# US 10,480,398 B2 · Controlling turbocharger compressor choke

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- Number: US 10,480,398 B2
- Document ID: US10480398B2
- Status: Granted
- Kind: B2
- Application number: 15/023,096
- Filed: 2014-09-25
- Published: 2016-08-11
- Granted: 2019-11-19
- Earliest claimed: 2013-09-30
- Assignees: BorgWarner Inc.
- Applicants: BorgWarner Inc.
- Inventors: Gordon Jenks
- Web page: https://patentgrep.com/patent/US10480398B2

## CPC

- F02B 37/24: by using pumps or turbines with adjustable guide vanes
- F01D 17/146: {by throttling the volute inlet of radial machines or engines}
- F04D 29/422: {Discharge tongues (F04D17/04 takes precedence)}
- F04D 29/464: {adjusting flow cross-section, otherwise than by using adjustable stator blades}
- F05D 2250/52: Outlet
- Y02T 10/12: Improving ICE efficiencies
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- 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

A radial flow compressor includes a device (1, 34) for controlling air flow detachment from the volute tongue (3). The device (1, 34) may include a vane (1) or hole (34) in the tongue (3), and serves to redirect air over the volute tongue (3). The device (1, 34) aids in decreasing the velocity of air flow at the volute tongue (3), diminishes the vortices that develop at the volute tongue (3) from the high air velocities, and redirects air over the volute tongue (3) allowing the air to flow through the narrow passage and attach to the walls of the volute outlet (6).

## Claims

### Claim 1

A turbocharger comprising a radial compressor including a compressor wheel, a diffuser and a compressor volute (5), the compressor volute (5) having a compressor volute tongue (3) disposed therein, and a redirecting device in the form of a vane (1) in a volute outlet upstream of the compressor volute tongue (3) and configured to redirect air over a suction side of the compressor volute tongue (3).

### Claim 2 (depends on 1)

The turbocharger according to claim 1 wherein the vane (1) is fixed relative to the compressor volute (5).

### Claim 3 (depends on 1)

The turbocharger according to claim 1 wherein the vane (1) is a passive, free-floating vane.

### Claim 4 (depends on 1)

The turbocharger according to claim 1 wherein the vane (1) is movable relative to the compressor volute (5).

### Claim 5 (depends on 3)

The turbocharger according to claim 3 wherein the compressor volute (5, 15) includes a stop mechanism (14) that is configured to govern the movement of the vane (1, 11) relative to the compressor volute (5, 15).

### Claim 6 (depends on 4)

The turbocharger according to claim 4 wherein the position of the moveable vane (1) is controlled by an actuator.

### Claim 7

A turbocharger comprising a radial outflow compressor including
a compressor wheel,
a diffuser,
a compressor volute (5),
a compressor outlet (6),
a compressor tongue (3) between the compressor volute (5) and compressor outlet (6), the volute tongue (3) having a volute side and a compressor outlet side, and
a redirecting device (1, 34) in the compressor volute (5) for controlling choke at the outlet side of the volute tongue (3) by controlling air flow detachment from the volute tongue (3) by redirecting air flow onto the compressor outlet side of the compressor volute tongue (3).