WO2007006410A1

WO2007006410A1 - Sleeve of a charge air hose which is used to fix the charge air hose to a nozzle and method for fixing the nozzle

Info

Publication number: WO2007006410A1
Application number: PCT/EP2006/006137
Authority: WO
Inventors: Thilo Möller; Klaus-Dieter Gertler; Jörg HELLFEIER; Ligia Ludwig; Peter Reichardt
Original assignee: Mündener Gummiwerk Gmbh
Priority date: 2005-07-08
Filing date: 2006-06-26
Publication date: 2007-01-18

Abstract

The invention relates to a sleeve (102) of a charge air hose (100) which is used to fix the charge air hose (100) to a nozzle (104). According to the invention, said sleeve is made of a spring-elastic material. The aim of the invention is to produce a sleeve which maintains the charge air hose on the nozzle (104) in a reliable and pressure-tight manner, and also under pressure of at least 4 bars and can be arranged in a simple manner on the nozzle (104). According to the invention, the sleeve (102) can be inserted into the nozzle (104) and at least one part of the external side (106) of said sleeve, which is preferably circulatory, comes into contact with the inner wall (108) of the sleeve such that the inner pressure which is generated in the charge air hose (100) presses the sleeve (102) against the nozzle (104), on said part of the external side (106).

Description

MUFFE OF A CHARGE AIR HOSE FOR ASSEMBLING THE LOADING AIR HOSE TO A SUSPENSION AND METHOD OF MOUNTING THE SLEEVE

The present invention relates to a sleeve of a charge air hose according to the preamble of claim 1 and a method for attaching the sleeve to a neck of an internal combustion engine according to claim 33.

The charge air hose according to the invention is used, for example, in internal combustion engines provided with a turbocharger, the charge air hose transferring the charge air compressed by the turbocharger into a charge air duct. Cooler leads and / or leads to engine entry. It has proven useful to produce the charge air hose in the hot area before the intercooler from a composite silicone elastomer, while the charge air hose between intercooler and engine inlet due to the lower temperatures there may be formed from a CR (chloroprene elastomer). The known from the prior art charge air hoses are usually pushed onto corresponding nozzles on the turbocharger, the intercooler and / or the engine so that the nozzle is received in the interior of the charge air hose before the charge air hose by means of a screw-clamp is fixed and pressure-tight mounted on the nozzle , When loading up to about 2 1/2 bar, this method has become the most economical.

However, modern turbochargers work at a much higher pressure of up to 4 bar. It has been found that the commonly used hose clamp is not able to withstand this pressure with the result that escape the valuable, charged charge air partially uncontrolled can. In addition to a power loss of the engine, this can also lead to damage to individual components of the engine and to contamination of the engine compartment with oil and exhaust parts from the charge air.

On this basis, the present invention, the object of the invention to provide a sleeve of the type mentioned above, which keeps the charge air hose at pressures up to 4 bar and more reliable and pressure-tight on the neck and in a simple manner attachable to the neck.

As a technical solution to this problem, a sleeve with the features of claim 1 and a method for attaching the sleeve with the features of claim 33 is proposed according to the invention. Advantageous developments of this sleeve and the method can be found in the respective subclaims. A trained according to this technical teaching sleeve has the advantage that the sleeve with the charge air hose is not plugged from the outside on the neck, but is inserted from the inside into the socket, wherein the sleeve is dimensioned so that they at least with a part of its outside an inner wall of the nozzle comes to rest. This has the advantage that the pressure generated in the interior by the charge air pressure pushes the sleeve against the nozzle, so that with a pressure increase is accompanied by a better seal. Consequently, such a trained charge air hose is able to enter into an air and pressure-tight connection, even at high pressures.

To attach the sleeve on the neck this needs to be compressed only seen over its circumference and then introduced into the interior of the nozzle. The memory property of the resilient material then causes the sleeve to return to its original shape and thus fits perfectly in the socket. This has the advantage that the sleeve can be compressed by muscle power and so can be mounted easily and quickly. Another advantage is that the tedious screwing of the previously used charge air clamps is omitted, so that the assembly times of this charge air hose can be significantly shortened.

