DE8222490U1 - DEVICE FOR JOINTLY CONNECTING THE ENGINE AND THE EXHAUST SYSTEM - Google Patents

Description

DR. ING. HANS LICHT! · "BfPL.-I ΝΟ.'Ή EI N EU * 'LIC HTI DIPL.-PHYS. DR. JOST LEMPERT PATENTANWÄLTE

D-7500 KARLSRUHE 41 (G ROTZ I NGENl · DURLAC H ER STR. 31 (HOCHHAUS)

TELEPHONE (0721) 4851!

IWK Regulator and Kompensatoen GmbH August 6, 1982

Singerstrasse

D-7513 Stutensee 6434/82 Le

Device for the articulated connection of engine and exhaust system

The innovation relates to a device for the articulated connection of the engine and exhaust system in motor vehicles, consisting of at least a flexible line part, such as Weil pipe, metal hose or the like, with with the ends of the line part connected support parts for external attenuators.

Such a device for the articulated connection of two lines, in particular the exhaust gas outlet of an engine and the exhaust system for motor vehicles is described in DE-OS 28 38 930. Such devices are used to allow greater relative movements between the engine and exhaust system while enabling longer service lives to be approved for the exhaust system. With the known facility are two at the connection ends of a single hose or a wound hose arranged connecting flanges penetrated by bolts and resiliently tensioned by means of the same by a spring element.

The construction there is relatively complex and therefore offers starting points for damage. Furthermore Although relative movements of the engine and exhaust system can be absorbed in the known device, but are due to the Arrangement of the spring elements this is not decoupled, so that vibrations of the engine can be transferred to the exhaust system, where it can lead to noise and premature wear. It is true has already been proposed that in addition to the spring element, if necessary. attenuators combined with this must be provided. Basically only the damping properties of every real spring are discussed here addressed. Due to the basic provision of a spring element with its resilient and resonance vibrations accessible properties, attempts to suppress them by applying stimulus forces complete decoupling and sufficient suppression of the noise of the exhaust system cannot be achieved.

The innovation is therefore based on the task of a simple and therefore

stable and reliable device for connecting engine and exhaust |

to create a system of a motor vehicle that has a reliable §

coupling of the exhaust system from the movements of the engine and thus an optimal noise reduction of the exhaust system is guaranteed.

According to the innovation, the task mentioned in a facility of initially mentioned type solved in that the support parts each other axially displaceable on the outside of the line part with training extend over from housing-like pockets and that the pockets absorb damping cushions made of pressed metal wire.

■ 2 ι- * · * * ■ ■ * * ** ■ ♦ · ♦ ♦

According to the innovation, a spring element is no longer used at all, but a concrete, highly effective damping cushion made of compressed metal wire, such as from compressed wire mesh, wire mesh, wire in random layers or the like., The unier alien conditions after deflection from its unloaded form asymptotically returns to its rest form through acting forces and has no resilient properties in the form of an overshoot in the other direction that occurs when the load is deflected in one direction. Furthermore, through this embodiment can be dispensed with according to the innovation, a complex construction provided with seated clamping nuts bolts. the housing-like pockets forming support parts are rather all rigid connected to the respective ends, advantageously it can be provided that a part of the support parts by punchings and corresponding formations at one end of the corrugated pipe tightly attached connection pipe section is formed. Compared to the known devices, it is simple in terms of production technology Production of the device according to the innovation is therefore possible. Due to the innovation according to the design, both train and Compressive loads of the Weilrohr are absorbed. Here is at preferred embodiments either one or the other of damping cushions arranged one behind the other in the axial direction Pressure charged. Alternatively, it can also be provided that a damping cushion is arranged only between two abutments In addition, it is firmly connected to the support parts, for example by welding, gluing or the like, which is then also in tension can be claimed.

If desired, it can be provided in a further embodiment that in each case several support parts arranged one behind the other for the

Damping cushions are provided which are alternately rigidly connected to one or the other end of the line part.

In order to keep the damping cushions radial, they are arranged in a housing with housing-like pockets, which are through the Support parts are formed and form abutment surfaces for the cushioning pad. It is provided that the support parts are in have substantially radially extending end faces as an abutment for the damping cushions, which are at the respective ends of the Line part attached support parts are formed. Alternatively it can also be provided that at least one wall closure has a housing-like pocket for a cushioning cushion through a an annular part arranged essentially centrally penetrating the rod through the damping cushion, the rod at least an assigned other support part freely passes through and the Sit the cushioning pad with a central opening on the rod. In a further embodiment it is provided that at least a support part is a radially extending, double-layer bend has, the two end faces of which each form an abutment.

