DE6919298U - SILENCER SYSTEM. - Google Patents

Description

1103 D.

J. Eberspächer Esslingen / N., 13.8.1973

Silencer system

The present invention relates to a silencer system consisting of a rear silencer and a center silencer as well as a pipe joining part and possibly one Front silencer and a double tailpipe. With this silencer system, depending on how the rear silencer is designed to be dispensed with a front silencer.

There are already so-called two-pot or three-pot silencer systems known. Under two-pot or three-pot silencer systems are understood to mean systems that consist of a rear silencer and a middle silencer, or from a rear silencer, a middle silencer and a front silencer. There are also already orders known, which end in a double pipe, the double end pipe being used for additional sound absorption. Such twin tailpipes are z. B. from the Pa. Abarth manufactured. The known arrangements all have the significant Disadvantage that the individual silencers (pots) only have to be precisely matched to one another on the basis of measurement and test results after they have been designed, before even a reasonably adequate soundproofing is achieved. This results in the economic disadvantage that two to three silencers for each arrangement different construction have to be manufactured. An exchange z. B. the middle silencer between Two-pot and three-pot systems are used in the known execution

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not possible. This not only results in economic ones Disadvantages, such as B. high manufacturing and storage prices, but also disadvantages in terms of sound absorption, because every slight deviation of one of the two or three sound-absorbing elements already leads to one significant deterioration of the overall system. The present invention is now based on the object of a Show a silencer system, which can be composed of two or three silencer elements, in both cases the very expensive middle part, namely the middle silencer, is the same for both systems and furthermore both the front silencer in the case of the three-pot system and the rear silencer for both Arrangements of a relatively simple structure is, so that from a relatively low inventory both a Two-pot as a three-pot system assembled at any time can be.

The solution to the task at hand consists of a silencer system, which is characterized in that the central silencer consists of two half-shells placed one on top of the other and in its interior by means of separating plates arranged in pressed-in depressions in at least three chambers is divided by a gas guide pipes provided with different perforations in the area of the individual chambers are penetrated, the inlet of the gas pipe in the lower half-shell and the outlet in the upper half-shell takes place and furthermore the first two chambers are filled with sound-absorbing substances and that Gas guide tube has a nozzle-like constriction in the area of the entry into the second chamber. By this invention Design of the middle muffler is achieved that it is for both systems, both for the two-pot as well can be used for the three-pot system. Another very important advantage in terms of production and storage results from the fact that this muffler

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according to the invention from two half-shells placed one on top of the other exists, which are designed the same in their blank shape and only in a single, required before assembly Half-shells are flattened on one end face according to their use as a base or cover shell. It is This flattening is only required for the half-shell used as the cover shell. The embodiment according to the invention of the gas guide tube both with the different perforation and with the nozzle-like according to the invention Narrowing, a significant improvement in the silencer properties is achieved. With a sensible coupling by means of the perforation and an acceleration of the exhaust gas flow through the nozzle-like constriction. In which It has been assembled into a three-pot silencer system found to be useful that before the middle silencer a pre-silencer, consisting of only one penetrated by an at least partially perforated gas pipe Chamber is arranged. This front silencer according to the invention is extremely simple in its construction held, so that the production times and costs can be kept low, but still an optimal one Sound attenuation in connection with the central silencer according to the invention and one corresponding to the present one Invention manufactured rear silencer is given. In a Continuing the present invention, it has also been found to be useful that between the silencer and motor a pipe joining element designed as a Y-pipe is arranged, with between the two pipe sockets up to the area of the junction - up to A partition plate is arranged for the transition into the cylindrical cable of the Y-pipe. It has been shown that that just by the measure of the arrangement of a partition plate a very substantial improvement in the arrangement can be achieved. While with the well-known, trouser-tube-like If a turbulence occurs at the point of confluence, this is caused by the partition plate according to the invention