In a preferred embodiment, the sleeve in the region of the voltage applied to the inner wall outer side has an outer diameter which is greater than the inside diameter of the inner wall of the nozzle. This has the advantage that the resilient material of the sleeve thereby experiences a certain bias, which thus holds the sleeve clamped in the nozzle. This prevents the charge air hose with the sleeve accidentally, for example, due to vibrations of the engine dissolves.

In another preferred embodiment, the charge air hose is integrally attached to the sleeve. This has the advantage that the unit from sleeve and charge air hose can already be factory-made, which is very cost-effective. Another advantage is that such a cohesive connection is durable.

It has proven to be advantageous to provide in the sleeve a circumferential slot into which the charge air hose can be used. As a result, a large contact surface is created to glue the charging air hose in the sleeve or to vulcanize.

In another advantageous embodiment, the charge air hose is designed as a fold or wave bellows, wherein in at least one fold or wave bottom of the charge air hose, a support ring, preferably made of a non-elastic or only slightly elastic material. This support ring has the advantage that in this way the charge air hose is reinforced and that thereby an axial expansion of the charge air hose is prevented at high pressures, but at least limited.

In a very different, preferred embodiment, the sleeve is reinforced by a spring washer. This spring ring presses the sleeve from the inside against the nozzle and thus causes an even better and more reliable anchoring of the sleeve in the nozzle. This is preferably done in addition to the bias of the sleeve, so that in this way an improved hold of the charge air hose is achieved in the nozzle.

In a preferred embodiment of the spring ring is held in a circumferential groove in the sleeve. This has the advantage that the spring ring can not slip and always remains in the correct position.

In a further preferred embodiment, the spring ring is made larger than the inside diameter of the sleeve or the groove. This has the advantage that the spring ring is used with a certain bias, so that the force acting on the sleeve spring force is even greater. Another advantage is that even with time fatiguing material due to the bias still sufficient spring force remains to push the sleeve sufficiently to the nozzle, so that the spring ring has a long life.

In a further preferred embodiment, the spring ring is designed to be open. It has proven to be advantageous to overlap the two free ends. This has the advantage that the spring ring for insertion into the groove can be compressed in a simple manner. The overlapping ends ensure that the spring ring over the entire circumference exerts sufficient force on the interior of the sleeve, so that the sleeve is held pressure-tight in the nozzle.

In another, preferred embodiment, an annular, substantially radially extending mounting collar made of a stiff material, preferably of metal, is at least partially embedded in the sleeve. This sleeve serves as a handle or stiffening of the sleeve and facilitates the insertion of the sleeve in the nozzle. It provides a particularly good grip cuff, if it extends partially axially, because then there is a better force in the axial direction.

In a further preferred embodiment, a defined contact surface is formed on an end face of the sleeve, which comes to rest on a shoulder of the nozzle. This has the advantage that a good sealing takes place here, so that no pressure can build up between the sleeve and the neck, which may possibly push the sleeve out of the neck.

It has proven to be advantageous to provide a sealing lip on the end face of the sleeve, which causes a further seal, so that the sleeve pressure-tight abuts the neck. Even a better seal can be achieved in that the sleeve comes with its front side under pretension on the shoulder of the nozzle to the plant. In yet another preferred embodiment, the sleeve is designed wedge-shaped viewed in the axial direction. As a result, the sleeve can be introduced even easier and faster in the socket.

In a completely different, preferred embodiment, at least one annular circumferential bead is formed on the sleeve, which is insertable into a corresponding groove in the neck. This bead - groove connection provides a positive connection of sleeve and socket and prevents the unintentional slipping out of the sleeve. It has proved to be advantageous to flatten the bead in the mounting direction to facilitate the insertion of the sleeve into the nozzle. Also, it has proven to be advantageous to form a right-angled shoulder on the bead against the mounting direction, to prevent accidental slipping out of the sleeve.

In a further, preferred embodiment, at least one anti-twist device is provided on the sleeve in the region of the outer side adjacent to the connecting piece. This is to prevent unintentional twisting of the sleeve and / or the charge air hose. It has proved to be advantageous to mount at least one driver provided on the outside of the sleeve as an anti-twist device, which engages in a corresponding recess in the connecting piece. This has the advantage that hereby very cost-effective a positive and reliable rotation is realized.

