DE102004035495A1 - Automobile exhaust silencer comprises an absorption pot with a housing incorporating a plastic top , and a distributer pipe which is located in the housing and is joined to the exhaust inlet and outlet pipes - Google Patents

Abstract

The automobile exhaust silencer (1) comprises an absorption pot (3) with a housing (2) incorporating a plastic top (6), and a distributer pipe which is located in the housing and is joined to the exhaust inlet and outlet pipes (4, 5) so that the housing is jointly carried by them. Independent claims are also included for: (A) an automobile exhaust system with the proposed silencer; (B) a motor vehicle with with the proposed silencer; (C) a method for producing the proposed silencer (D) an application of shaped components for production of the proposed silencer.

Description

The The present invention relates to an automotive exhaust muffler and an automobile exhaust system and a motor vehicle with it, method for Production of such an automobile exhaust silencer and a use of moldings for an automobile exhaust muffler according to the preambles of the respective independent claims.

conventional exhaust silencer for automobiles usually contain casing of metal, in particular of steel. The disadvantage here is the high Weight of about 11 kg for a medium exhaust silencer. This is not just for the driving performance, but also for the fuel consumption of Automobiles disadvantageous, which is why lightweight construction in the automotive industry essential objective is, especially where stability and safety of the automobile is not affected by the lightweight construction.

Farther are the shaping possibilities of metal casings very limited under the aspect of a rational production, so that only simple forms e.g. with round or oval cross-section possible are. Thus, they are also in terms of achieving one geünschten Volume, which is known for one desired sound insulation important, severely limited, as a certain distance of the muffler or damping pot Be ensured to the vehicle floor must, what the possibilities with the usual simple ones Shapes severely limited. It then either has to be under a vehicle floor, where exhaust mufflers usually do be mounted, a big one Free space can be provided to a suitable size of one exhaust silencer for its sufficient sound insulation to accommodate or need it several damping pots in an exhaust system be used, or it is just not achieved good sound insulation.

at Sports cars also play lightweight strategies even more important as in conventional motor vehicles, not just the increasing Resource conservation of approx. 0.3-0.7 L / 100km is the focus, but especially the sporty driving characteristics are important the weight, the aerodynamics, the wind noise and other noises embossed become.

The The present invention therefore has the object, the above from the Practice known disadvantages, especially in terms of weight and sound insulation remedy.

This Target is with an automobile exhaust muffler and an automobile exhaust system and a motor vehicle therewith, a method for producing a such automotive exhaust muffler and a use of moldings for an automotive exhaust muffler according to respective independent claims created.

The Invention thus provides an automobile exhaust muffler an exhaust gas inlet and an exhaust gas outlet and an intermediate Damping pot wherein the damping pot a casing with a plastic upper part facing the underbody when mounted on a motor vehicle and a lower part, which are connected to each other, and wherein the damping pot further comprises a in the housing extending throughput distribution line contains on the one hand with the exhaust gas supply line and on the other hand with the exhaust gas discharge connected so that the housing from the composite exhaust gas supply, feedthrough distribution line and exhaust gas discharge will be carried.

It According to the invention is an automobile exhaust silencer, wherein the case of the damping pot at least one housing part Plastic contains. By the use of plastic, which can be formed well, is it possible that casing the damping pot in almost any shape. Compared to conventional housings of damping pots of metal, only in simple forms (for example, with a round or oval cross-section) can be trained is with the case the damping pot the automobile exhaust silencer according to the invention, for example adapting the shape to the shapes, e.g. bumps a vehicle floor possible, which in turn increases the muffler volume and therefore the sound insulation allows.

In addition, will Through the use of plastic a reduction in weight is achieved.