Further advantages and features of the innovation emerge from the claims and from the following description in the exemplary embodiment are explained in detail with reference to the drawings. It shows:

Figure 1 shows a first embodiment of the innovation

proper device for articulated connection with two alternative brackets for the cushioning pads;

Figure 2 shows another embodiment of the innovation

proper parts;

Figure 3 shows another embodiment of the innovation

proper parts; and

Figure 4 shows another embodiment of the innovation

GSM device for articulated connection.

A device for an articulated connection between the engine and exhaust systems in motor vehicles, according to the embodiment of the figure, initially consists of a bellows or corrugated pipe 11 as an articulated line part. In the corrugated pipe 11, a pipe socket 12 is arranged, which is firmly connected with its one end 13 to a first end 14 of the corrugated pipe 11 is. At the same end 14, a connecting flange 16 is attached, with which the innovation according to the device or the corrugated tube 11 is attached to an engine (not shown) of a motor vehicle. That the other end 17 of the corrugated pipe 11 is either directly or, as in the illustrated embodiment, via a fixed to this end 17 connected pipe section 18 connected to the exhaust system (not shown) of the motor vehicle. The other end 19 of the pipe socket ends essentially freely within the pipe section 18. Through this configuration creates a flexible, tight line for the gas flow from the engine to the exhaust system.

At the ends 14, 17 the corrugated pipe 11 are rigid, for example through Welding tubular support parts 21, 22 and 22 'attached, the are facing each other. The support parts 21, 22, 22 'are in

■ I * t * I «

■ ft · »· · ■

essentially in their end regions opposite the ends 14, 17 with abutments 23, 24, 26 and 23 *, 24 ', 26' formed from pressed metal wire on support parts for Dämpfungski ssen 27, 28. The abutment 23 is formed on the support part 21 by a radially outwardly directed double-layer bend or fold of the tubular support part. The damping cushions 27, 28 rest on both sides of the abutment 23. The abutment 24 (upper half of FIG. 1) is formed by an obliquely outwardly directed bend, that is to say an extension to a sleeve, of the support part 22, which basically extends axially. The abutment 26 is an obliquely inwardly bent section of a support part designed as a housing part 29, which is firmly connected in the radial plane of the abutment 23 to the support part 22 as a flanged, drawn-in sheet metal ring on the outside of the sleeve. The damping cushions 27 and 28 rest on the one hand on the abutment 24 and, as I said, on one side of the abutment 23 and on the other hand on the abutment 25 and on the other side of the abutment 23. The support parts 21, 22 with the abutments 24, the housing part 29 with the abutment 26 and the essentially axially extending sections of the support 21 on both sides of the abutment 23 form a housing 31 or two housing-like pockets for the two damping cushions 27, 28.

The configuration shown in the lower part of FIG. 1 corresponds essentially that of the one in the upper part of FIG. 1, only the support part 22 'is not provided with an axially extending section the cushioning pad 27 is drawn, but ends with a conical Extension as an abutment 24 '. At this part is a in cross section Trough-shaped open BJechring attached as a housing part 32 which is trapezoidal in the section shown, with one leg of the Trapezoid is attached to the abutment 24 'and the other leg

the second abutment 26 'forms. The sheet metal ring is on the conical extension of the left tubular support part 22 'and the right-hand damping ski 28 pulled up and tightened by means of screws over molded flaps. The housing part 32 and the axially extending portions of the support member 21 also form here housing-like pockets for the damping cushions 27, 28. It should be emphasized that the upper and lower parts of FIG. 1 are each cut as a section Axially symmetrical formations can be seen and accordingly the damping cushions are annular. Of course are the Ausgsstaltung shown in the upper part of Figure 1 and the The embodiment shown in the lower part of FIG. 1, the reference numerals of which are each provided with a dash, not with a and the same device but rather provided as an alternative.

The device shown for the articulated connection between an engine and an exhaust system of a motor vehicle is one-! on the other hand through the corrugated pipe 11 and connected to the end 17 thereof

Pipe piece a completely tight line for the gas flow and is on the other hand carried by the support parts 21, 22 and 21 ', 22'. Their formation with abutments 23, 24, 26 or 23 ', 24', 26 ' for damping cushions made of pressed metal wire completely decouples the exhaust system from the engine and its vibrations and a reliable connection while suppressing resonance vibrations.

