# US 2003/0115872 A1 · Compressor in a turbocharger

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- Number: US 2003/0115872 A1
- Document ID: US20030115872A1
- Status: Published application
- Kind: A1
- Application number: 10/176,889
- Filed: 2002-06-21
- Published: 2003-06-26
- Earliest claimed: 2001-06-23
- Assignees: DaimlerChrysler AG
- Inventors: Siegfried Sumser; Peter Fledersbacher; Helmut Finger; Helmut Daudel; Gebhard Bopp
- Web page: https://patentgrep.com/patent/US20030115872A1

## CPC

- F02B 33/44: Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
- F01D 9/06: Fluid supply conduits to nozzles or the like
- F02B 37/00: Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F04D 25/04: the pump being fluid-driven {(pumps driven by exhaust gases F02B37/00, F02B39/00; turbochargers F02C6/12)}
- F05D 2220/40: in turbochargers
- F05D 2250/231: cylindrical
- F05D 2250/311: the axes being in line
- F05D 2250/314: the axes being inclined in relation to each other
- 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 compressor in a turbocharger has a compressor impeller in an inflow passage and an outflow region downstream of the compressor-impeller outlet edge. The outflow region is assigned a connecting passage, a stabilizing chamber and an outflow passage, the connecting passage being arranged with a lateral offset with respect to a longitudinal center axis of the stabilizing chamber.

## Claims

### Claim 1

A compressor in a turbocharger, comprising:
a compressor inflow passage;
a compressor impeller arranged in the compressor inflow passage;
a compressor outflow region arranged downstream of a compressor-impeller outlet edge, the compressor outflow region including:
a connecting passage;
a stabilizing chamber having a cross-section that is wider than a cross-section of the connecting passage;
an outflow passage connected to the stabilizing chamber configured to discharge compressed medium from the compressor;
wherein the connecting passage is configured to open out into the stabilizing chamber with a lateral offset with respect to a longitudinal center axis of the stabilizing chamber, the outflow passage and the connecting passage including an angle.

### Claim 2 (depends on 1)

The compressor according to claim 1, wherein the stabilizing chamber includes a cylindrical structure, the longitudinal center axis of the stabilizing chamber extending orthogonally with respect to a longitudinal axis of the connecting passage.

### Claim 3 (depends on 1)

The compressor according to claim 1, wherein the connecting passage includes a wall that extends tangentially with respect to a wall of the stabilizing chamber.

### Claim 4 (depends on 1)

The compressor according to claim 1, wherein the stabilizing chamber and the outflow passage are arranged coaxially.

### Claim 5 (depends on 1)

The compressor according to claim 1, wherein the outflow passage has a smaller cross-section than the stabilizing chamber.

### Claim 6 (depends on 1)

The compressor according to claim 1, wherein the outflow passage is configured as a diffuser and has a cross-section that widens in a direction of flow.

### Claim 7 (depends on 6)

The compressor according to claim 6, wherein the outflow passage has a widening angle of less than 5°.

### Claim 8 (depends on 1)

The compressor according to claim 1, wherein a ratio of the lateral offset between the connecting passage and stabilizing chamber to a cross-section of flow of the connecting passage exceeds a predetermined limit value.

### Claim 9 (depends on 1)

The compressor according to claim 1, wherein a ratio of a volume of the stabilizing chamber to a cross-section of flow of the connecting passage exceeds a predetermined limit value.

### Claim 10 (depends on 1)

The compressor according to claim 1, wherein the turbocharger includes an exhaust-gas turbocharger for an internal combustion engine.