In an alternative, preferred embodiment, an essentially L-shaped retaining sleeve made of a rigid material, preferably of metal, is provided on an inner side of the sleeve, which rests with its axial leg on the sleeve and rests with its radial leg on the charge air hose. This has the advantage that the cuff braces the charge air hose against the sleeve and so fix both in the desired position. At the same time the cuff is together with the sleeve and to install the charge air hose in a simple manner. Yet another advantage is that also presses radially on the sleeve to press the sleeve against the inner wall of the nozzle. This effect is reinforced as soon as the working pressure is applied.

It has proved to be advantageous to provide locking means on the sleeve, which engage positively in locking means on the sleeve to hold the sleeve together with the sleeve and the charge air hose m nozzle.

Further advantages of the sleeve according to the invention and the method according to the invention will become apparent from the accompanying drawings and the embodiments described below. Likewise, according to the invention, the above-mentioned features and those which are still further developed can be used individually or in any desired combinations with one another. The embodiments mentioned are not to be understood as exhaustive enumeration, but rather have an exemplary character. Show it:

Fig. 1 is a sectional side view of a first embodiment of a nozzle with a first embodiment of a sleeve according to the invention and a charge air hose attached to the sleeve; Fig. 2 is a sectional side view of the nozzle of FIG. 1 with a second embodiment of an inventive

Sleeve and a charge air hose attached to the sleeve; 3a shows a sectional side view of a second embodiment of a connecting piece with a third embodiment of a sleeve according to the invention and a charge air hose attached to the sleeve, cut along the line IIIa-IIIa in FIG

Fig. 3b or 3c; FIG. 3b shows a cutaway front view of the connection according to FIG. 3a, cut along line NIb-MIb in FIG. 3a; FIG.

Fig. 3c is a sectional front view of the compound according to FIG

Fig. 3a, taken along line IHc - INc in Fig. 3a; 4a shows a sectional side view of a third embodiment of a nozzle with a fourth embodiment of a sleeve according to the invention and a charge air hose attached to the sleeve in a first position;

FIG. 4b shows a side view of the connection according to FIG. 4a cut away in a second position; FIG.

5 is a sectional view of a fifth embodiment of a sleeve according to the invention in the assembled state.

Fig. 6 is a schematic representation of a part of a first embodiment of a retaining ring; Fig. 7 is a schematic representation of a part of a second embodiment of a retaining ring;

Fig. 8 is a schematic representation of a part of a third embodiment of a retaining ring;

Fig. 9 is a schematic representation of a part of a support ring.

Fig. 1 shows a charge air hose 100, as it can be used for example in turbocharged internal combustion engines. This first embodiment of a sleeve 102 according to the invention is inserted inside a first embodiment of a nozzle 104. In this case, the sleeve 104 abuts with an outer side 106 on an inner side 108 of the connecting piece 104. The sleeve 104 has an outer diameter, which is about 0.4 mm larger than the inside diameter of the nozzle 104, so that the sleeve 102 is held biased in the nozzle 104 due to the elastic material. Among other things, by the bias of the sleeve 102 can be reliably held in the nozzle. It is also achieved by the bias that the sleeve still produces a sufficient bias even with age-related shrinkage of Federelastizifät the material. The nozzle 104 is cylindrical inside formed, wherein a first portion for receiving the sleeve 102 has a larger diameter than a second portion. Between the first portion and the second portion, a shoulder 110 is formed, on which an end face 1 12 of the sleeve 102 comes to rest. The sleeve 102 is U-shaped in cross-section and receives in its centrally disposed, circumferential slot 114 the actual charge air hose 100, wherein the charge air hose 100 formed from a chloroprene elastomer is vulcanized onto the sleeve 102. The charge air hose 100 designed as a bellows carries a metal support ring 116 in the respective fold valley. This support ring prevents unwanted expansion of the charge air hose 100 even at high boost pressures.

The charge air hose 100 is already factory inserted into the slot 114 of the sleeve 102 and vulcanized. When assembling the motors then only the sleeve 102 needs to be compressed over its circumference and inserted into the interior of the nozzle 104. In this case, the sleeve 102 can be compressed with muscle power. Immediately after releasing the sleeve 102 this takes on the memory properties of the elastic material back to their original shape and is now with its outside 106 on the inside 108 of the nozzle 104 at. Due to the oversize of the sleeve 102, this is now slightly biased. At the same time the sleeve 102 is pushed into the socket 104 so far until the sleeve 102 rests with its end face 112 against a stop 108 of the nozzle 104.