Instead of the circularly symmetrical configuration of FIG. 1, accordingly According to the other figures, individual damping cushions can also be distributed largely evenly around the circumference of the flexible line parts or corrugated pipes 11, which are connected between the ends of the corrugated pipe 11 flange-like parts are newly arranged in the following manner.

A support part 41 is initially on the end 17 of the corrugated pipe 11 to be connected to the exhaust system (not shown) (cf. Figure 1) firmly connected, while a support part 42 with the with d «? M Motor to be connected end 13 of the corrugated pipe 11 is firmly connected. Although not shown in detail, the Support parts 41, 42 but have axially extending regions. At their ends, the support parts are again in a corresponding shape adaptation on damping cushions 47, 48 as housing-like pockets with abutments 43, 44 for the damping sleeves made of metal wire 47, educated. The damping cushions 47, 48, like the abutment 43, have central openings through which a rod 49 is inserted is, on the one hand, firmly, for example by welding is connected to the abutment 44 and, on the other hand, carries a plate as a further abutment 46 at its opposite end. The abutments 44, 46 are thus indirectly with the end 13 of the corrugated pipe 11 and the abutment 43 with the end 17 of the Corrugated pipe 11 in connection. The damping skis 47, 48 are on the one hand between the abutment 44 and the abutment 43 and on the other hand, arranged between the abutment 43 and the abutment 46, so that a damping in both the reciprocating and the forward movement caused by vibrations. Furthermore, the abutments 44, 43 overlap the damping cushions 47, 48 also partially in the manner of a housing in the axial direction, so that lateral movements are also absorbed and dampened. In addition, the cushioning pads 47, 48 are held by the rod 49.

In the figure 3 are - similar to the embodiment of Figure 2 - the Damping sleeves made of metal wire, likewise in a housing 61 arranged with individual pockets, which through with a support part 5 1 and over this with the end 17 of the corrugated pipe 11

111 ι. · T

ill I · · · ·

I · <I I Iv t

■ 4 I lit

• «I · · Cl III

• · · I I I I t

I · t · Il Il ι

I I

connected abutment 53, 53 'is formed, the abutment 53 is formed in one piece on the support part 51 and the abutment 53 'is rigid with the abutment 53, for example by welding connected is. The support and damping arrangement also has an end 13 of the corrugated pipe 11 (cf. again Figure 1) rigidly connected support part 52, which if necessary. even can be formed by the connecting flange 16 (Figure 1). In any case, the support part 52 is rigid with a rod 49 corresponding Rod 59 connected, on which an abutment 54 rests centrally between the two abutments 53, 53 '. The cushioning cushions 57, 58 are on one side between the abutment 53 'and the abutment 54 and, on the other hand, arranged between the abutment 54 and the abutment 53 and enclosed in the manner of a housing. The function this arrangement is basically the same as that of the previous one described arrangement.

Another embodiment of the device according to the invention for the articulated connection of the engine and exhaust systems of a motor vehicle is shown in FIG. As far as the same parts are present, they are given the same reference numerals as in the previous ones Figures designated. A pipe socket 12 is arranged in a corrugated pipe 11, which is attached with its end 13 to the end 14 of the corrugated pipe 11. Seated on the same end 14 of the corrugated pipe 11 a connecting flange 16. At the other end 17 of the corrugated pipe 11, a pipe section 18 is connected to this, which is connected to the exhaust gas section can be connected and has two protruding flange sections 71. At the outer ends of the connecting flange 16 or the flange part 71, in turn, housing-like pockets with abutments 73 are provided for a damping cushion 77. The cushioning pad 77 is not only simply arranged between the abutments 73,74, but firmly connected to them, so that it is also on the abutments exerted tensile stresses this absorbs. The abutments 74,

- 10 -

are in turn fixed to the connecting flange serving as a supporting part 16 or the flange section 71 of the support part 18 connected * This configuration of the device for articulated Connection between the engine and exhaust systems of motor vehicles ensures, on the one hand, a reliable seal of the gas flow from the engine to the exhaust system and on the other hand, it provides a load-bearing Joint and damper construction with damping pads made of pressed metal wire, for example made of precious metal, the one reliable decoupling of the vibrations of the engine from the exhaust system, thus good sound absorption while preventing Offers resonances.

