Turbocharger

Abstract

A turbocharger for a motor vehicle has a housing and a valve seat in the housing. The valve seat is retained in an interlocking manner in the housing by at least one elastic securing element.

Claims

1. A turbocharger for a motor vehicle, comprising: a housing; a valve seat arranged in the housing; and at least one elastic securing element by which the valve seat is held in the housing in an interlocking connection.

2. The turbocharger according to claim 1, wherein the interlocking connection between the housing and the valve seat is configured via the elastic securing element so that the elastic securing element is tensioned before forming the interlocking connection of the valve seat and the housing and has the tension at least partly relaxed after forming the interlocking connection.

3. The turbocharger according to claim 2, wherein the elastic securing element protrudes into a material recess in the housing.

4. The turbocharger according to claim 3, wherein the material recess is ring shaped.

5. The turbocharger according to claim 2, wherein the elastic securing element protrudes into a material recess on the valve seat.

6. The turbocharger according to claim 5, wherein the material recess is ring shaped.

7. The turbocharger according to claim 2, wherein the elastic securing element is a snap ring.

8. The turbocharger according to claim 3, wherein the elastic securing element is a snap ring.

9. The turbocharger according to claim 5, wherein the elastic securing element is a snap ring.

10. The turbocharger according to claim 1, wherein the housing has an annular end stop against which an end face of the valve seat presses.

11. The turbocharger according to claim 1, further comprising: a bypass channel in the housing, wherein the valve seat is arranged in the bypass channel.

12. A method of manufacturing a turbocharger having a housing and a valve seat arranged in the housing, the method comprising the acts of: providing the valve seat with an elastic securing element, the elastic securing element being tensioned for connecting the valve seat and the housing; introducing the valve seat having the tensioned elastic securing element into the housing, wherein the elastic securing element at least partly relaxes the tension as soon as the valve seat reaches an end installation position in the housing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a cross-sectional representation of a turbocharger with a turbine housing and a valve seat.

[0019] FIG. 2 is an enlarged cross-sectional representation of a portion of the turbine housing and the valve seat.

[0020] FIG. 3 is a perspective view of the valve seat.

DETAILED DESCRIPTION OF THE DRAWINGS

[0021] Parts corresponding to each other are respectively given the same reference numbers in all the figures.

[0022] A subsequently described example of a turbocharger 2 sketched in FIG. 1 is part of an internal combustion engine of a motor vehicle, not further shown, and accordingly it is installed in a motor vehicle.

[0023] The turbocharger 2 includes a turbine housing 4, in which a turbine 6 is arranged. An exhaust gas stream from the internal combustion engine is flows across this turbine 6 during the operation of the turbocharger 2, so that the turbine 6 and thus ultimately the turbocharger 2 is driven.

[0024] In order to control the rotary speed of the turbine 6, the exhaust gas stream flowing across the turbine 6 is regulated by conducting a variably adjustable partial exhaust gas stream past the turbine 6 through a bypass channel 8. The partial exhaust gas stream flowing across the bypass channel 8 is regulated with the aid of a valve 10, which is designed as a valve flap and closes the bypass channel 8 in a servo position. Likewise in this servo position, the valve 10 lies against a valve seat 12, which is held as a separate component in the turbine housing 4 and designed as an annular sealing element.

[0025] The valve seat 12, designed in the manner of a seat ring, is secured with the aid of a snap ring 14, which lies in an encircling annular groove 16 on the valve seat 12 and protrudes into or engages with an annular detent groove 18 in the turbine housing 4. In the course of the installation, during which the prefabricated subassembly made up of valve seat 12 and snap ring 14 is inserted into the turbine housing 4, at first the snap ring 14 is tensioned by compression and the subassembly in this state is introduced into the bypass channel 8 of the turbine housing 4.

[0026] After this, the subassembly made up of valve seat 12 and snap ring 14 is pushed in the direction of an annular end stop 20, until it reaches its intended end position and presses by its end face against the end stop 20, by which the snap ring 14 expands into the detent groove 18 in the turbine housing 4 and becomes relaxed. In this way, the subassembly made up of valve seat 12 and snap ring 14 locks in the intended position and the valve seat 12 is thereafter held interlockingly in the turbine housing 4.

[0027] Once the valve seat 12 has been positioned in the turbine housing 4, the valve 10 is then introduced into the bypass channel 8 and pushed in the direction of the valve seat 12, until it rests by its end face against the valve seat 12 and closes the bypass channel 8. With the use of a servo mechanism, not further represented, the valve 10 can be shifted in the bypass channel 8 in the turbine housing 4 of the turbocharger 2, i.e., moved away from the valve seat 12, whereby a portion of the exhaust gas stream can be diverted past the turbine 6 through the bypass channel 8.

[0028] The invention is not limited to the above described sample embodiment. Instead, other variants of the invention can be derived from it by a person skilled in the art, without leaving the subject matter of the invention. In particular, moreover, all individual features described in connection with the sample embodiment can also be otherwise combined with each other, without leaving the subject matter of the invention.

LIST OF REFERENCE SYMBOLS

[0029] 2 turbocharger [0030] 4 turbine housing [0031] 6 turbine [0032] 8 bypass channel [0033] 10 valve [0034] 12 valve seat [0035] 14 snap ring [0036] 16 annular groove [0037] 18 detent groove [0038] 20 end stop

[0039] The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.