• – Die Abgaszuleitung kann mit der Abgasableitung mittels der Durchführverteilungsleitung zumindest im wesentlichen starr verbunden sein, wobei weiter vorzugsweise die Abgaszuleitung mit der Durchführverteilungsleitung und/oder die Durchführverteilungsleitung mit der Abgasableitung einstückig ausgebildet oder verschweißt sein kann.
• – Die Abgasableitung kann ein Endrohr einer Automobilauspuffanlage sein.
• – Zur Anbringung des Automobil-Abgasschalldämpfers an einem Kraftfahrzeug können Halterungen vorgesehen sein, die an der Abgaszuleitung, der Durchführverteilungsleitung und/oder der Abgasableitung angreifen.
• – Die Durchführverteilungsleitung können Durchlassöffnungen ins Innere des Gehäuses im übrigen in ihrer Wandung aufweisen, wobei ferner vorzugsweise die Durchführverteilungsleitung durch ein Lochrohr oder einen Lochrohrabschnitt gebildet ist oder einen Lochrohrabschnitt enthält. Ein solches Lochrohr ist bevorzugt jeweils stirnseitig mit einem Eingangsrohr als Abgaszuleitung und einem Auslassrohr als Abgasableitung vorzugsweise unlösbar verbunden, wie insbesondere durch Verschweissen. Das Auslassrohr, das Lochrohr und/oder das Eingangsrohr können/kann aber auch aus einem Teil gefertigt sein. Das Auslassrohr, das Lochrohr und/oder das Eingangsrohr können/kann wenigstens teilweise aus Edelstahl bestehen (z.B. 4301 Edelstahl), und/oder das Auslassrohr, das Lochrohr und/oder das Eingangsrohr können/kann wenigstens teilweise aus Titan bestehen, was eine weitere Reduzierung des Gewichtes mit sich bringt. Vorzugsweise ist das Auslassrohr ein Endrohr.
• – Die Abgaszuleitung und/oder die Abgasableitung und/oder die Durchführverteilungsleitung können hitzeisolierend beschichtet, vorzugsweise keramikbeschichtet, sein. Durch eine solche hitzeisolierende Beschichtung wird eine deutliche Reduzierung der Wärmeabstrahlung erreicht.
• – Im Inneren des Gehäuses des Schalldämpfers oder Dämpfungstopfes können Dämmmittel vorgesehen sein, wobei vorzugsweise die Dämmmittel Stahlwolle und/oder Edelstahlwolle und/oder Basaltwolle und/oder Glasfaserwolle enthalten, wobei bevorzugt Edelstahlwolle um ggf. das Lochrohr gewickelt und insbesondere mit diesem punktverschweißt ist.
• – Das Gehäuse kann Aussparungen zur Durchführung des Verbundes aus Abgaszuleitung, Durchführverteilungsleitung und Abgasableitung aufweisen. Dabei können ferner insbesondere zwischen den Aussparungen und dem Verbund aus Abgaszuleitung, Durchführverteilungsleitung und Abgasableitung Verbindungseinrichtungen vorgesehen sein, wobei weiter vorzugsweise die Verbindungseinrichtungen durch Dichtungen und/oder Hitzeisolationen gebildet sind, und wobei besonders bevorzugt die Dichtungen und/oder Hitzeisolationen ringartig sind und/oder Glasfasern, Teflon und/oder Asbest, bevorzugt Glasfasern, enthalten. Sind beispielsweise Dichtringe aus Glasfasern vorgesehen, kann sich das Rohrwerk im Schalldämpfer frei bewegen und es können trotz der unterschiedlichen Wärmeausdehnung beider Materialien Risse vermieden werden. Durch die genannten Dichtungen, die vorzugsweise hitzebeständig sind, kann ebenfalls die Wärmeabstrahlung verringert werden.
• – Das Unterteil ist ganz besonders bevorzugt ein Kunststoffunterteil. Vorzugsweise besteht das ganze Gehäuse des Dämpfungstopfes im wesentlichen, insbesondere ganz, aus Kunststoff. Zwar ist das Unterteil meist ein einfaches Teil mit einem flachen Boden, jedoch ist durch Verwendung eines Unterteils aus Kunststoff auch hier eine einfachere und kostengünstigere Optimierung der Form möglich. So kann ein Kunststoffunterteil leicht entsprechend der Form eines freien Einbauraumes unter dem Automobil in den Vertikalrichtungen ausgebildet werden. Ferner kann mit einem Kunststoffunterteil zusätzlich Einbauraum an der Unterseite des Automobils genutzt werden, indem beispielsweise Raum über anderen Fahrzeugkomponenten, d.h. Raum zwischen dem Fahrzeugboden und solchen anderen Fahrzeugkomponenten, durch die Formgebung des Kunststoffunterteils zur Optimierung des Schalldämmraumes des Automobil-Abgasschalldämpfers genutzt wird.
• – Das Kunststoffoberteil und/oder das Unterteil sind vorzugsweise schalenartig geformt.
• – Das bei Montage an einem Kraftfahrzeug dessen Unterboden zuzuwendenden Kunststoffoberteil ist bevorzugt in Anpassung an einen durch die Formgebung des Fahrzeugunterbodens definierten Einbauraum formgestaltet.
• – Das Kunststoffoberteil und/oder ggf. das Kunststoffunterteil enthält vorzugsweise mindestens einen Kunststoff aus der Gruppe bestehend aus Carbonfaserkunststoff, Glasfaserkunststoff, Aramidfasern und keramische Fasern, wobei weiterhin insbesondere ein mit einer Harzzusammensetzung behandelter Carbonfaserkunststoff enthalten ist, und wobei besonders bevorzugt eine mit einer hitzebeständigen Epoxidharzzusammensetzung bestehend aus Harz, Härter und Beschleuniger behandelten Carbonfaserkunststoff enthalten ist. Ein Beispiel einer keramischen Faser ist Nextel. Die genannten Kunststoffe sind besonders leicht und lassen sich beliebig formen. Zudem weisen die genannten Kunststoffe, insbesondere Carbonfaserkunststoff, den Vorteil einer hohen Zug-, Druck- und Biegefestigkeit auf.
• – Das Kunststoffoberteil und das Unterteil können durch Befestigungseinrichtungen insbesondere zumindest im wesentlichen gasdicht miteinander verbunden sein, wobei vorzugsweise die Befestigungseinrichtungen Flanscheinrichtungen und/oder Formschlussausgestaltungen jeweils an dem Kunststoffoberteil und dem Unterteil und/oder hitzebeständigen Klebstoff und/oder Nieten enthalten.
• – Das Kunststoffoberteil und/oder das Unterteil können/kann mit Verstärkungseinrichtungen ausgestattet sein, die vorzugsweise Verdickungen und/oder versteifende Formgebungen des Materials enthalten, und/oder für das Gehäuse können Verstärkungseinrichtungen vorgesehen sein, die vorzugsweise zumindest im wesentlichen formstabile Verstärkungsbänder, -spangen und/oder -klammern enthalten.

The following are preferred and / or advantageous further developments of the automotive exhaust muffler according to the invention indicated:

• - The exhaust gas supply line may be at least substantially rigidly connected to the exhaust gas discharge line by means of the feedthrough distribution line, more preferably, the exhaust gas feed line with the feedthrough distribution line and / or the feedthrough distribution line with the exhaust gas discharge line may be integrally formed or welded.
• - The exhaust gas discharge can be a tailpipe of an automobile exhaust system.
• - For attaching the automobile exhaust noise Damper may be provided on a motor vehicle mountings which engage the exhaust gas supply line, the feedthrough distribution line and / or the exhaust gas outlet.
• - The feed-through distribution line may have passage openings in the interior of the housing in the rest in its wall, further preferably the feed-through distribution line is formed by a perforated pipe or a perforated pipe section or contains a perforated pipe section. Such a perforated pipe is preferably connected to the end face preferably with an inlet pipe as an exhaust gas feed line and an outlet pipe as exhaust gas discharge inseparable, in particular by welding. The outlet tube, the perforated tube and / or the inlet tube can / but can also be made of one part. The outlet tube, the perforated tube, and / or the input tube may be at least partially made of stainless steel (eg, 4301 stainless steel), and / or the outlet tube, the perforated tube, and / or the input tube may be at least partially titanium, for further reduction of weight. Preferably, the outlet tube is an end tube.
• - The exhaust gas inlet and / or the exhaust gas outlet and / or the feedthrough distribution line may be heat-insulating coated, preferably ceramic coated, be. By such a heat-insulating coating, a significant reduction in heat radiation is achieved.
• - Insulating means may be provided inside the housing of the muffler or damping pot, wherein preferably the insulation means steel wool and / or stainless steel wool and / or basalt wool and / or fiberglass wool contain, preferably stainless steel wool is possibly wound around the hole tube and in particular spot welded to this.
• - The housing may have recesses for performing the composite of exhaust gas inlet, feedthrough distribution line and exhaust gas discharge. Furthermore, connecting devices may be provided, in particular between the recesses and the composite of exhaust gas feed line, feed-through distribution line and exhaust gas outlet, wherein preferably the connecting devices are formed by seals and / or heat insulation, and particularly preferably the gaskets and / or heat insulation are ring-like and / or glass fibers , Teflon and / or asbestos, preferably glass fibers. If, for example, sealing rings made of glass fibers are provided, the tube work in the silencer can move freely and cracks can be avoided despite the different thermal expansion of both materials. By the said seals, which are preferably heat-resistant, the heat radiation can also be reduced.
• - The lower part is very particularly preferably a plastic lower part. Preferably, the entire housing of the damping pot essentially, in particular completely, made of plastic. Although the lower part is usually a simple part with a flat bottom, however, by using a lower part made of plastic, a simpler and more cost-effective optimization of the shape is also possible here. Thus, a plastic lower part can be easily formed according to the shape of a free installation space under the automobile in the vertical directions. Further, with a plastic base additional installation space on the underside of the car can be used, for example, space above other vehicle components, ie space between the vehicle floor and such other vehicle components, is used by the shape of the plastic base to optimize the Schalldämmraumes the automobile exhaust muffler.
• - The plastic shell and / or the lower part are preferably shaped shell-like.
• - The plastic upper part to be turned over when mounted on a motor vehicle whose underside is preferably shaped in adaptation to an installation space defined by the shape of the vehicle underbody.
• The plastic upper part and / or optionally the plastic lower part preferably contains at least one plastic from the group consisting of carbon fiber plastic, glass fiber plastic, aramid fibers and ceramic fibers, wherein furthermore a particular treated with a resin composition carbon fiber plastic is contained, and more preferably one with a heat-resistant epoxy resin composition consisting of resin, hardener and accelerator treated carbon fiber plastic is included. An example of a ceramic fiber is Nextel. The plastics mentioned are particularly light and can be shaped as desired. In addition, the plastics mentioned, in particular carbon fiber plastic, have the advantage of high tensile, compressive and flexural strength.
• The plastic upper part and the lower part can be connected to one another in a substantially gas-tight manner by fastening devices, wherein the fastening devices preferably include flange devices and / or form-fitting configurations respectively on the plastic upper part and the lower part and / or heat-resistant adhesive and / or rivets.
• The plastic upper part and / or the lower part can / can be equipped with reinforcement devices, which preferably contain thickening and / or stiffening shapes of the material, and / or reinforcing means may be provided for the housing preferably at least substantially dimensionally stable reinforcing bands, braces and / or brackets included.