In a sleeve 102 designed in this way, the charge air pressure prevailing in the interior of up to 4 bar presses on the sleeve 102 and presses it against the nozzle 104. The sleeve 102 - nozzle 104 seals the better the higher the pressure rises. With this sleeve 102, the boost pressure can be increased to more than 4 bar and yet this sleeve 102 is easy to assemble. The illustrated in Figure 2 second embodiment of a sleeve 202 according to the invention has, in contrast to the sleeve 102, a circumferential, radially projecting collar 220. In this collar 220 is also a circumferential circumferential collar 222 made of metal, the collar 220 and the Muf- Fe 202 stabilized and, in particular when inserting the sleeve 202 into the nozzle 104, the sleeve 222 stiffens the collar 220.

Furthermore, a spring ring 226 is provided on an inner side 224 of the sleeve 202, which is held in a circumferential groove 228 on the inner side 224 of the sleeve 202. This spring ring 226 is semicircular in cross section, made in one piece and open at one point. The outer diameter of the spring ring 226 is about 0.4 mm larger than the diameter of the sleeve 202 in the region of the groove 228, so that the spring ring 226 can be inserted under bias into the groove 228. The spring ring 226 presses the sleeve 202 against the nozzle 104 and thus holds the sleeve 202 in the desired position, even if no boost pressure for pressing the sleeve 202 is applied.

To mount the sleeve 202 in the socket 204, the sleeve 202 is slightly compressed with its elastic material over the circumference by muscle power, so that the inserted into the sleeve 202 spring ring 226 pressed before the sleeve 202 inserted into the interior of the socket 204 becomes. When releasing the sleeve 202 this takes, as well as the spring ring 22, due to the memory effect of the material back to their original shape and is now a perfect fit on the inside of the nozzle 208 at.

Incidentally, this second embodiment of the sleeve 202 corresponds to the first embodiment of the sleeve 102 shown in FIG.

The Figs. 3a to 3c show a third embodiment of a sleeve 302, which corresponds in large parts to the second embodiment of the sleeve 202 shown in FIG. In contrast to the sleeve 202, the sleeve 302 has an im Cross-section L-shaped collar 322 and a trapezoidal cross-section formed spring ring 326. In addition, the spring ring 326 is formed open, with the two free ends overlap, as can be seen in particular Fig. 3b.

As can be seen in particular from FIG. 3c, the sleeve 302 has an anti-twist device. These include some mounted on the collar 320 driver 330, which engage in recessed into the socket 304 recesses 332. The drivers 330 and the recesses 332 are formed corresponding to each other and evenly distributed over the circumference of the collar 320.

As can be seen in particular from FIG. 3 a, the sleeve 302 has, on its outer side 306, a number of circumferential beads 334 which engage in corresponding circumferential grooves 336. The sides of the beads 334 are flattened in the mounting direction, while the beads 334 are formed perpendicular to the mounting direction. This is to facilitate the insertion of the sleeve 306 in the socket 304, while the pushing out is difficult.

At the end face 312 of the sleeve 302, a sealing lip 338 is formed, which is concave on the side of the end face 312, so that between the end face 312 and the shoulder 310 of the nozzle 304, a cavity 340 is formed. On the other side of the sealing lip 338, a free space 342 is provided, at which the same pressure prevails as in the entire charge air hose 300, so that the sealing lip 338 is pressed more or less strongly against the shoulder 310 according to the pressure, wherein the Cavity 340 reduced accordingly.

4 a and 4 b, a completely different, fourth embodiment of a sleeve 402 is shown. In this case, the sleeve 402 made of a resilient material is as in the other embodiments with their Outside 406 on an inner side of the nozzle 404 and has a circumferential slot 414, in which the charge air hose 400 engages. On the outer side 406 of the sleeve 402 some circumferential beads 434 are formed, which engage in corresponding grooves 436 in the socket 404. Here, too, the sides of the beads 434 pointing in the mounting direction are flattened, while the beads 434 pointing counter to the mounting direction are formed vertically. As in the case of the third embodiment of the sleeve 302, a sealing lip 438 is also formed on the end face 412 of the sleeve 404, which defines a cavity 440 with the neck 404. Here too, the pressure prevailing in the charge air hose 400 engages the sealing lip 438 and presses it onto the shoulder 410.

