# US 9,518,591 B2 · Compressor of an exhaust-gas turbocharger

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- Number: US 9,518,591 B2
- Document ID: US9518591B2
- Status: Granted
- Kind: B2
- Application number: 13/127,807
- Filed: 2009-11-09
- Published: 2011-09-08
- Granted: 2016-12-13
- Earliest claimed: 2008-11-18
- Assignees: BorgWarner Inc.
- Applicants: Frank Schmitt; Tom Heuer
- Inventors: Frank Schmitt; Tom Heuer
- Web page: https://patentgrep.com/patent/US9518591B2

## CPC

- F04D 29/4213: {suction ports}
- F02B 39/00: Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02M 26/09: Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
- F04D 27/0238: {Details or means for fluid reinjection}
- F04D 29/685: {Inducing localised fluid recirculation in the stator-rotor interface}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

## Abstract

A compressor of an exhaust-gas turbocharger has a compressor housing in which a compressor wheel is arranged. The compressor housing has an inlet region. A contour ring is arranged in the compressor housing between the inlet region and the compressor wheel. The contour ring, together with an adjacent wall of the compressor housing, delimits a circulation chamber which has a first connecting opening facing toward the inlet region and a second connecting opening adjacent to the compressor wheel. An exhaust-gas recirculation device has an inlet line which is arranged in the compressor housing and which opens out into the circulation chamber.

## Claims

### Claim 1

A compressor (1) of an exhaust-gas turbocharger (ATL) comprising:
a compressor housing (2) having a longitudinal axis (L) in which a compressor wheel (3) is arranged, the compressor housing having an inlet (4),
a contour ring (5) which is arranged in the compressor housing (2) between the inlet (4) and the compressor wheel (3), and which, together with an adjacent circumferential wall (7) of the compressor housing (2), delimits a circulation chamber (6) which has a first circulation chamber connecting opening (8) facing toward the inlet (4) and a second circulation chamber connecting opening (9) adjacent to the compressor wheel (3), the first circulation chamber connecting opening (8) and the second circulation chamber connecting opening (9) permitting fluid communication with the circulation chamber, each of the first circulation chamber connecting opening and the second circulation chamber connecting opening being defined by a portion of the contour ring and a portion of the compressor housing, and
an exhaust-gas recirculation inlet line (10) defined by the compressor housing (2), an axis (A) being disposed along a length of the exhaust-gas recirculation inlet line (10), the exhaust-gas recirculation inlet line (10) having first and second ends, wherein the second end of the exhaust-gas recirculation inlet line (10) has an opening (18) which opens out into the circulation chamber (6) at the first circulation chamber connecting opening (8), and
wherein the axis (A) of the exhaust-gas recirculation inlet line (10) is at a first angle (α) that has an inclined non-perpendicular relationship to the longitudinal axis (L) of the compressor housing (2) and a second angle (β) that has a tangentially inclined, non-perpendicular relationship to the compressor housing (2) that at least partially delimits the circulation chamber (6), the second angle further being relative to a cross-section circumferential direction of the compressor housing (2), and the inclination of the first angle (α) along with the tangential inclination of the second angle (β) of the exhaust-gas recirculation line (10), in combination, cooperate to produce a swirl generation of fluid in the circulation chamber (6) that results from fluid being received from the exhaust-gas recirculation inlet line (10) during operation of the compressor (1) of the exhaust-gas turbocharger (ATL).

### Claim 2 (depends on 1)

The compressor as claimed in claim 1, wherein a ring (13) is arranged, spaced apart from and upstream of the first circulation chamber connecting opening (8) relative to a direction of fluid flow from the inlet to the compressor wheel (3), in the compressor housing (2).