at a preferred embodiment the car exhaust unit according to the invention or the automobile exhaust silencer according to the invention the housing of the muffler of at least two, preferably two, connectable components, in particular from two positively and / or non-positively connectable shells, constructed, in particular, the vehicle floor facing component from Plastic is made, so this to the bumps of the vehicle floor is customizable. Due to the multi-part construction of the muffler housing is the manufacture of the car exhaust unit according to the invention greatly simplified.

Especially for mass production can of each according to the invention of plastic to be manufactured shell interior and exterior shapes are created, which are heatable and can be mounted on a press. Then can for example, impregnated with resin Carbon fiber mats molded in the press and heated at the same time corroborated become.

in the Within the scope of the invention, the aim stated above is also included an automobile exhaust system that includes an automotive exhaust muffler according to the invention. In addition, will this object by the present invention with a motor vehicle achieved with an automotive exhaust muffler according to the invention, wherein the shape of the underbody of the motor vehicle a Installation space for defines the automobile exhaust silencer is, and wherein the plastic shell to the shape of the subfloor adapted shaped in the field of installation space.

to further increase the soundproofing can the car exhaust unit according to the invention or the automobile exhaust silencer according to the invention at least another silencer, in particular at least one further muffler with at least one housing part made of plastic.

Farther The above mentioned goal is still with a method for Production of an automobile exhaust silencer according to the invention achieved, being a case of the damping pot through in particular gas-tight connection of a plastic shell and a lower part is formed.

• – Ermitteln der Formgebung und/oder Abmessungen des Einbauraumes für den Dämpfungstopf am Unterboden eines Fahrzeuges, für das der Automobil-Abgasschalldämpfer bestimmt ist,
• – Abnehmen der Außenform von der ermittelten Formgebung und/oder den ermittelten Abmessungen des Einbauraumes am Unterboden eines Fahrzeuges für den Dämpfungstopf, insbesondere mit Glasfaserkunststoff, wobei insbesondere zwei Formhälften gebildet werden,
• – Laminieren, vorzugsweise 3-faches Laminieren, der Innenseite jeder Formhälfte, insbesondere mit Carbonfasermatten und hitzebeständingem Epoxidharz zur Erstellung des Kunststoffoberteils und/oder ggf. des Kunststoffunterteils des Gehäuses des Dämpfungstopfes,
• – Entfernen des Kunststoffoberteils und/oder ggf. des Kunststoffunterteils des Gehäuses des Dämpfungstopfes nach dem Laminieren und bereits nach teilweiser Erhärtung,
• – vollständige Aushärtung des Kunststoffoberteils und/oder ggf. des Kunststoffunterteils des Gehäuses des Dämpfungs topfes nach deren Entnahme im teilweise gehärteten Zustand aus den Formhälften, insbesondere durch Erhitzen in einer Thermokammer,
• – Erstellung und/oder Endbearbeitung von Aussparungen zur Durchführung des Verbundes aus Abgaszuleitung, Durchführverteilungsleitung und Abgasableitung,
• – Endbearbeitung von Aussparungen zur Durchführung des Verbundes aus Abgaszuleitung, Durchführverteilungsleitung und Abgasableitung mit Einarbeitung von Nuten zur Aufnahme von Verbindungseinrichtungen,
• – Einlegen von einer hitzebeständigen Folie in das Kunststoffoberteil und/oder ggf. das Kunststoffunterteil des Gehäuses des Dämpfungstopfes,
• – Einlegen von Dämmmitteln in das Kunststoffoberteil und/oder das Unterteil des Gehäuses des Dämpfungstopfes,
• – Erstellen von Abgaszuleitung, Durchführverteilungsleitung und Abgasableitung als einstückige oder integrale Einheit,
• – Beschichten von Abgaszuleitung, Durchführverteilungsleitung und/oder Abgasableitung zur Hitzeisolation,
• – Umwickeln zumindest der Durchführverteilungsleitung in dem innerhalb des Gehäuses des Dämpfungstopfes liegenden Bereiches mit Dämmmitteln, insbesondere Edelstahlwolle,
• – Aufschieben von Verbindungseinrichtungen, insbesondere ringartigen Dichtungen und/oder Hitzeisolierungen auf die Einheit aus Abgaszuleitung, Durchführverteilungsleitung und Abgasableitung zur Vorplatzierung,
• – Einlegen von der Einheit aus Abgaszuleitung, Durchführverteilungsleitung und Abgasableitung in das Kunststoffoberteil oder in das Unterteil,
• – Bestreichen der Kontaktflächen von Kunststoffoberteil und/oder Unterteil mit hitzebeständigem Klebstoff,
• – Zusammenfügen von Kunststoffoberteil und/oder Unterteil, insbesondere durch Anlage jeweils zugeordneter Flanscheinrichtungen und/oder in Eingriff Bringen jeweils zugeordneter Formschlussausgestaltungen,
• – Vernieten von Kunststoffoberteil und/oder Unterteil nach dem Zusammenfügen.