In contrast to the other embodiments, a circumferential, in cross-section L-shaped retaining sleeve 444 is provided on the inside 424 of the sleeve 402. In this case, one leg 446 is axially aligned, while the other leg 448 is radially aligned. The radial leg 448 extends into a first fold 450 of the charge air hose 400, while the axial leg extends beyond the sleeve 402 and comes to rest on the nozzle 404. In the axial leg 446 a concave 452 and a convex 454 shaft is formed, wherein the inner side 424 of the sleeve corresponding thereto has a projection 456 and a recess 458.

For mounting, the retaining sleeve 444 is now inserted into the charge air hose 400 before the charge air hose 400 is inserted into the slot 414 in the sleeve 402 and fastened there. In this case, the outer end of the radial leg 448 is located in a first fold 450 of the charge air hose 400 and supports it. Subsequently, everything is pushed into the socket 404, wherein first the sleeve 402 is pushed with its end face 412 to the shoulder 410 of the nozzle 404 zoom. In this case, the retaining sleeve 444 rests with its convex shaft 454 in front of the projection 456 (see FIG. 4a). Now, the retaining sleeve 444 is pushed axially towards the nozzle 404 with application of force. The convex wave 454 must pass over the projection Be pushed 456, which is possible only with kurzeitiger deformation of the sleeve 402. If the convex shaft 454 has passed the projection, the retaining sleeve 444 springs into its final position in which the convex shaft 454 engages in the recess 458 and in which the concave shaft 452 abuts the projection 456 (see Fig. 4b). In this case, the radial leg 448 pulls the fold 450 up to the connecting piece 404 and holds the charge air hose 400 in this position.

In the fifth embodiment shown in FIG. 5, the free end of the sleeve 510 is substantially cylindrical and can be inserted into a correspondingly formed, cylindrical receptacle in the socket 514. To stiffen the free end of the sleeve 510 in this one preferably made of resilient metal support ring 532 is inserted. In the further course of the cylindrical part of the sleeve 510, a circumferential bead 522 is formed on its outer side 515. Correspondingly, a circumferential groove 524 is formed in the receptacle of the connecting piece 514, into which the bead 522 can be inserted accurately. In the interior of the bead 522, a retaining ring 534, preferably made of a resilient metal, is inserted. In this case, the bead 522 inserted in the groove 522, together with the retaining ring 534, effects a reliable fixation in the axial direction of the sleeve 510 in the socket 514.

The sleeve 510 is made in its cylindrical portion about 0.1 mm thicker than the inside diameter of the nozzle 514 at this point, so that the sleeve due to the elastic effect of their material is held tightly pressing in the nozzle 514.

To mount the sleeve 510 on the nozzle 514 this is inserted into the nozzle 514 and thereby compressed over its circumference. The largest reduction in circumference experiences the sleeve 510 in the area of the bead 522, because it has to be compressed to the inside width of the neck 514. This is due to the elastic material of the sleeve 510 with Muscle power possible. The sleeve 510 is pushed into the socket 514 until an end face of the sleeve 510 abuts against a stop 536 of the socket 514. Once there, the bead 522 enters the groove 524 and locks the sleeve 510 in the axial direction. The sleeve is stiffened in the region of the bead 522 by the retaining ring 534, so that unintentional collapse of the sleeve 510 can not take place, and that the sleeve 510, in particular with the bead 522, is held reliably in the groove 524. The support ring 532 causes a good contact of the free end of the sleeve 510 on the nozzle 514, so that no compressed air can escape the sleeve 510 over.

In Fig. 6, a first embodiment of the retaining ring 534 A is shown, which is designed as an annular coil spring. In Fig. 7, a second embodiment of a retaining ring 534 B is shown, which is designed as a circular ring welded corrugated spring, while in Fig. 8, a third embodiment of a retaining ring 534 C is shown, which is designed as a ball spring, wherein the ball spring is a ring of small balls and wherein the balls are connected to a plastic band, and wherein in the areas between the adjacent balls a reduced cross-section is provided. All three retaining rings 534 A, 534 B and 534 C shown here can be embedded in the bead 522 and serve to stiffen the collar in this area. At the same time, these retaining rings 534 A, 534 B and 534 C are pressed in the radial direction and then spring back to their original shape, so that a simple assembly of the sleeve 510 is possible.

