Charge-air hose assembly

• US 8,267,435 B2
• Filed: 01/04/2010
• Issued: 09/18/2012
• Est. Priority Date: 07/06/2007
• Status: Expired due to Fees

• Current Assignee: ContiTech MGW GmbH (Continental AG)
• Original Assignee: ContiTech MGW GmbH (Continental AG)
• Inventors: Brill, Hartmut, Hoffmann, Helmut, Reichardt, Peter, Bamberger, Dieter, Siebels, Karl-Heinz, Hellfeier, Jörg
• Primary Examiner(s): Dunwoody, Aaron
• Application Number:
  US12/654,786
• Publication Number:
  US 20100140923A1
• Time in Patent Office: 988 Days
• Field of Search: 285/319, 285/321, 285/307
• US Class Current: 285/321
• 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 wall and a longitudinal axis defining an axial direction;

a charge-air hose having a radial outer surface and being insertable into said pipe stub in a manner so as to cause an overpressure in said charge-air hose to press said charge-air hose radially outwardly against said radial wall of said pipe stub,

said charge-air hose having an insertion end and said pipe stub having a contact region at said radial wall receiving said insertion end in contact engagement therewith when said charge-air hose is inserted into said pipe stub in said axial direction to an axial position;

said insertion end having a cross section that is complementary in shape to a cross section of said contact region so as to cause said insertion end and said contact region to conjointly define a seal between said pipe stub and said charge-air hose at said axial position in response to said overpressure;

a latching device for fixing said charge-air hose in said pipe stub at said axial position of said charge-air hose relative to said pipe stub as said charge-air hose is inserted into said pipe stub in said axial direction;

said latching device including;

a holder mounted on said outer surface of said charge-air hose;

an annular spring disposed in said holder with said holder and said annular spring being insertable into said pipe stub as part of said charge-air hose;

said annular spring being resiliently biased in an outward radial direction; and

,

said radial wall of said pipe stub having a slot formed therein for receiving said annular spring therein when said charge-air hose is inserted into said pipe stub causing said charge-air hose to latch with said pipe stub at said axial position.

2. The charge-air hose assembly of claim 1, wherein said holder is an essentially form-stable holder for holding said annular spring to said charge-air hose.

3. The charge-air hose assembly of claim 2, wherein said form-stable holder is connected in a form-fitting manner to said charge-air hose in the axial direction.

4. The charge-air hose assembly of claim 3, 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.

5. The charge-air hose assembly of claim 4, wherein said form-stable holder is configured as a holding ring.

6. The charge-air hose assembly of claim 5, 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 annular spring therein.

7. The charge-air hose assembly of claim 6, wherein said annular spring has a plurality of radially inwardly projecting segments for supporting said annular spring on said charge-air hose or on said holding ring;

and, said annular spring having a latching projection formed thereon projecting radially outwardly to engage said slot at said axial position when said charge-air hose is inserted into said pipe stub.

8. The charge-air hose assembly of claim 7, wherein said annular spring 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.

9. The charge-air hose assembly of claim 8, further comprising an axial stop provided for said charge-air hose which is effective in said axial direction.

10. The charge-air hose assembly of claim 9, wherein said axial stop is disposed in said axial direction so as to fix said axial position and to cause said latching device to latch to said pipe stub when said charge-air hose arrives at said axial position relative to said pipe stub.

11. The charge-air hose assembly of claim 10, wherein said axial stop is defined by a shoulder formed on the radial inner wall of said pipe stub.

12. The charge-air hose assembly of claim 8, further comprising means for fixing said charge-air hose in a peripheral direction relative to said pipe stub when said charge-air hose is inserted into said pipe stub.

13. The charge-air hose assembly of claim 12, wherein said pipe stub has a free end;

and, said fixing means comprises a slot formed in said pipe stub and 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.

14. The charge-air hose assembly of claim 13, 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 axial position and inserted into said pipe stub.

15. The charge-air hose assembly of claim 14, wherein said pipe stub has a radial outer wall surface;

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

16. 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 said 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.

17. The charge-air hose assembly of claim 1, wherein said slot is a peripherally extending slot formed in said radial wall.

19. The charge-air hose assembly of claim 17, wherein said charge-air hose is a bellows charge-air hose.

18. A charge-air hose assembly comprising:

a pipe stub having a radial wall and a longitudinal axis defining an axial direction;

a charge-air hose having a radial outer surface and being insertable into said pipe stub in a manner so as to cause an overpressure in said charge-air hose to press said charge-air hose radially outwardly against said radial wall of said pipe stub,

said charge-air hose having an insertion end and said pipe stub having a contact region at said radial wall receiving said insertion end in contact engagement therewith when said charge-air hose is inserted into said pipe stub in said axial direction to an axial position;

said insertion end having a cross section that is complementary in shape to a cross section of said contact region so as to cause said insertion end and said contact region to conjointly define a seal between said pipe stub and said charge-air hose at said axial position in response to said overpressure;

a latching device for fixing said charge-air hose in said pipe stub at said axial position of said charge-air hose relative to said pipe stub as said charge-air hose is inserted into said pipe stub in said axial direction;

said latching device consisting of a holder mounted on said outer surface of said charge-air hose;

an annular spring disposed on said holder and said annular spring being resiliently biased in an outward radial direction toward said radial wall of said pipe stub;

said annular spring having a segment thereof defining a projection which projects outwardly in said radial direction; and

,

a peripherally extending slot formed in said radial wall of said pipe stub for receiving said projection therein when said charge-air hose is inserted into said pipe stub causing said projection to engage said slot to latch said charge-air hose with said pipe stub at said axial position.

20. A charge-air hose assembly comprising:

a pipe stub having a radial wall and a longitudinal axis defining an axial direction;

a charge-air hose having a radial outer surface and being insertable into said pipe stub in a manner so as to cause an overpressure in said charge-air hose to press said charge-air hose radially outwardly against said radial wall of said pipe stub,

said charge-air hose having an insertion end and said pipe stub having a contact region at said radial wall receiving said insertion end in contact engagement therewith when said charge-air hose is inserted into said pipe stub in said axial direction to an axial position;

said insertion end having a cross section that is complementary in shape to a cross section of said contact region so as to cause said insertion end and said contact region to conjointly define a seal between said pipe stub and said charge-air hose at said axial position in response to said overpressure;

a latching device for fixing said charge-air hose in said pipe stub at said axial position of said charge-air hose relative to said pipe stub as said charge-air hose is inserted into said pipe stub in said axial direction;

said latching device including;

a holder mounted on said outer surface of said charge-air hose;

an annular spring disposed in said holder with said holder and said annular spring being insertable into said pipe stub as part of said charge-air hose;

said annular spring being resiliently biased in an outward radial direction;

said radial wall of said pipe stub having a slot formed therein for receiving said annular spring therein when said charge-air hose is inserted into said pipe stub causing said charge-air hose to latch with said pipe stub at said axial position; and

,

said insertion end having a cross section that is formed as a circular arc.