In the following, some process steps are specified which, individually or in any desired combinations, represent advantageous and / or preferred further developments of the process according to the invention, in that one or more of the following steps are contained in the process:

• Determining the shape and / or dimensions of the installation space for the damping pot on the underbody of a vehicle for which the automobile exhaust muffler is intended,
• Detaching the outer shape from the determined shape and / or the determined dimensions of the installation space on the underbody of a vehicle for the damping pot, in particular with glass fiber plastic, wherein in particular two mold halves are formed,
• Laminating, preferably 3-fold laminating, the inside of each mold half, in particular with carbon fiber mats and heat-resistant epoxy resin for producing the plastic upper part and / or possibly the plastic lower part of the housing of the damping pot,
• Removal of the plastic upper part and / or possibly of the plastic lower part of the housing of the damping pot after lamination and after partial hardening,
• Complete curing of the plastic upper part and / or possibly of the plastic lower part of the housing of the damping pot after its removal in the partially cured state from the mold halves, in particular by heating in a thermal chamber,
• Creation and / or finishing of recesses for carrying out the combination of exhaust gas feed line, feed-through distribution line and exhaust gas discharge,
• - Finishing of recesses for carrying out the composite of exhaust gas supply line, feedthrough distribution line and exhaust gas discharge with incorporation of grooves for receiving connecting devices,
• Inserting a heat-resistant foil in the plastic upper part and / or possibly the plastic lower part of the housing of the damping pot,
• Inserting insulating means in the plastic upper part and / or the lower part of the housing of the damping pot,
• Creation of exhaust feed line, feed-through distribution line and exhaust gas discharge as a one-piece or integral unit,
• Coating of exhaust gas feed line, feed-through distribution line and / or exhaust gas discharge line for heat insulation,
• - Wrapping at least the feedthrough distribution line in the lying within the housing of the damping pot area with insulating means, in particular stainless steel wool,
• Sliding on connecting devices, in particular ring-like seals and / or heat insulation, on the unit from the exhaust gas feed line, feed-through distribution line and exhaust gas outlet for pre-placement,
• - Insertion of the unit from exhaust gas supply line, feed-through distribution line and exhaust gas discharge in the plastic upper part or in the lower part,
• Coating the contact surfaces of plastic upper part and / or lower part with heat-resistant adhesive,
• Joining of the plastic upper part and / or the lower part, in particular by means of respective flange devices assigned to each other and / or engagement of respectively associated form-fitting embodiments,
• - Riveting of plastic upper part and / or lower part after assembly.

• – Abnehmen der Außenform des gewünschten Schalldämpfers mit Glasfaserkunststoff
• – Forminnenseite mit Carbonfasermatten und wärmefestem Harz laminieren
• – Nach der vorläufigen Erhärtung die Schalen aus der Form nehmen
• – Zur vollständigen Aushärtung in der Thermokammer erhitzen
• – Schalldämpfer Ein- und Ausgang vergrößern
• – Eine Nut für die Dichtung aus Carbon erstellen
• – Halter in der Schweißvorrichtung anbringen
• – Eingangsrohr mit Lochrohr, Endrohr und Halter anpassen und in der Schweißvorrichtung verschweißen
• – Rohrwerk hitzeisolierend beschichten
• – Lochrohr mit Edelstahlwolle umwickeln
• – Dichtringe beidseitig über das Rohr schieben
• – Beide Schalldämpfer mit Dämmmaterial füllen
• – Dichtflächen mit elastischer hitzebeständiger Dichtung bestreichen
• – Beide Schalen zusammenfügen
• – Dichtrandflächen mehrfach durchbohren und beide Schalen miteinander vernieten
• – Schalldämpfer am Fahrzeug anpassen

Only as an example for carrying out a method according to the invention are the method steps listed below to be understood:

• - Remove the outer shape of the desired silencer with fiberglass
• - Laminate the inside of the mold with carbon fiber mats and heat-resistant resin
• - After preliminary hardening remove the dishes from the mold
• - Heat to complete curing in the thermal chamber
• - Increase muffler input and output
• - Create a groove for the carbon seal
• - Attach holder in the welding device
• - Adjust the inlet pipe with perforated pipe, tailpipe and holder and weld in the welding device
• - Coat pipe plant with heat insulation
• - Wrap the perforated pipe with stainless steel wool
• - Slide sealing rings over both sides of the pipe
• - Fill both silencers with insulation material
• - Coat sealing surfaces with elastic heat-resistant gasket
• - put both bowls together
• - Pierce sealing edge surfaces several times and rivet both shells together
• - Adapt the silencer to the vehicle

Further Process and device features are analogous also from device or process explanations.

Finally will the object underlying the invention still by a use of molded parts for producing an automobile exhaust silencer, which use is characterized in that as a molded part according to the embodiments the automotive exhaust silencer according to the invention a Plastic upper part and possibly a plastic base is used.

Further Features of the invention will become apparent from the following description of preferred embodiments the invention in conjunction with the drawing and the Unteransprü chen. in this connection can the individual features in each case for themselves be realized alone or in combination with each other.

Further give advantageous and / or preferred embodiments of the invention arising from the entirety of the available documents, in particular the independent one and dependent claims and their expert Combinations.

The Invention is based on embodiments explained in more detail below with reference to the drawing, in which

1 3 shows a schematic perspective top view of an exemplary embodiment of an automobile exhaust silencer according to the invention,

2 a schematic plan view of the embodiment of the automobile exhaust silencer according to the 1 shows, wherein the plastic upper part, which may also be referred to as the upper muffler housing shell, is omitted, so that the interior of the automobile exhaust muffler is recognizable,

3 a schematic plan view of the inner sides of the plastic shell and the lower part - in the present case also of plastic - or in other words the muffler housing shells, the embodiment of the automobile exhaust muffler according to the 1 or 2 shows,

4 a schematic side view of plastic upper part and lower part - in the present case also of plastic -, so the silencer housing shells in the assembled state after the 3 shows, and

5 a schematic front view of plastic upper part and lower part - in the present case also of plastic -, al so the silencer housing shells in the assembled state after the 3 shows.

Based the below described and shown in the drawing execution and application examples, the invention is merely exemplary explained in more detail. Process and device features arise analogously also from device or process descriptions.

The same reference numerals in the individual figures and illustrations of the drawing designate the same or similar or the same or similar components. On the basis of the representations in the drawing, those features are also clear, which are not provided with reference numerals, regardless of whether such features below are described or not. On the other hand, features that are included in the present description but are not visible or illustrated in the drawing will be readily understood by those skilled in the art.

Separate Features that specify in connection with specific embodiments and / or are not shown in these embodiments or the combination with the rest Features of these embodiments limited, but you can in the context of the technically possible with any other variants, even if they are in the present Documents are not treated separately.

Further is in connection with the following with reference to the figures of Explained drawing concrete embodiments to the illustrations of the invention in the above description introduction So that all the variations disclosed therein, Modifications, substitutions and combinations of features and Feature groups in the embodiments explained below as further design options are involved.

The 1 to 5 show an embodiment of an automotive exhaust silencer according to the invention 1 ,

The main external components of this automobile exhaust silencer 1 are, as in the 1 it can be seen, an exhaust gas supply line 4 and an exhaust gas discharge 5 as well as an intermediate damping pot 3 , The exhaust gas supply line 4 and the exhaust gas discharge 5 this embodiment consist of 4301 stainless steel, have a diameter of 70 mm and a wall thickness of 1.5 mm and are provided on their inner sides with a heat-resistant ceramic coating.

