plates 18 . 18A ) is made of a metallic material with a small thickness, in particular made of thin sheet metal.

A first embodiment is that such a plate 18 . 18A is of a smooth design, but according to a preferred embodiment of the invention is such a plate 18 . 18A provided with ribs in order to facilitate the formation of such a plate, in particular by deep drawing.

As can be seen in the attached figures, such a casing comprises 14 (yes, even a bowl section 17 . 17 ' ) basically an inner plate 18 pointing in the direction of the element for emission control 4 and to the inside of this shell 14 limited volume, which is intended to be in the vicinity (yes even partially in contact) of this element for emission control 4 to position, and firmly with a fastener 6 by at least one means of consolidation 8th connected is.

This inner plate 18 is now adjusted so that they on the one hand to the shape of the element for exhaust gas purification 4 adapts, and on the other hand with the fastener 6 interacts.

According to another feature, this inner plate 18 at least one rib, each with a fastener 6 is linked. Such a rib is bounded on both sides by a groove which is designed to be between the element for exhaust gas purification 4 and the inner plate 18 to define an air gap.

This shell 14 (yes, even a bowl section 17 . 17 ' ) also includes an outer panel 18A leading to the outside of the fastening device 5 is directed and so adapted to the environment of this device 5 adapt.

However, according to a preferred embodiment, this outer plate 18A one to that of the inner plate 18 identical shape on, such that these plates 18 . 18A are interchangeable, even need only a single tool for production.

A preferred embodiment is that these plates 18 . 18A For example, are firmly connected by butt welding.

According to an additional feature and as seen in the accompanying figures, the means for isolation 7 at least one opening 19 on for the passage of the means for clamping 10 , yes even to the passage of a tool for handling / operating this means for clamping 10 ,

Such an embodiment advantageously makes it possible to assemble (by attachment) the exhaust gas purification element 4 To ensure the engine and its disassembly in a particularly convenient manner, and that by focusing on the means for clamping 10 which is the means of isolation 7 permeates or through this latter 7 is accessible, and thus from outside the fastening device 5 ,

As mentioned above, the fastening device comprises 5 at least one remedy 8th which is designed to be a means of insulation 7 firmly with a fastener 6 connect to.

According to a first, in the 1 and 2 illustrated embodiment, such a means for merger 8th formed by a means that is designed to be a means of isolation 7 (especially the inner plate 18 this means of isolation 7 ) with a fastener 6 good to attach.

One such means for good attachment can be from a rivet, a Glue, a clip, a hook, a flare connection or otherwise, but is preferably of a weld educated.

In a similar case, the fastener 6 between the means of isolation 7 and the element for exhaust gas purification 4 inserted.

According to another embodiment, not shown, however, such a means of association 8th be formed by a means to at least a part of a fastener 6 with a means of isolation 7 to integrate.

In this regard, it will be observed that such integrating means are shown in the form of at least two openings formed in the means for isolation 7 (especially in the inner plate 18 ) and are adapted to move from this fastener 6 to be penetrated. This latter 6 now penetrate into the interior of this means of isolation 7 through a first opening and thus through a second opening. Outside of this means of isolation 7 can at least a part of the fastener 6 (especially in the vicinity or in the area of the means for tightening 10 ) between the element for exhaust gas purification 4 and a means of isolation 7 be inserted.

Finally, the fastening device 5 according to the invention, a carrier 20 include, which is intended to the motor by means of at least one fastening member 21 to be attached, and to the 20 the exhaust element 4 by means of at least one fastening element 6 is attached.

So is the attachment of this element for emission control 4 on this carrier 20 and the attachment (in advance) of this carrier 20 On the engine basically the attachment of this element for emission control 4 ensured at the engine.

As it is in the 1 and 2 it can be seen, the one or more fastening means are fixed to this carrier 20 connected. In particular, such a fastener can 6 at least partially around the wearer 20 position and / or at least partially with this 20 be integrated.

This carrier 20 can still funds 22 include, which are intended to the positioning of the element for exhaust gas purification 4 in relation to this carrier 20 to ensure.

Such means of positioning 22 take the form of a wedge or similar.

One will observe that the fastening device 5 According to the present invention, it is possible to overcome the above-mentioned disadvantages of the prior art devices.

This fastening device 5 makes it possible by using a means of isolation 7 with the above features advantageously, the temperature over the entire body of the element for emission control 4 too comparable, without affecting the attachment of this latter to the engine.

