Charge-air hose assembly

• US 20100140923A1
• Filed: 01/04/2010
• Published: 06/10/2010
• Est. Priority Date: 07/06/2007
• Status: Active Grant

• Current Assignee: ContiTech MGW GmbH (Continental AG)
• Original Assignee: ContiTech MGW GmbH (Continental AG)
• Inventors: Hellfeier, Jörg, Hoffmann, Helmut, Siebels, Karl-Heinz, Bamberger, Dieter, Reichardt, Peter, Brill, Hartmut
• Granted Patent: US 8,267,435 B2
• Time in Patent Office: Days
• US Class Current: 285/24
• CPC Class Codes: F02M 35/10137 Flexible ducts, e.g. bellows or hoses
• CPC Class Codes: F02M 35/10144 Connections of intake ducts to each other or to another device
• CPC Class Codes: F02M 35/10157 Supercharged engines
• CPC Class Codes: F16L 33/16 with sealing or securing means using fluid pressure
• CPC Class Codes: F16L 37/06 tightened by fluid pressure
• CPC Class Codes: F16L 37/0885 with access to the split elastic ring from a radial or tangential opening in the coupling
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A charge-air hose assembly includes a charge-air hose (2) for connecting to a pipe stub (4). The charge-air hose (2), in the assembled position, is pushed into the pipe stub (4) in such a way that overpressure occurring in the charge-air hose (2) presses the charge-air hose (2) radially outward against the radial inner wall (6) of the pipe stub (4). The charge-air hose (2) is assigned a latching device which, during the insertion of the charge-air hose (2) into the pipe stub (4), latches with the pipe stub (4) so as to axially fix the charge-air hose (2) to the pipe stub (4) in a predetermined axial position of the charge-air hose (2) relative to the pipe stub (4).

Claims

1. A charge-air hose assembly comprising:

a pipe stub having a radial inner wall;

a charge-air hose insertable into said stub whereat said charge-air hose assumes a predetermined axial position relative to said pipe stub;

said pipe stub and said charge-air hose conjointly defining a sealing interface at said predetermined axial position so as to permit an overpressure in said charge-air hose to press said charge-air hose radially outwardly against said radial inner wall thereby providing a seal at said sealing interface; and

,

a latching device for latching said charge-air hose to said pipe stub to axially fix said charge-air hose to said pipe stub at said predetermined axial position when said charge-air hose is inserted into said pipe stub.

2. The charge-air hose assembly of claim 1, wherein said charge-air hose has a radial outer surface;

and, said latching device is arranged on said outer surface.

3. The charge-air hose assembly of claim 2, said latching device including at least one latching cutout assigned to said pipe stub;

and, at least one latching projection assigned to said charge-air hose for engaging said latching cutout when said charge-air hose is in said predetermined axial position.

4. The charge-air hose assembly of claim 3, wherein said latching projection is spring biased in a radial outward direction;

and, said latching cutout extends in said radial outward direction.

5. The charge-air hose assembly of claim 4, wherein said latching cutout is formed in or on said pipe stub.

6. The charge-air hose assembly of claim 4, wherein said latching cutout is a slit formed in said pipe stub.

7. The charge-air hose assembly of claim 5, wherein said latching cutout is a slot formed in said radial inner wall of said pipe stub.

8. The charge-air hose assembly of claim 3, wherein said latching cutout is a first latching cutout and said latching projection is a first latching projection;

and, wherein said charge-air hose assembly further comprises a second latching cutout assigned to said pipe stub and disposed in spaced relationship to said first latching cutout; and

, a second latching projection assigned to said charge-air hose and disposed in spaced relationship to said first latching projection.

9. The charge-air hose assembly of claim 8, wherein said latching device includes a spring ring defining said first and second latching projections and being resiliently biased in a radial direction.

10. The charge-air hose assembly of claim 9, further comprising an essentially form-stable holder for connecting said spring ring to said charge-air hose.

11. The charge-air hose assembly of claim 10, wherein said form-stable holder is connected in a form-fitting manner to said charge-air hose in an axial direction.

12. The charge-air hose assembly of claim 11, wherein said charge-air hose has a peripherally extending groove formed in said outer surface thereof and said form-stable holder is accommodated in said peripherally extending groove.

13. The charge-air hose assembly of claim 10, wherein said form-stable holder is configured as a holding ring.

14. The charge-air hose assembly of claim 13, wherein said holding ring has an outer surface;

and, said holding ring has a peripherally extending groove formed in said outer surface for accommodating said spring ring therein.

15. The charge-air hose assembly of claim 14, wherein said spring ring has a plurality of radially inwardly projecting segments for supporting said spring ring on said charge-air hose or on said holding ring;

and, said latching projections project radially outwardly.

16. The charge-air hose assembly of claim 9, wherein said spring ring is configured to be open at a location along the periphery thereof so as to define bent-over free end segments extending substantially in a radial direction.

17. The charge-air hose assembly of claim 1, wherein said charge-air hose is inserted into said pipe stub in a predetermined direction;

said radial inner wall of said pipe stub defining a first surface of said sealing interface; and

, said pipe stub has a clear inner width at said first surface which becomes less and less in said predetermined direction.

18. The charge-air hose assembly of claim 17, wherein said first surface is configured to have a circular arc or conical shape when viewed in section.

19. The charge-air hose assembly of claim 18, wherein said charge-air hose has a front end insertable into said pipe stub;

said front end defines a second surface of said sealing interface at said front end; and

, said second surface is essentially complementary to said first surface at said sealing interface when viewed in cross section.

20. The charge-air hose assembly of claim 19, wherein said assembly further comprises an axial stop effective in said predetermined direction.

21. The charge-air hose assembly of claim 20, wherein said pipe stub defines an axial direction;

and, said stop is disposed in said axial direction so as to fix said predetermined axial position and to cause said latching device to latch to said pipe stub when said charge-air hose arrives at said predetermined axial position relative to said pipe stub.

22. The charge-air hose assembly of claim 21, wherein said axial stop is defined by a shoulder formed on the radial inner wall of said pipe stub.

23. The charge-air hose assembly of claim 16, further comprising means for fixing said predetermined axial position of said charge-air hose in a peripheral direction relative to said pipe stub when said charge-air hose is inserted into said pipe stub.

24. The charge-air hose assembly of claim 23, wherein said pipe stub has a free end and defines an axial direction;

and, said fixing means comprises a slot extending from said free end in said axial direction for receiving and accommodating said bent-over free end segments when said charge-air hose is inserted into said pipe stub.

25. The charge-air hose assembly of claim 1, wherein said latching device defines a releasable latch connection between said charge-air hose and said pipe stub when said charge-air hose is in said predetermined axial position.

26. The charge-air hose assembly of claim 24, wherein said pipe stub has a radial outer wall surface;

and, said bent-over free end segments extend beyond said radial outer wall surface.

27. The charge-air hose assembly of claim 1, wherein said pipe stub has a free end facing toward said charge-air hose when said pipe stub and charge-air hose are assembled;

and, said free end has a peripherally extending bevel formed thereon to facilitate the insertion of said charge-air hose into said pipe stub.