The exhaust gas discharge 5 is a tailpipe of an automobile exhaust system (not shown) to the automobile exhaust muffler 1 belongs. The exhaust gas supply line 4 is tube-like and has a connection end 24 on, in the usual way has a widened cross-section compared to the rest of the exhaust gas supply cross-section, which is at least substantially the same cross-section that have the remaining piping of the automobile exhaust system. Due to the widened cross-section of the connection end 24 the exhaust gas supply line 4 It can easily be plugged in another exhaust pipe (not shown) of the automobile exhaust system for connection. To further simplify this insertion and at the same time a sealable connection between the exhaust gas supply line 4 and to allow another exhaust pipe of the automobile exhaust system to the engine (not shown), is the terminal end 24 with slits 26 Mistake. This allows the connection end 24 in the area of the slots 26 after inserting another exhaust pipe, for example, with a sleeve or clamp (not shown) compress or pull tightly around the inserted end of the further exhaust pipe, so that a sealed connection is formed.

The damping pot 3 contains, as in particular in the 1 . 3 . 4 and 5 you can see a case 2 with a plastic upper part facing the underbody when mounted on a motor vehicle 6 and a lower part 7 that are interconnected.

The plastic shell 6 of the housing 2 the damping pot 3 allows utilization of the available space on the underside of the vehicle, as it is limited with a metal part and at high cost or usually not possible. The plastic shell 6 can be produced with simple production techniques in every conceivable shape, with all the spatial possibilities at the vehicle underside to optimize the automobile exhaust silencer 1 can be used.

Vehicle undersides have a variety of configurations to meet the requirements for stiffness, weight savings, inputs and attachments both in the vehicle interior and on the underside of the vehicle and air resistance and handling. On the one hand is also installation space for automotive exhaust muffler provide, on the other hand, the shape and location in the design of vehicle undersides can not be arbitrarily taken into account, for the reasons that there are other requirements and that the shape of the vehicle in the rest in particular material limits are set. In the present automotive exhaust muffler 1 the existing problems of spatial and formal restrictions for a demand optimized automobile exhaust silencer are solved to the extent of the absolute possibilities.

In the present embodiment is also lower part 7 a plastic part and thus to be called a plastic lower part. This has a number of advantages. On the one hand this makes it possible that the plastic upper part 6 and the lower part 7 (see in particular the 3 . 4 and 5 ), which may be made of the same plastic, have the same thermal expansion behavior. There is thus no danger that the damping pot 3 eg warps and leaks or even gets damaged. Furthermore, advantageously, the simple, unlimited and cheap Shaping possibilities also at the lower part 7 to optimize the automobile exhaust silencer 1 be used, such as in a suitable form in the vertical plane parallel to the vehicle underbody. In particular, the combination of plastic shell 6 and plastic base 7 , even more than the plastic top 6 alone, make it possible to exploit all spatial possibilities on the underside of the vehicle in order to optimally design the damping pot in terms of shape and volume.

Thus, the present invention also includes a motor vehicle with an automobile exhaust muffler 1 , Wherein by the shape of the underbody of the motor vehicle, an installation space for the automobile exhaust muffler 1 is defined, and the plastic top 6 as well as possibly the plastic lower part 7 adapted to the shape of the subfloor in the field of installation space is designed / are.

The plastic shell 6 and / or optionally the plastic base 7 (see in particular the 3 . 4 and 5 ) consist / consists in the present embodiment of carbon fiber plastic and heat-resistant epoxy lamination resin, which is composed of resin, hardener and accelerator. The plastic shell 6 and / or optionally the plastic base 7 may preferably contain at least one of the group consisting of carbon fiber plastic, fiberglass, aramid fibers and ceramic fibers, preferably containing a carbon fiber resin treated with a resin composition, and more preferably one treated with a heat resistant epoxy resin composition consisting of resin, hardener and accelerator Carbon fiber plastic is included.

How very good in the 3 . 4 and 5 can be seen, in the present embodiment, the plastic upper part 6 and the plastic base 7 - or in general the lower part - cup-shaped. In this respect, the present invention also includes the use of moldings for the manufacture of an automobile exhaust silencer 1 by from a plastic at least one upper part 6 and a lower part, in particular a plastic lower part 7 an overall molded part is produced.

The plastic shell 6 and the lower part 7 , which is also made of plastic in the present embodiment, are, as in the 1 is shown by fasteners 18 connected in a gastight manner. These fastening devices 18 contain flange devices 19 each on the plastic shell 6 and the lower part 7 and heat-resistant adhesive 20 as well as rivets 21 , The flange devices 19 , which can contain widened end surfaces, but also correct flanges, form when joining plastic upper part 6 and lower part 7 Contact surfaces that have a good and compared to the normal material thickness of plastic shell 6 and lower part 7 significantly increased effective area for the adhesive 20 represent. These contact surfaces on the flange devices 19 of plastic top 6 and lower part 7 are at least substantially congruent.

Alternatively or additionally, the fastening devices 18 also contain form-fitting designs (not shown). These include, for example, enclosures, for example, the flange devices 19 on the plastic upper part 6 concerning the flange devices 19 on the plastic base 7 to understand. But it can also be tongue and groove designs, in particular with a dovetail or similar preferably elastic profile, so that after pressing the spring into the groove holds a self-holding effect, the two shell parts together. Another version may include telescoping profiles, for example, along two parallel especially longitudinal sides of the two shell parts, so that it alone anyway along these pages a good seal is achieved. However, it is preferred if the form-fitting embodiments, in particular with the heat-resistant adhesive 20 combined. The heat-resistant adhesive 20 ensures the tight assembly of the shells, and the form-fitting designs and / or the rivets 21 provide high holding forces.

Of completeness is still to mention that instead of riveting 20 Also any other equivalent or similar acting means can be used, such as brackets (not shown), for example, only on the flange devices 19 can act, but also the entire damping pot 3 which can also be realized by tensioning straps, in particular made of stainless steel. Instead of the heat-resistant adhesive 20 may be sufficient in conjunction with other agents that provide high cohesive forces, in particular a pure sealant with suitable heat resistance.

Another in the embodiment of 1 to 5 intended design variant are reinforcing devices 22 that, as in the 1 is shown, for example, by reinforcing tapes, braces or clips 23 , in particular to the shape of plastic shell 6 and / or plastic base 7 are adapted. Such amplification devices 22 contribute to the stability of the damping pot 3 or his case 2 at and may alternatively or additionally to the reinforcing tapes, braces or braces 23 also thickening and / or stiffening shapes of the material of the plastic shell 6 and / or plastic base 7 be formed.

Referring now to the 2 contains the damping pot 3 further, one in the housing 2 extending feedthrough distribution line 8th , on the one hand with the exhaust gas supply line 4 and on the other hand with the exhaust gas discharge 5 connected so that the housing 2 from the composite exhaust gas supply line 4 , Performing distribution line 8th and exhaust gas discharge 5 will be carried. In the embodiment shown in the figures of the drawing, it is further provided in this regard that the exhaust gas supply line 4 with the exhaust gas discharge 5 by means of the feedthrough distribution line 8th at least substantially rigidly connected, wherein preferably the exhaust gas supply line 4 with the bushing distribution pipe 8th and the latter with the exhaust gas discharge 5 may be integrally formed or welded, as through the joints 25a . 25b . 25c and 25d is illustrated schematically.

