# US 12,180,883 B2 · Control device of an exhaust gas-conducting section of an exhaust gas turbocharger

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- Number: US 12,180,883 B2
- Document ID: US12180883B2
- Status: Granted
- Kind: B2
- Application number: 18/287,480
- Filed: 2022-06-08
- Published: 2024-11-21
- Granted: 2024-12-31
- Earliest claimed: 2021-07-01
- Assignees: IHI Charging Systems International GmbH; Mercedes-Benz Group AG
- Applicants: IHI Charging Systems International GmbH; Mercedes-Benz Group AG
- Inventors: Manfred Guthörle; Viktor Dick; Stephan Weniger; Zdenek Reif; Nils Brinkert; Jürgen Weeber; Thomas Knieps
- Web page: https://patentgrep.com/patent/US12180883B2

## CPC

- F02B 37/18: by bypassing exhaust {from the inlet to the outlet of turbine or to the atmosphere}
- F02B 37/183: {Arrangements of bypass valves or actuators therefor}
- F02B 37/025: {Multiple scrolls or multiple gas passages guiding the gas to the pump drive}
- F16K 1/2014: {Shaping of the valve member}
- 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)
- 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)}
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A control device of an exhaust gas-conducting section of a turbocharger includes a pivotable closing device with a closing element and an element lever. A first element portion thereof opens and closes a first flow cross-section of a flow connection and a second element portion opens and closes a second flow cross-section of a bypass duct of the exhaust gas-conducting section. The element lever includes a lever end portion engaging into a cavity of the closing element. A holding element is fixedly connected to the closing element. The lever end portion includes a first contact surface and, axially spaced apart, a second contact surface. The first contact surface includes an axially-extending first partial surface and a radially-extending second partial surface connected to one another by a third partial surface. The partial surfaces are designed to be able to effect contact with the closing element.

## Claims

### Claim 1

A control device of an exhaust gas-conducting section of an exhaust gas turbocharger, comprising:
a closing device (9) comprising
a closing element (10) and
an element lever (11),
wherein the closing device (9) is configured to pivot about an axis of rotation (19), and
wherein the closing element (10) is configured to open and close a first flow cross-section (13) of the exhaust gas-conducting section (1),
wherein the first flow cross-section (13) is formed in a partition wall lying between a first spiral channel (4) of the exhaust gas-conducting section (1) and a second spiral channel (5) of the exhaust gas-conducting section (1), and
wherein the exhaust gas-conducting section (1) comprises a second flow cross-section (17) of a bypass duct (18) formed in the exhaust gas-conducting section (1), the bypass duct is configured to bypass a flow against a turbine wheel formed in the exhaust gas-conducting section (1), and
wherein the closing element (10) comprises
a first element portion (15) configured to close the first flow cross-section (13) and
a second element portion (16) configured to close the second flow cross-section (17), and
wherein the element lever (11) comprises a lever end portion (23) engaging into a cavity (20) of the closing element (10), and
wherein the closing element (10) comprises a holding element (21) fixedly connected thereto and encompassed by the lever end portion (23), and
wherein the lever end portion (23) comprises
a first contact surface (26) and
a second contact surface (27) axially spaced apart from the first contact surface (26) with respect to a longitudinal axis (22) of the closing element (10),
wherein the first contact surface (26) comprises an axially-extending first partial surface (30) and a radially-extending second partial surface (31),
wherein the axially-extending first partial surface (30) and the radially-extending second partial surface (31) are connected to one another by a third partial surface (32) formed between the axially-extending first partial surface (30) and the radially-extending second partial surface (31),
wherein each of the partial surfaces (30, 31, 32) is configured to contact the closing element (10), and
wherein each of the partial surfaces (30, 31, 32) and a base (29) of the closing element (10) are planar, and
wherein the three partial surfaces (30, 31, 32) are formed contiguously and opposite an inner wall (28) and the base (29), and
wherein the lever end portion (23) further comprises
a first partial portion (33), comprising the first partial surface (30), and
a second partial portion (34) comprising the second partial surface (31) and the third partial surface (32),
wherein the second partial portion (34) is frustoconical.

### Claim 2 (depends on 1)

The control device as claimed in claim 1, wherein the first partial surface (30) and the third partial surface (32) are annular.

### Claim 3 (depends on 1)

The control device as claimed in claim 1, wherein the third partial surface (32) is inclined with respect to the longitudinal axis (22).

### Claim 4 (depends on 3)

The control device as claimed in claim 3, wherein a first distance (A1) of the third partial surface (32) from the longitudinal axis (22), is smaller than a second distance (A2) of the third partial surface (32) from the longitudinal axis (22).

### Claim 5 (depends on 1)

The control device as claimed in claim 1, wherein the second contact surface (27) is spaced apart from the longitudinal axis (22) unequally to the first contact surface (26).

### Claim 6 (depends on 1)

The control device as claimed in claim 1, wherein the inner wall (28) defines the cavity (20) and comprises at least one step (37).

### Claim 7 (depends on 1)

The control device as claimed in claim 1, wherein between the closing element (10) and the lever end portion (23) during maximum tilting of the closing element (10) relative to the lever end portion (23), the first contact surface (26) comprises at least one first contact point (38) and one second contact point (39), and
wherein the at least one first contact point (38) and the at least one second contact point (39) are spaced apart from each other axially and radially with respect to the longitudinal axis (22).

### Claim 8 (depends on 1)

The control device as claimed in claim 1, wherein, between the closing element (10) and the lever end portion (23) during maximum tilting of the closing element (10) relative to the lever end portion (23), the second contact surface (27) comprises at least one third contact point (40).

### Claim 9 (depends on 1)

The control device as claimed in claim 1, wherein an element ring (35) of the lever end portion (23) is formed on an annular surface (41), and
wherein the annular surface is transverse to the second contact surface (27), so as to provide a fourth contact point (42).

### Claim 10 (depends on 1)

The control device as claimed in claim 1, wherein the holding element (21) comprises a securing element (43) disposed on an element end (46) remote from the base (29) of the closing element (10).

### Claim 11 (depends on 1)

The control device as claimed in claim 1, wherein a lever arm (44) of the element lever (11), receiving the lever end portion (23), is curved at an end (45) facing the lever end portion (23).