In Fig. 9, an embodiment of a support ring 532 is shown, which consists of a resilient metal. This support ring 532 is open, with the free ends 528 and 530 partially overlapping. In addition, at the free end 528 of the support ring 532, a stop 538, which projects radially inward, is formed, against which the other free end 530 comes to rest. This attack 538 ensures that the support ring can not be compressed arbitrarily, because he loses its supporting function at the free end of the sleeve 510 otherwise. In the idle state, the free end 530 is spaced from the stop 538 and thus reliably pushes the sleeve 510 into the socket 514.

In the sleeve 510 shown in FIG. 5, the support ring 532 is embedded in the inner contour. In another embodiment, not shown here, the support ring can also be inserted in a groove open towards the inside of the sleeve.

LIST OF REFERENCE NUMBERS

100 200 300 400 Charge air hose

102 202 302 402 510 Sleeve

104 204 304 404 514 nozzle

106 306 406 515 Outside of the sleeve 108 208 Inside of the socket

110 310 410 paragraph

112 312 412 face

114 414 slot

116 support ring 1 18 end face

220 320 collar

222 322 cuff

224 424 inside of the sleeve

226 spring washer 228 groove

330 drivers

332 recess

334 434 522 bead

336 436 524 Groove 338 438 Sealing lip

340 440 cavity

342 442 free space

444 retaining sleeve

446 axial leg 448 radial leg

450 fold 452 concave shaft

454 convex wave

456 lead

5 458 recess

528 free end

530 free end

532 Support ring 534A, B, C Retaining ring io 536 Stop

538 stop

Claims

Claims:

A sleeve of a charge air hose for attaching the charge air hose (100, 200, 300, 400) to a nozzle (104, 204, 304, 404, 514), wherein the sleeve (102, 202, 302, 402, 510) made of a resilient Material is formed, characterized in that the sleeve (102, 202, 302, 402, 510) in the neck (104, 204,

304, 404, 514) can be inserted and with at least one, preferably circumferential part of an outer side (106, 306, 406, 515) on an inner side (108) of the nozzle (104, 204, 304, 404, 514) comes to rest in that the internal pressure occurring in the charge air hose (100, 200, 300, 400) presses the sleeve (102, 202, 302, 402, 510) against the connection (104, 204, 304, 404, 514) with this part of the outside ,

2. Sleeve according to claim 1, characterized in that in the region of the inside (108) of the nozzle (104, 204, 304, 404, 514) adjacent outside (106, 306, 406, 515) of the outer diameter of the sleeve (102 , 202, 302, 402, 510) is larger than the inside width (108) of the nozzle (104.204, 304, 404, 514).

3. Sleeve according to at least one of the preceding claims, characterized in that the charge air hose (100, 200, 300, 400) is integrally formed on the sleeve (102, 202, 302, 404, 510).

4. Sleeve according to at least one of the preceding claims, characterized in that the sleeve (102, 202, 510) is compressible over its circumference bar and so in the nozzle (104, 202, 514) can be introduced.

5. Muff according to at least one of the preceding claims, characterized in that the sleeve (202, 302) by a spring ring (226, 326) is reinforced.

6. Sleeve according to claim 5, characterized in that the spring ring (226, 326) the sleeve (202, 302) against the

Socket (204, 304) presses.

7. Muff according to at least one of claims 5 or 6, characterized in that the spring ring (226, 326) in a circumferential groove (228) in the

Sleeve (202, 302) is held.

8. Sleeve according to at least one of claims 5 to 7, characterized in that the spring ring (226, 326) is greater than the inside diameter of the

Sleeve (202, 302) or groove (228).

9. Sleeve according to at least one of claims 5 to 8, characterized in that the spring ring (326) is designed to be open.

10. Sleeve according to claim 9, characterized in that the free ends of the spring ring (326) overlap.

5

11. Muff according to at least one of the preceding claims, characterized in that the sleeve (102, 202, 302, 402) can be pressed in the axial direction. 0

12. A sleeve according to claim 11, characterized in that the sleeve (102, 202, 302, 402) has a memory property, so that the sleeve (102, 202, 302, 402) finds its way back to its original shape after completion of the 5 Eindrückvorganges ,

13. Muff according to at least one of the preceding claims, characterized in that in the sleeve (102, 202, 302, 404) is provided a circumferential slot (114, o 414) for receiving the charge air hose (100, 200, 300, 400) ,

14. Muff according to at least one of the preceding claims, characterized in that the sleeve (102, 202, 302, 402) on the charge air hose (100,

200, 300, 400) is vulcanized.