The above-described construction of the damping pot 3 with the housing 2 on the combination of exhaust gas supply line 4 , Bushing distribution pipe 8th and exhaust gas discharge 5 also allows, for example, in conjunction with appropriate fastening devices 18 which can be opened and closed again without damage, eg the plastic upper part 6 and / or plastic base or generally lower part 7 can easily be replaced. This allows damaged or worn parts to be replaced alone, without the entire automobile exhaust silencer 1 needs to be renewed. Furthermore, various parts can be combined and used depending on vehicle and / or engine variants, so that in particular the cost advantages of a large-scale production of the automobile exhaust silencer 1 can be used as far as possible by a so-called modular design. This is further supported by the fact that adaptations to different national regulations and climatic conditions are easily possible by the automobile exhaust silencer 1 suitable assembled from the kit and can be set. Also an adaptation of the automobile exhaust silencer 1 to special conditions of use or use is easily possible by the interchangeability of individual parts, including components inside the damping pot 3 , such as insulation materials, can be easily replaced. As a result, for example, a sporting use or a pure urban area use of such a driving equipped so equipped bill and his automobile exhaust muffler 1 be adapted accordingly.

A further advantageous and preferred embodiment of the automobile exhaust silencer 1 according to the embodiment in the figures is that for attachment and in particular also stabilization of the automobile exhaust silencer 1 on a motor vehicle mounts 9a . 9b and 9c are provided at the feedthrough distribution line 8th and the exhaust gas discharge 5 attack, but in principle also with the exhaust gas supply 4 can be firmly connected. This ensures that no pure holding forces in the housing 2 the damping pot 3 ie in the plastic upper part 6 and / or plastic base 7 be initiated. finds a lower part 7 For example, metal use, so suitable holders, for example, alternatively or additionally, on such a lower part 7 eg attack from metal. The brackets 9a . 9b and 9c , whose design and arrangement and number are only exemplary in this case, attack with their free ends to corresponding counterparts or suspensions, for example, to the vehicle underside.

As continues in the 2 by the representation with omission of plastic upper part 6 can be clearly seen, the feedthrough distribution line 8th Passage openings 10 inside the case 2 otherwise in its wall, through which passage openings 10 Exhaust gases and noise from the feed-through distribution line 8th inside the entire case 2 get the damping pot where the actual sound attenuation takes place. In the embodiment discussed here, this is realized by the feedthrough distribution line 8th is formed by perforated pipe sections, by means of the connection points 25a . 25b . 25c and 25d with the exhaust gas supply line 4 and with the exhaust gas discharge 5 as well as with a knee-pipe 27 eg joined together by welding. The knee-ear 27 serves only for adaptation to a desired course of exhaust gas supply line 4 to exhaust gas discharge 5 and may be omitted in other course specifications or replaced, for example, by differently shaped tubes. Also, the exhaust gas supply line 4 and / or exhaust gas discharge 5 as well as perforated pipe sections themselves differently than in the embodiment shown to be straight running. Furthermore, it does not matter whether one or more perforated pipe sections (e) are provided, and also not whether one or more perforated pipe sections (e) are integral with the exhaust gas supply line 4 and / or exhaust gas discharge 5 are executed, or whether in total inside the housing 2 the damping pot 3 a perforated pipe runs and the feedthrough distribution line 8th forms. The present invention does not limit the person skilled in the art to take into account the spatial requirements with the course of the exhaust pipe.

In the present embodiment, furthermore, the exhaust gas supply line 4 , the exhaust gas discharge 5 and the feed-through distribution line 8th to the heat isola Ceramic coated, wherein any other equivalent coatings can also be provided with advantage. A heat-insulating coating has the advantage that the materials, in particular plastic upper part 6 and / or plastic base 7 not so much burdened by the heat / will affect the exhaust gas supply 4 , the exhaust gas discharge 5 and the feed-through distribution line 8th preferably made of stainless steel, are heated by the combustion exhaust gases from the engine of the automobile. This reduces the burden of plastic top 6 or plastic base 7 and thus their durability as well as easier and cheaper manufacturability benefits.

To improve the above related to the passage openings 10 in the implementation distribution line 8th already mentioned sound attenuation inside the entire housing 2 The attenuation pot are also in the present embodiment, as is common in the art even with pure metal damping cups inside the housing 2 the silencer or damping pot 3 Insulating products 11 intended. In the presently treated variant contain the insulation 11 Steel wool and most preferably stainless steel wool 12 that the performing distribution line 8th at least in the area of the passage openings 10 surrounds. The stainless steel wool 16 is around the bushing distribution line 8th wrapped around (for clarity, the stainless steel wool in the 2 only at the edge of the feed-through distribution line 8th indicated) and with this point for example spot welded.

The internal volume of the housing 2 the damping pot 3 in the rest is with basalt wool and / or glass fiber wool 13 as insulation 11 at least substantially substantially, but more or less loosely filled, which the skilled person can easily decide or determine, without becoming inventive or departing from the scope of the present invention, as well as those skilled in other damping materials and / or damping effects from his appropriate knowledge and skills.

Preferably, the plastic shell 6 and the plastic base 7 of the housing 2 the damping pot 3 on their inner sides, ie with a heat-resistant foil or another heat-resistant layer against the heat from the composite exhaust gas supply line 4 , the exhaust gas discharge 5 and the feed-through distribution line 8th protected. This provides a wider range of materials for the plastic top 6 and the plastic base 7 available, and suitable materials can to a greater extent regardless of the thermal specifications of such materials for the plastic top 6 and the plastic base 7 to be selected.

Only manufacturing technology relevant is the design of the housing 2 the damping pot 3 in the present embodiment, in particular the 1 . 2 . 3 and 4 can be seen by recesses 14a . 14b . 15a and 15b in the plastic shell 6 and the plastic base or generally lower part 7 of the housing 2 the damping pot 3 for carrying out the composite from exhaust gas supply line 4 , Implementation management 8th and exhaust gas discharge 5 are provided. Here are the recesses 14a and 14b in the plastic shell 6 as well as the recesses 15a and 15b in the plastic base 7 included, like the 3 clearly shows. In the assembled state of plastic shell 6 and plastic base 7 form the recesses 14a and 15a on the one hand, and 14b and 15b on the other hand openings (see for clarification the 5 and their synopsis with the 1 ) for the composite component from the exhaust gas supply line 4 , Bushing distribution pipe 8th and exhaust gas discharge 5 ,

Next are between the materials of Kunststoffober- and -unterteile 6 respectively. 7 and the corresponding locations of exhaust gas supply line 4 , Bushing distribution pipe 8th and exhaust pipe 5 in the region of the recesses 14a . 14b . 15a and 15b Provided connecting devices, in the present case by heat-insulating seals 17 are formed. Because of the tubular cross-section are the heat-insulating seals 17 designed ring-like and pushed over the corresponding tubes to the appropriate places. To fulfill their function, the heat-insulating seals contain 17 Fiberglass, teflon and / or asbestos. Depending on requirements, the heat-insulating seals can fulfill only a sealing function or only a heat insulation function.