In addition, and according to another advantage, this fastening device allows 5 a convenient installation and removal of the element for emission control 4 on the engine and its insulation in a suitable manner.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 04732241 [0045]

Claims (15)

Contraption ( 5 ) for fixing an element ( 4 ) for exhaust gas purification on the internal combustion engine of a motor vehicle having an exhaust system ( 1 ) which is connected to this motor, this device ( 5 ) at least one means ( 6 . 6A ) for fixing this element ( 4 ) for exhaust gas purification on the engine, characterized in that this device ( 5 ) at least one remedy ( 7 ) for thermal insulation of at least a portion of this element ( 4 ) for exhaust gas purification and at least one agent ( 8th ) to provide a means of isolation ( 7 ) fixed with a fastener ( 6 . 6A ) connect to. Fastening device ( 5 ) according to claim 1, characterized in that the fastening means ( 6 . 6A ) at least partially with a means for isolation ( 7 ) is integrated and / or adapted to move between the element for exhaust gas purification ( 4 ) and such means for isolation ( 7 ) to be inserted. Fastening device ( 5 ) according to one of the preceding claims, characterized in that the fastening means ( 6 . 6A ) from a band ( 9 ), a flange, a tab or the like and is designed to be connected on the one hand firmly to the engine, and on the other hand at least partially the element for exhaust gas purification ( 4 ) to be surrounded. Fastening device ( 5 ) according to one of the preceding claims, characterized in that the fastening means ( 6 . 6A ) means for tightening it around the exhaust gas purification element ( 4 ). Fastening device ( 5 ) according to one of the preceding claims, characterized in that the fastening means ( 6 . 6A ) on the one hand at least two clamps ( 11 . 11 ' ), each having at least one free end ( 12 . 12 ' ) and on the other hand at least one means ( 13 ) for connecting the free ends ( 12 . 12 ' ) of two of these clamps ( 11 . 11 ' ) with regard to the attachment of the element for exhaust gas purification ( 4 ). Fastening device ( 5 ) according to claims 4 and 5, characterized in that the means ( 10 ) is formed for clamping by a means that by a connecting means ( 13 ) and designed to prevent the free ends from approaching ( 12 . 12 ' ) of these clamps ( 11 . 11 ' ) of the fastener ( 6 . 6A ) to ensure. Fastening device ( 5 ) according to one of the preceding claims, characterized in that the means for isolation ( 7 ) from a shell ( 14 ), which is adapted to at least a part of the element for exhaust gas purification ( 4 ) and one longitudinal opening ( 15 ) which extends completely the length of this envelope ( 14 ) and adapted to be removed from the exhaust gas purification element ( 4 ) to be penetrated during its attachment or removal. Fastening device ( 5 ) according to claim 7, characterized in that the envelope ( 14 ) the shape of a housing ( 16 ) of at least two housing sections ( 17 . 17 ' ), each fixed to a part of the fastener ( 6 . 6 ' ) by at least one means for connecting ( 8th ) connected is. Fastening device ( 5 ) according to claims 5 and 8, characterized in that the envelope ( 14 ) of two half-shells ( 17 . 17 ' ), each fixed to one of the clamps ( 11 . 11 ' ) connecting the fastening means ( 6 . 6A ) by means of at least one means for connecting ( 8th ). Fastening device ( 5 ) according to one of claims 7 to 9, characterized in that the envelope ( 14 ) of two substantially parallel plates ( 18 . 18A ) and of a layer formed by an insulating material and between these two plates ( 18 . 18A ), which are particularly firmly connected, for example, by butt welding. Fastening device ( 5 ) according to claim 10, characterized in that at least one of these plates ( 18 . 18A ) made of a metallic material with a small thickness, in particular of thin sheet metal, which is preferably provided with ribs. Fastening device ( 5 ) according to one of claims 4 or 6, characterized in that the means for isolation ( 7 ) at least one opening ( 19 ) for reaching through the means for tightening ( 10 ), even to reach through a tool for handling / operating this means for clamping ( 10 ). Fastening device ( 5 ) according to one of the preceding claims, characterized in that the means of concentration ( 8th ) of a means for securing a means for insulation ( 7 ) to a fastener ( 6 . 6A ), in particular of a rivet, a splice, a clip, a hook, a flare, and preferably is formed by a weld. Fastening device ( 5 ) after one of the Claims 1 to 12, characterized in that the means of concentration ( 8th ) is formed by a means to at least a part of a fastening means ( 6 . 6A ) with a means for isolation ( 7 ) to integrate. Fastening device ( 5 ) according to one of the preceding claims, characterized in that it comprises a support ( 20 ), which is intended to be attached to the engine, and on which the element for exhaust gas purification ( 4 ) by means of at least one fastening element ( 6 . 6A ) is attached.