# US 7,611,123 B2 · Throttle device

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- Number: US 7,611,123 B2
- Document ID: US7611123B2
- Status: Granted
- Kind: B2
- Application number: 11/212,589
- Filed: 2005-08-29
- Published: 2006-03-09
- Granted: 2009-11-03
- Earliest claimed: 2004-09-07
- Assignees: Robert Bosch GmbH
- Inventors: Udo Utz; Ralf Kromer; Michael Knorpp
- Web page: https://patentgrep.com/patent/US7611123B2

## CPC

- F02D 9/106: {Sealing of the valve shaft in the housing, e.g. details of the bearings}
- F16K 1/221: {specially adapted operating means therefor (operating means per se F16K31/00)}
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}

## 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

### Claim 1

In a throttle device for an internal combustion engine, having a throttle valve housing (2) which includes an extension (22) which has a bearing recess (10), and having a throttle valve shaft (6) with a throttle valve (8), in which the throttle valve shaft (6) is pivotably supported in the bearing recess (10) 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 extension (22) in the region of the bearing recess (10), and wherein
(a) the throttle valve shaft (6) is supported in the bearing recess (10) via a bearing (24);
(b) the bearing (24) having an outer circumference (24a) such that it fits within the bearing recess (10) with a radial tension against the inside of the bearing recess (10); and
(c) the damning element (30) having an internal diameter such that it presses from the outside inwardly against the extension (22).

### Claim 2 (depends on 1)

The throttle device as recited in claim 1, wherein the extension (22) is integrally formed onto the throttle valve housing (2).

### Claim 3 (depends on 2)

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

### Claim 4 (depends on 2)

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.

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 5)

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

### Claim 7 (depends on 6)

The throttle device as recited in claim 6, wherein the clamping element (30) is of metal.

### Claim 8 (depends on 5)

The throttle device as recited in claim 5, wherein the clamping element (30) is of metal.

### Claim 9 (depends on 1)

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.

### Claim 10 (depends on 1)

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

### Claim 11 (depends on 1)

The throttle device as recited in claim 1, wherein the bearing (24) is a roller bearing.

### Claim 12 (depends on 1)

The throttle device as recited in claim 1, wherein the bearing (24) is a roller bearing.

### Claim 13 (depends on 1)

The throttle device as recited in claim 1, wherein the bearing (24) is a slide bearing.

### Claim 14 (depends on 1)

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).