# US 2019/0170091 A1 · Exhaust-gas switch for a vehicle

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- Number: US 2019/0170091 A1
- Document ID: US20190170091A1
- Status: Published application
- Kind: A1
- Application number: 16/200,243
- Filed: 2018-11-26
- Published: 2019-06-06
- Earliest claimed: 2017-12-01
- Assignees: BorgWarner Ludwigsburg GmbH
- Applicants: BorgWarner Ludwigsburg GmbH
- Inventors: Till Neumann; Markus Baumann; Markus Wagner; Bernd Bareis
- Web page: https://patentgrep.com/patent/US20190170091A1

## CPC

- F02M 26/70: Flap valves; Rotary valves; Sliding valves; Resilient valves
- F02M 26/71: Multi-way valves
- F16K 11/052: with pivoted closure members, e.g. butterfly valves
- F16K 11/0525: {the closure members being pivoted around an essentially central axis}
- F16K 27/0209: {Check valves or pivoted valves}
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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

Described is an exhaust-gas switch, in particular for trucks, having a housing that has an inlet, a first outlet and a second outlet, having a shaft led out from the housing, and having a valve flap arranged in the housing that is pivotable about a geometric pivot axis by means of the shaft between a first position and a second position, the valve flap having a blocking portion that in the first position blocks the first outlet and in the second position blocks the second outlet. According to this disclosure, provision is made such that the valve flap bears a counterweight to the blocking portion, the geometric pivot axis being arranged between the blocking portion and the counterweight.

## Claims

### Claim 1

An exhaust-gas switch, comprising:
a housing having an inlet, a first outlet and a second outlet;
a shaft extending from the housing; and
a valve flap arranged in the housing and being pivotable about a geometric pivot axis between a first position and a second position via the shaft;
wherein the valve flap defines a blocking portion that in the first position blocks the first outlet and in the second position blocks the second outlet; and
wherein the valve flap bears a counterweight to the blocking portion, the geometric pivot axis being arranged between the blocking portion and the counterweight.

### Claim 2 (depends on 1)

The exhaust-gas switch according to claim 1, wherein the valve flap comprises two superimposed sheet metal discs, between which a portion of the shaft is held.

### Claim 3 (depends on 2)

The exhaust-gas switch according to claim 2, wherein the counterweight is arranged between the two sheet metal discs.

### Claim 4 (depends on 2)

The exhaust-gas switch according to claim 2, wherein the two sheet metal discs have cut-outs, each of the cut-outs of one of the two sheet metal discs being covered by the respective other sheet metal disc.

### Claim 5 (depends on 2)

The exhaust-gas switch according to claim 2, wherein the sheet metal discs are stiffened in the blocking portion by corrugations.

### Claim 6 (depends on 3)

The exhaust-gas switch according to claim 3, wherein at least one of the corrugations is configured as a recess in which the cut-out is arranged.

### Claim 7 (depends on 5)

The exhaust-gas switch according to claim 5, wherein the depth of the corrugations decreases as the distance from the geometric pivot axis increases.

### Claim 8 (depends on 2)

The exhaust-gas switch according to claim 2, wherein the sheet metal discs are of identical construction.

### Claim 9 (depends on 1)

The exhaust-gas switch according to claim 1, wherein the counterweight is arranged in a side room of the housing, which side room is arranged next to a flow channel defined by the housing.

### Claim 10 (depends on 1)

The exhaust-gas switch according to claim 1, wherein the counterweight is a pin arranged parallel to the geometric pivot axis.

### Claim 11 (depends on 1)

The exhaust-gas switch according to claim 1, wherein the valve tapers in a wedge-shape on the side of the geometric pivot axis facing away from the counterweight.

### Claim 12 (depends on 1)

The exhaust-gas switch according to claim 1, wherein during the pivot movement effected by the valve, the counterweight has a moment of inertia that is at least 15% of the moment of inertia of the blocking portion.