Throttle device

• US 20060048748A1
• Filed: 08/29/2005
• Published: 03/09/2006
• Est. Priority Date: 09/07/2004
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Knorpp, Michael, Utz, Udo, Kromer, Ralf
• Granted Patent: US 7,611,123 B2
• Time in Patent Office: Days
• US Class Current: 123/337
• CPC Class Codes: F02D 9/106 Sealing of the valve shaft in the housing, e.g. details of the bearings
• CPC Class Codes: F16K 1/221 specially adapted operating means therefor operating means per se F16K31/00

Abstract

A throttle device for controlling an internal combustion engine, in which the throttle valve is supported precisely employs a bearing recess serving to support the throttle valve shaft which is surrounded by a clamping element. As a result, there is excellent, durable stabilization of the bearing recess. The throttle device is especially well suited to vehicles that have a throttle-type internal combustion engine.

Claims

1. In a throttle device for an internal combustion engine, having a throttle valve housing (2) and having a throttle valve shaft (6) with a throttle valve (8), in which the throttle valve shaft (6) is pivotably supported in the throttle valve housing (2) in a bearing recess (10) provided on the throttle valve housing (2) and is pivotable with the aid of an adjusting device (18) that engages the throttle valve shaft, the improvement comprising a clamping element (30) surrounding the bearing recess (10) in the region of the bearing recess (10).

2. The throttle device as recited in claim 1, further comprising an extension (22) that receives the bearing recess (10), the extension (22) being integrally formed onto the throttle valve housing (2), the clamping element (30) surrounding the extension (22).

3. The throttle device as recited in claim 1, wherein the clamping element (30) is a sleeve.

4. The throttle device as recited in claim 2, wherein the clamping element (30) is a sleeve.

5. The throttle device as recited in claim 1, wherein the throttle valve housing (2), at least in the region of the bearing recess (10), is of plastic.

6. The throttle device as recited in claim 2, wherein the throttle valve housing (2), at least in the region of the bearing recess (10), is of plastic.

7. The throttle device as recited in claim 3, wherein the throttle valve housing (2), at least in the region of the bearing recess (10), is of plastic.

8. The throttle device as recited in claim 1, wherein the clamping element (30) is of metal.

9. The throttle device as recited in claim 3, wherein the clamping element (30) is of metal.

10. The throttle device as recited in claim 7, wherein the clamping element (30) is of metal.

11. The throttle device as recited in claim 1, further comprising a bearing (24) for supporting the throttle valve shaft (6) in the bearing recess (10).

12. The throttle device as recited in claim 2, further comprising a bearing (24) for supporting the throttle valve shaft (6) in the bearing recess (10).

13. The throttle device as recited in claim 3, further comprising a bearing (24) for supporting the throttle valve shaft (6) in the bearing recess (10).

14. The throttle device as recited in claim 11, wherein the outer circumference (24a) of the bearing (24) is built into the bearing recess (10) with radial tension.

15. The throttle device as recited in claim 2, wherein the outer circumference (24a) of the bearing (24) is built into the bearing recess (10) with radial tension.

16. The throttle device as recited in claim 5, wherein the outer circumference (24a) of the bearing (24) is built into the bearing recess (10) with radial tension.

17. The throttle device as recited in claim 11, wherein the bearing (24) is a roller bearing.

18. The throttle device as recited in claim 14, wherein the bearing (24) is a roller bearing.

19. The throttle device as recited in claim 14, wherein the bearing (24) is a slide bearing.

20. The throttle device as recited in claim 1, wherein the clamping element (30) has a coefficient of thermal expansion which is substantially of the same magnitude as a coefficient of thermal expansion of the bearing (24).