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avoided and thus a clean inflow achieved. at use as a three-pot arrangement, d. i.e. when using a front silencer, according to the present invention, the rear silencer can be particularly simple and be appropriately constructed. It has thus been found to be useful that behind the central silencer a rear muffler consisting of only one of one is arranged at least partially perforated gas duct penetrated and filled with sound absorbent chamber. Like the front silencer according to the invention, this silencer is constructed in a very simple manner, so that the assembly as a three-pot system poses no difficulties in terms of production, especially due to the embodiment according to the invention the individual components both the front silencer and the rear silencer are designed largely the same, so that apart from the filling with sound absorbing material and the different Perforation largely the same elements can be used. As a major advantage of the present Invention is considered that can even be dispensed with entirely on the front silencer, if for design reasons out only a two-pot arrangement can be used target. For this. Purpose it has been found to be useful according to the present invention that behind the Middle silencer with simultaneous omission of a front silencer a rear silencer consisting of two of one at least partially perforated and with a nozzle-like one in the area of the entry into the second chamber Constriction provided gas duct penetrated and filled with sound absorbing substance, the chambers in the gas inlet direction first chamber is smaller than the rear chamber in the gas inlet direction. A ^ ch has turned back here showed that despite the simple structure a very high Sound dampening effect can be achieved, in particular by the interaction with the central silencer according to the invention. Here, too, it has been found to be particularly useful that the gas guide tube in the area of the entry into

Item no. 03 415

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the second chamber is provided with a nozzle-like constriction. This in turn accelerates the exhaust gas flow causes and thus a more favorable coupling to the silencer. In order to achieve an even further improvement of the arrangement, it has also proven to be useful that the lic uirühriörmige tailpipe designed as a resonator is and that the two exhaust ports are perforated and surrounded by a chamber filled with sound absorbing material. By this tailpipe configuration according to the invention is an additional one Achieved sound absorption, so that the optimum can be achieved in both applications.

In the figures attached as an annex, the individual silencers or the pipe joining element are un, the Tailpipe simplified and shown schematically. Pig shows. 1 the same center silencer for both applications, Fig. 2 the front silencer as it is used in a three-pot system,

Fig. 3 the pipe joining element, what also is again the same for both arrangements,

Fig. 4 the rear silencer, as it is in the three-pot system is used,

Fig, 5 the guard silencer for the two-pot system, and FIG. 6 shows the end pipe designed as a resonator. The middle silencer shown in Fig. 1 consists of two half-shells 1 and 2, these two half-shells are in the Blank same. The flattening 3 of the half-shell used as the cover shell is only processed during the finishing process. In the veal shells, wells 4 are provided in which the dividers 5, which are divided into individual Serving chambers are arranged. The gas line pipe 6 penetrates this means of reverberation. In the area of the first chamber, perforations 7 are provided in the gas guide tube In the area of the second chamber the perforations 8 and in the area of the third chamber the perforations 9 In the inflow area of the chamber 2, a nozzle-like constriction 10 intended. In this way, the gas flow is influenced and the efficiency is improved. By

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the symmetrical design of the half-shells 1 and 2 is that;

^: inclined parting line when assembling the silencer; conditional. In Pig. 2 the front silencer required in the three-pot system is shown in a simplified and schematic manner.

■ This is a round chamber that is separated from the Coat 11 is limited. Held by floors 12 and 13, the gas pipe 14 is passed through this chamber 11. This tube has perforations 15, by means of which the

'. acoustic coupling of the chamber takes place. In the representation; according to Pig. 3 is the tube assembly element according to the invention. This tube-like tube joining element 16 also consists of two

; congruent half-shells. The welding takes place on the ! PaIz 17. In the area where the two pipe sockets come together!

; and zv / ar drawn through to the cylindrical! 'eil is one; Partition wall 18 arranged. This partition 18 is used for the line;

; of the exhaust gas flow. ;

This partition wall 18 is inserted into the pipe joining element 16 : welded in and contributes significantly to increasing the effectiveness degree at. The Pig. 3 finally shows the rear sound insulation:

pfer in the design as it is arranged when using the three-pot system. Here, too, is' ■ ι a manufacturing moderate very simple arrangement. In the cylindrical 'part 19, the bases 20 and 21, which hold the grass conduit pipe 22, are fixed. This gas pipe 22 is at least partially provided with perforations 23, these perforations being expediently arranged on the first and last third of the gas pipe lying in the region of the chamber. The space between the cylinder 19 and the Ga3leitungsrohr 22 is filled with a sound absorbing material 24. This simple structure of the rear silencer has the advantage that both the front silencer and the rear silencer, if they are required for the three-pot system, are made up of essentially the same parts.