In other types of damping pot 3 can the connecting devices 16 have other designs, shapes and / or materials, such as when the composite exhaust gas supply 4 , Bushing distribution pipe 8th and exhaust pipe 5 not from the plastic top 6 and the plastic base 7 is surrounded, but the latter are only attached to the top or bottom of this composite.

In the following, only by way of example, but only by way of example, examples of methods for producing an automobile exhaust silencer will be given 1 received.

The principle of such methods is that a housing 2 the damping pot 3 in particular by gas-tight connection of a plastic shell 6 and a lower part, preferably egg nes plastic base 7 , is formed. The use of the plastic shell 6 implies a series of preceding and following process steps and their specifications. The advantages of the individual process steps correspond directly to those already mentioned above in connection with the structural measures or derive directly from them.

To optimize the shape and volume of the damping pot 3 of automobile exhaust silencer 1 First of all, a determination is made of the shape and dimensions of the installation space for the damping pot 3 on the underbody of a vehicle, for which the automobile exhaust muffler 1 is determined. If the outer shape is removed from this determination result, then there is a first rough model for the damping pot 3 available, which can then be designed with its shape and dimensions, preferably within the shape and dimensions of this model. The lower road near the limit of the so-called replica installation space is in particular by the desired ground clearance of the automobile exhaust muffler 1 vehicle to be equipped. Preferably, fiber optic plastic is used for this step of decreasing the shape and dimension, in particular, two mold halves are formed.

Maximum can be the shape created above for the damping pot 3 the automobile exhaust silencer 1 be used. In this case, the later distance of the damping pot from the underbody of the vehicle can be adjusted by the thickness of the material of the mold half obtained from the vehicle underbody. In particular, however, only with the shape of the mounting frame, the design for any case, the plastic shell 6 , possibly also the plastic lower part 7 of the housing 2 the damping pot 3 determined and created.

The for the molding of plastic shell 6 and possibly plastic lower part 7 formed molds are lamminated on the insides according to an embodiment of the presently discussed manufacturing process. It is further preferred to lambrate three times. The materials used are preferably carbon fiber mats in combination with heat-resistant epoxy resin.

Depending on the materials used and the shape chosen, the plastic top part becomes 6 and possibly the plastic lower part 7 of the housing 2 the damping pot 3 taken after lambing and possibly already after only partial hardening from the respective forms. The complete curing of plastic shell 6 and / or possibly plastic lower part 7 of the housing 2 the damping pot 3 can then take place after removal of these parts in the partially cured state from the mold halves in particular by heating in a thermal chamber. Alternatively, but also, for example, heatable forms can be used.

If this has not already been done with the shaping itself, then, for example, the recesses 14a . 14b . 15a . 15b in the plastic shell 6 and possibly the plastic lower part 7 be introduced. Furthermore, any other required finishing on the parts thus created, such as a sufficiently accurate cut, can be made. This includes, for example, work on the incorporation of grooves in the recesses 14a . 14b . 15a . 15b and / or flange devices 19 For example, to receive corresponding seals in the assembled state.

Before assembling plastic shell 6 and lower part 7 may then be a heat-resistant film or other heat-resistant layer (not shown) on the inside of the plastic shell 6 and possibly also the plastic base 7 of the housing 2 the damping pot 3 to be ordered. continue to be the insulation 11 in the plastic shell 6 and / or the lower part 7 of the housing 2 the damping pot 3 inserted.

Regardless of the actual shaping and equipment steps in the manufacturing process of the damping pot 3 can be a one-piece or integral unit of exhaust gas supply 4 , Bushing distribution pipe 8th and exhaust gas discharge 5 to be created. Thereafter, preferably the coating of this unit is carried out for heat insulation. Depending on the embodiment, this unit is then in the later within the housing 2 the damping pot 3 lying area with insulation 11 , in particular stainless steel wool 12 , wrapped. Before or after, if necessary, connecting devices 16 deferred, such as annular seals and / or heat insulation 17 to these connecting devices 16 suitable for later assembly of the entire damping pot 3 to place.

The thus created component is then in the plastic shell 6 or in the lower part 7 inserted. The contact surfaces of the plastic shell 6 and / or lower part 7 , in particular by the flange devices and possibly the recesses 14a . 14b . 15a and 15b are determined are then coated or otherwise provided with heat-resistant adhesive, whereupon according to the usage specifications of the adhesive, the plastic shell 6 and the lower part 7 be joined together. If form-fitting designs are present, this operation just made the corresponding positive connections. Thereafter, if necessary, for example, a further solidification of the compound of plastic shell 6 and lower part 7 by riveting or otherwise, as it results from the above description of the corresponding embodiment.

The Invention is based on the embodiments in the description and in the drawing merely by way of example represents and is not limited to, but includes all Variations, modifications, substitutions and combinations that the person skilled in the present documents, especially in the context the claims and the general illustrations in the introduction of this specification as well the description of the embodiments and their representations in the drawing and with his expert Knowledge and the state of the art. Especially are all individual features and design options of the invention and their embodiments combined.

Claims (10)

