# US 10,119,549 B2 · Exhaust-gas turbocharger

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- Number: US 10,119,549 B2
- Document ID: US10119549B2
- Status: Granted
- Kind: B2
- Application number: 14/406,324
- Filed: 2013-06-14
- Published: 2015-05-07
- Granted: 2018-11-06
- Earliest claimed: 2012-06-21
- Assignees: BorgWarner Inc.
- Applicants: BorgWarner Inc.
- Inventors: Juergen Tschirschke
- Web page: https://patentgrep.com/patent/US10119549B2

## CPC

- F04D 27/009: {by bleeding, by passing or recycling fluid}
- F01D 17/105: {by passing part of the fluid}
- F01D 17/20: Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted (sensing elements alone F01D17/02; final actuators alone F01D17/10)
- F01D 25/24: Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045})
- F02B 37/183: {Arrangements of bypass valves or actuators therefor}
- F02B 37/186: {Arrangements of actuators or linkage for bypass valves}
- F04D 17/10: for compressing or evacuating
- F04D 29/403: {especially adapted for elastic fluid pumps}
- F05D 2220/40: in turbochargers
- Y02T 10/12: Improving ICE efficiencies
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An exhaust-gas turbocharger (1) with a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct (19) between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (10) having a pivotable flap plate for opening and closing the wastegate duct (19), wherein the flap plate is in the form of an elastic spring disk (11).

## Claims

### Claim 1

An exhaust-gas turbocharger (1) comprising:
a turbine housing (2)
which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and
which has a wastegate duct (19) between the turbine housing inlet (8) and the turbine housing outlet (9), and
a flap arrangement (10) having a pivotable flap plate for opening and closing the wastegate duct (19),
wherein
the flap plate is an elastic spring disk (11),
the flap arrangement (10) comprises a flap shaft (13) rotatably mounted in the turbine housing (2) and comprises a lever (12), wherein the lever (12) connects the spring disk (11) to the flap shaft (13) in a rotationally conjoint manner, and
the spring disk (11) comprises a recess, and the lever (12) is connected to the spring disk (11) by means of a pin (16) which projects through the recess.

### Claim 2 (depends on 1)

The exhaust-gas turbocharger as claimed in claim 1, wherein the spring disk (11) is arranged so as to make direct sealing contact with the turbine housing (2) when the flap arrangement (10) is in the closed state.

### Claim 3 (depends on 1)

The exhaust-gas turbocharger as claimed in claim 1, wherein the flap shaft (13) is manufactured in one piece with the lever (12), or wherein the flap shaft (13) is welded to the lever (12).

### Claim 4 (depends on 1)

The exhaust-gas turbocharger as claimed in claim 1, wherein the spring disk (11) bears directly against the lever (12).

### Claim 5 (depends on 1)

The exhaust-gas turbocharger as claimed in claim 1, wherein an annular, outer portion of the spring disk (11) is formed as a sealing surface.

### Claim 6 (depends on 5)

The exhaust-gas turbocharger as claimed in claim 5, wherein the sealing surface is a bead (18).

### Claim 7 (depends on 5)

The exhaust-gas turbocharger as claimed in claim 5, wherein the sealing surface is bent forward toward the wastegate duct (19).

### Claim 8 (depends on 1)

The exhaust-gas turbocharger as claimed in claim 1, wherein the spring disk (11) is manufactured from spring steel.