15. Muff according to at least one of the preceding claims, characterized in that the charge air hose (100, 200, 300, 400) in the manner of a

Wrinkle or bellows is formed.

16. A sleeve according to claim 15, characterized in that in at least one fold or wave bottom of the charge air hose (100, 200, 300, 400), a support ring (118) is provided.

17. A sleeve according to at least one of the preceding claims, characterized in that the sleeve (202, 302) an annular, substantially radially extending sleeve (222, 322) made of a rigid

Material, preferably of metal.

18. Sleeve according to claim 17, characterized in that the sleeve (322) partially extends axially.

19. A sleeve according to at least one of the preceding claims 17 or 18, characterized in that the sleeve (222, 322) in the sleeve (202, 302) is embedded.

20. A sleeve according to at least one of the preceding claims, characterized in that on a front side of the sleeve (102, 202, 302, 402) a defined contact surface is formed, which on a shoulder (110, 310, 410) of the connecting piece (104, 204, 304, 404) comes to rest.

21.Muffle according to at least one of the preceding claims, characterized a radially extending sealing lip (338, 438) is formed on one end face of the sleeve (304, 404), which abuts a shoulder (310, 410) of the connecting piece (304, 404).

22 22. Sleeve according to at least one of the preceding claims 20 or 21, characterized in that the end face under bias on the shoulder (110, 310, 410) of the nozzle (104, 204, 304, 404) comes to rest. 0

23. Muff according to at least one of the preceding claims, characterized in that on the outer side (306, 406, 515) of the sleeve (302, 402, 510) at least one annular circumferential bead (334, 434, 522) 5 is formed, the into a corresponding circumferential groove (336,

436, 524) in the nozzle (304, 404, 514) is insertable.

24. A sleeve according to claim 23, characterized in that o in the bead (522) has a resilient retaining ring (334A, 334B,

334C) is provided.

25. Sleeve according to claim 24, characterized in that the retaining ring (334A, 334B, 334C) is designed as a spiral spring, wave spring or ball spring.

26. Sleeve according to claim 23, characterized in that the bead (334, 434) is formed flattened in the mounting direction.

27. Sleeve according to at least one of the preceding claims, characterized in that the bead (334, 434) opposite to the mounting direction has a right-angled shoulder.

28, sleeve according to at least one of the preceding claims, characterized in that on the sleeve (302) in the region of the nozzle (304) adjacent the outside at least one rotation is provided.

29. A sleeve according to claim 28, characterized in that the rotation of at least one on the outside (306) of the sleeve (302) provided driver (330) which engages in a corresponding recess (332) in the socket (304), so that the sleeve (302) is positively secured against rotation.

30. Muff according to at least one of the preceding claims 28 or 29, characterized in that the rotation is constructed analogous to tongue and groove.

31. A sleeve according to at least one of the preceding claims, characterized in that on an inner side of the sleeve (402) has a substantially cross-sectionally L-shaped retaining sleeve (444) made of a rigid material, preferably metal, provided with its axial leg ( 446) bears against the sleeve (402) and rests with its radial leg (448) on the charge air hose (400).

32. Sleeve according to claim 31, characterized in that on the sleeve (402) locking means are provided which correspond with locking means on the retaining sleeve (444), so that the retaining sleeve (444) in a defined position on the sleeve

(402) is attachable.

33. A method for attaching a sleeve according to at least one of the preceding claims to a nozzle, characterized by the following steps:

a) pressing the sleeve over the circumference such that the maximum diameter of the sleeve is reduced, without the sleeve is pressed radially, b) hold the sleeve in this position, c) insert the sleeve into the nozzle, and d) release the Circumference of the neck, so that the sleeve due to the memory property again assumes its original shape and rests with a portion of its outside on the inner wall of the nozzle.

34. The method according to claim 33, characterized in that in step a) the sleeve is pressed together with the spring ring that in step b) the sleeve together with the

Spring ring is held in the position that in step c) the sleeve is inserted together with the spring ring in the neck, and that in step d) the sleeve, together with the spring ring back to its original shape.