1103 D.

In FIG. 5, the rear silencer is shown as it can be used in the two-pot system, ie in a silencer system without the front silencer. In this rear silencer, partition walls 26 and 27 and 28 are arranged ^{in the cylindrical part r>} 3 to form two chambers. In turn, the gas guide tube 29 is fastened in these partition walls and only firmly connected in connection with the partition wall 27 in order to allow free expansion as a result of the heating. This gas line pipe 29 is provided with a perforation 30 in the area of the first chamber and with a perforation 31 in the end area of the second chimney, furthermore with a nozzle-shaped constriction 32 in the area of the inflow into the second chamber. Here too, the exhaust gas flow is influenced again which is noticeable in the form of a considerable increase in efficiency. The space between the gas pipe and the cylindrical casing 25 is again filled with a sound absorbing substance 33. The clasp is in Pig. 6 which is appropriate for both versions; appearing resonator shown. This tailpipe, designed as a resonator, divides the exhaust gas flow coming from the rear muffler and leaves the trouser-tube-shaped tailpipe 34 in the two pipes 35 and 36. As is usual with mufflers, the end is cut off at an angle. This end pipe, too, is again made from two half-shells which are welded to one another at the fold 37. Around the two exhaust gas nozzles 35 and 36 there is in each case a cylindrical element 37 which has bases 38 and 39, in which the exhaust gas nozzles 35 and 36 are guided. The exhaust gas nozzles 35 and 36 are provided with perforations 40. The space between the connecting piece 35 or 36 and the cylindrical over-fitting tube 37 is filled with sound-absorbing substance 41. It has been shown that optimal damping of the arrangement can be achieved in this way.

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Claims (1)

J. Eberspächer Esslingen / Neckar, 9/23/68 ■ Appeals 1. Silencer system, consisting of a rear silencer, a middle silencer and a pipe joining part and possibly a front silencer and a double end pipe, characterized in that the middle silencer consists of two half-shells placed on top of one another and in its interior by separating plates arranged in pressed-in recesses in at least cteei chambers is subdivided, which are penetrated by a gas guide tube provided with different perforations in the area of the individual chambers, the entry of the gas guide tube in the lower half-shell and the exit in the upper half-shell and the first two chambers being filled with fast-swallowing substances and that Gas guide tube has a nozzle-like constriction in the area of the entry into the second chamber. 2. Silencer system according to claim 1, characterized in that a pre-silencer consisting of only one chamber penetrated by an at least partially perforated Gaeleitrohr is arranged in front of the central silencer. 3 · Silencer system according to claim 1 or 2, characterized in that a pipe joining element designed as a Y-pipe is arranged between the silencer and the motor, wherein between the -2- H11291H. w. η two pipe sockets up to the area of the convergence up to Transition in the cylindrical part of the Y-pipe, a partition is arranged. 4. Silencer system according to claims 1-3, characterized in that a rear silencer consisting of only one penetrated by an at least partially perforated gas guide tube and filled with sound-absorbing substance is arranged behind the central silencer. 5. Silencer system according to claim 1 or 3, characterized in that behind the middle silencer with the simultaneous omission of a front silencer, a rear silencer, consisting of two of an at least partially perforated and in the area of the entrance to the second chamber provided with a nozzle-like constriction, penetrated gas guide tube with Sound-absorbing-filled chambers, the first chamber in the gas inlet direction being smaller than the rear chamber in the gas inlet direction. 6. Silencer system according to one of the claims, characterized in that the trouser-tube-shaped end pipe is designed as a resonator and that the perforated at the exhaust pipe and surrounded by a chamber filled with sound-absorbing substance. «112 98 η. n.71