Further refinements are within the scope of the innovation concept possible, whereby it is essential that attenuators are made from pillow-like Crimped wire used and arranged between at least two rigidly connected to the ends of the corrugated pipe abutments are, where, if only two wide bearings are available, the wire cushions are firmly connected to these. Are three abutments in axial succession or several are provided, the wire mesh cushions can simply be inserted between them. Instead of training with a corrugated pipe devices with two parallel or twin corrugated pipes can be provided, which together in a metering according to Establishment to be kept. The design of the abutments and the damping cushions can also vary to get voted. Finally, more than three abutments with more than two intermediate damping elements can be provided, For example, in the embodiment of Figure 3, the rod 59 could be extended to the right, there a further abutment 54 corresponding Have abutments, so that a damping element can also be arranged between the abutment 53 and the further abutment could.

- 11 -

(Ml I ■

In addition, the abutment 53 could be a mirror image Arrangement on the abutment 53 'may be provided corresponding abutment so that between this and the other on the Bar seated abutment also arranged a damping cushion is, and so on. The same basically applies to the other configurations.

The in the above description, in the drawing and in the. Features of the innovation disclosed in the claims can be essential both individually and in any combination for the realization of the innovation concept.

t
I. Reference symbols i ι
1 1 y
I I t
I t *
Il *
lit Il 1\
- ' 1
■ Ϊ) I ■ l
JJ J ι ι ·
Ji »<. ' ■ I Support part 11 corrugated pipe 6434/82 Le Il 12 pipe sockets 51 Abutment 13 end (of 12) 52 14 end (of 11) 53 16 connecting flange 53 ' Cushioning skis 17 end (of 11) 54 Il 18 pipe section 57 •Rod 19 end (of 12) 58 casing 21 support part 59 Flange part 22 " 61 Abutment 22 '" 71 Il 23 abutments 73 Cushioning pads 24 » 74 24 '" 77 26 " ₂₆ 1 " 27 cushioning pads 28 " 29 Housing part 31 housing 32 housing part I 41 support part 42 " 43 abutments 44 " 46 " 47 cushioning pads 48 " 49 star

Claims (7)

• · \ 'DR. ING. HANS LICHTP * 4 DIPL> 4NG. H ^ NfiR LlCHTI DIPL.-PHYS. DR.JOST LEMPERT PATE NTAN WALTE j D-7500 KARLSRUHE 41 (GRÖTZ1NGEN) DUKLAC H ER STR. 31 (HOCH HAUS) TELEPHONE (O72I) 48511 W K Steuerung und Kompensatoren GmbH August 6th, 1982 Singerstrasse D-7513 Stutensee 6434/82 Le PROTECTION CLAIMS 1. Device for the articulated connection of the engine and exhaust system in motor vehicles, consisting of at least a flexible line part, such as a corrugated pipe, metal hose or Like., with supporting parts connected to the ends of the line part for external attenuators, characterized in that, that the support parts are axially displaceable to each other on the outside of the line part with the formation of housing-like Reach over pockets and that the pockets absorb damping cushions made of pressed metal wire. 2. Device according to claim 1, characterized in that several support parts (23, 24, 24 ', 26, 26', 43, 44, 46, 53, 53 ', 54) arranged one behind the other are provided for the cushioning pads which are alternately rigidly connected to one or the other end (14 or 17) of the line part (11). must 3. Device according to claim 1 or 2, characterized in that that the support parts have substantially radially extending end faces as an abutment for the damping cushions, the support parts (21; 41, 42; 51, 52) attached to the respective ends (14 or 17) of the line part (11) are formed. 4. Device according to one of the preceding claims, characterized in that at least one wall termination has a housing-like Pocket for a cushioning cushion through a cushioning cushion (47, 48, 57, 58) essentially in the center penetrating rod (49, 59) arranged ring part (46, 53) formed are, wherein the rod (49, 59) at least one associated other support part (43, 53 ", 53) freely traversed and the Sit the cushioning pad with a central opening on the rod (49, 59). 5. Device according to one of claims 1 to 4, characterized in that that at least one support part (21, 21 ') has a radially extending, double-layer bend (23, 23'), the both end faces each join an abutment. 6. Device according to one of the preceding claims, characterized characterized in that a part of the abutment by punching and / or by molding at one end (17) of the flexible connecting piece (11) tightly connected connecting pipe piece (18) is formed. 7. Device according to one of claims 2 to 6, characterized in that that the damping cushion made of pressed metal wire is firmly connected to the support parts (73, 74).