Automotive Exhaust Muffler ( 1 ) with an exhaust gas supply line ( 4 ) and an exhaust gas discharge ( 5 ) and an intermediate damping pot ( 3 ), characterized in that the damping pot ( 3 ) a housing ( 2 ) with a plastic upper part to be turned over when being mounted on a motor vehicle ( 6 ) and a lower part ( 7 ), which are connected to each other, and that the damping pot ( 3 ) further in the housing ( 2 ) running feedthrough line ( 8th ), on the one hand with the exhaust gas supply line ( 4 ) and on the other hand with the exhaust gas discharge ( 5 ) is connected so that the housing ( 2 ) from the composite exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and exhaust gas discharge ( 5 ) will be carried. Automotive Exhaust Muffler ( 1 ) according to claim 1, characterized in that - the exhaust gas supply line ( 4 ) with the exhaust gas discharge ( 5 ) by means of the feedthrough distribution line ( 8th ) is at least substantially rigidly connected, wherein preferably the exhaust gas feed line ( 4 ) with the feedthrough distribution line ( 8th ) and / or the feedthrough distribution line ( 8th ) with the exhaust gas discharge ( 5 ) are integrally formed or welded / is, and / or - that the exhaust gas discharge ( 5 ) is an exhaust pipe of an automobile exhaust system, and / or - that for mounting the automobile exhaust silencer ( 1 ) on a motor vehicle mounts ( 9a . 9b . 9c ) are provided, which at the exhaust gas supply line ( 4 ), the implementation distribution line ( 8th ) and / or the exhaust gas discharge ( 5 attack). Automotive Exhaust Muffler ( 1 ) according to claim 1 or 2, characterized in that - the feedthrough distribution line ( 8th ) Passage openings ( 10 ) inside the case ( 2 ) in the rest in its wall, wherein preferably the feedthrough distribution line ( 8th ) is formed by a perforated pipe or a perforated pipe section or contains a perforated pipe section, and / or - that the exhaust gas feed line ( 4 ) and / or the exhaust gas discharge ( 5 ) and / or the feedthrough distribution line ( 8th ) are heat-insulating coated, preferably ceramic coated, are / is. Automotive Exhaust Muffler ( 1 ) according to one of the preceding claims, characterized in that - inside the housing ( 2 ) of the damping pot ( 3 ) Insulation ( 11 ) are provided, wherein preferably the insulating means ( 11 ) Steel wool and / or stainless steel wool ( 12 ) and / or basalt wool and / or glass fiber wool ( 13 ), and / or - that the housing ( 2 ) Recesses ( 14a . 14b . 15a . 15b ) for carrying out the composite from exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and exhaust gas discharge ( 5 ), in particular between the recesses ( 14a . 14b . 15a . 15b ) and the composite of exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and exhaust gas discharge ( 5 ) Connecting devices ( 16 ) are provided, wherein preferably the connecting means by seals and / or heat insulation ( 17 ) are formed, and wherein particularly preferably the seals and / or heat insulation ( 17 ) are ring-like and / or contain glass fiber, Teflon and / or asbestos. Automotive Exhaust Muffler ( 1 ) according to one of the preceding claims, characterized in that - the lower part ( 7 ) is a plastic lower part, and / or - that the plastic upper part ( 6 ) and / or the lower part ( 7 ) are / is shaped, and / or - that when mounting on a motor vehicle whose underbody zuwendenenden plastic upper part ( 6 ) is shaped in adaptation to a defined by the shape of the vehicle underbody installation space, and / or - that the plastic upper part ( 6 ) and / or possibly the plastic lower part ( 7 ) Contains at least one plastic selected from the group consisting of carbon fiber plastic, fiberglass, aramid fibers and ceramic fibers, preferably containing a treated with a resin composition carbon fiber plastic, and more preferably containing a treated with a heat-resistant epoxy resin consisting of resin, hardener and accelerator carbon fiber plastic , and / or - that the plastic upper part ( 6 ) and the lower part ( 7 ) by fasteners ( 18 ) are in particular gas-tightly connected to one another, wherein preferably the fastening devices ( 18 ) Flange devices ( 19 ) and / or form-fitting configurations respectively on the plastic upper part ( 6 ) and the lower part ( 7 ) and / or heat-resistant adhesive ( 20 ) and / or rivets ( 21 ), and / or - that the plastic upper part ( 6 ) and / or the lower part ( 7 ) with reinforcing devices ( 22 ), which preferably contain thickening and / or stiffening shapes of the material, and / or that for the housing ( 2 ) Reinforcement facilities ( 22 ) are provided which preferably at least substantially dimensionally stable reinforcing tapes, braces and / or braces ( 23 ) contain. Automotive exhaust system, characterized in that an automobile exhaust silencer ( 1 ) is contained according to one of claims 1 to 5. Motor vehicle with an automobile exhaust silencer ( 1 ) according to one of claims 1 to 5, characterized in that by the shape of the underbody of the motor vehicle, an installation space for the automobile exhaust silencer ( 1 ) and that the plastic upper part ( 6 ) is shaped to the shape of the subfloor adapted in the region of the installation space. Method for producing an automobile exhaust silencer ( 1 ) according to one of claims 1 to 5, characterized in that a housing ( 2 ) of the damping pot ( 3 ) by in particular gas-tight connection of a plastic upper part ( 6 ) and a lower part ( 7 ) is formed. A method according to claim 8, characterized in that one or more of the following steps is included: - Determining the shape and / or dimensions of the installation space for the damping pot ( 3 ) on the underbody of a vehicle for which the automotive exhaust muffler ( 1 ), - Removing the outer shape of the determined shape and / or the determined dimensions of the installation space on the underbody of a vehicle for the damping pot ( 3 ), in particular with glass fiber plastic, wherein in particular two mold halves are formed, - laminating, preferably 3-fold lamination, the inside of each mold half, in particular with carbon fiber mats and heat-resistant epoxy resin for creating the plastic shell ( 6 ) and / or possibly the plastic lower part ( 7 ) of the housing ( 2 ) of the damping pot ( 3 ), - removing the plastic upper part ( 6 ) and / or possibly the plastic lower part ( 7 ) of the housing ( 2 ) of the damping pot ( 3 ) after lamination and already after partial hardening, - complete curing of the plastic shell ( 6 ) and / or possibly the plastic lower part ( 7 ) of the housing ( 2 ) of the damping pot ( 3 ) after removal in the partially cured state from the mold halves, in particular by heating in a thermal chamber, - creation and / or finishing of recesses ( 14a . 14b . 15a . 15b ) for carrying out the composite from exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and exhaust gas discharge ( 5 ), - finishing of recesses ( 14a . 14b . 15a . 15b ) for carrying out the composite from exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and exhaust gas discharge ( 5 ) with incorporation of grooves for receiving connecting devices ( 16 ), - inserting a heat-resistant film in the plastic upper part ( 6 ) and / or possibly the plastic lower part ( 7 ) of the housing ( 2 ) of the damping pot ( 3 ), - insertion of insulating materials ( 11 ) in the plastic upper part ( 6 ) and / or the lower part ( 7 ) of the housing ( 2 ) of the damping pot ( 3 ), - creation of exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and exhaust gas discharge ( 5 ) as a one-piece or integral unit, - coating of exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and / or exhaust gas discharge ( 5 ) for heat insulation, - wrapping at least the feedthrough distribution line ( 8th ) in the inside of the housing ( 2 ) of the damping pot ( 3 ) lying area with insulating means, in particular stainless steel wool, - sliding of connecting devices, in particular ring-like seals and / or heat insulation on the unit from exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and exhaust gas discharge ( 5 ) for pre-placement, - insertion of the unit from exhaust gas supply line ( 4 ), Feedthrough distribution line ( 8th ) and exhaust gas discharge ( 5 ) in the plastic upper part ( 6 ) or in the lower part ( 7 ), - brushing the contact surfaces of plastic upper part ( 6 ) and / or lower part ( 7 ) with heat-resistant adhesive, - assembly of plastic upper part ( 6 ) and / or lower part ( 7 ), in particular by the arrangement of respectively associated flange devices and / or in each case bringing associated form-fitting configurations, - riveting of plastic upper part ( 6 ) and / or lower part ( 7 ) after joining. Use of molded parts for producing an automobile exhaust silencer ( 1 ), characterized in that as molding according to one of claims 1 to 5, a plastic upper part ( 6 ) and possibly a plastic lower part ( 7 ) is used.