# US 9,518,476 B2 · Exhaust-gas turbocharger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,518,476 B2 - Document ID: US9518476B2 - Status: Granted - Kind: B2 - Application number: 14/396,104 - Filed: 2013-04-19 - Published: 2015-04-30 - Granted: 2016-12-13 - Earliest claimed: 2012-04-27 - Assignees: BorgWarner Inc. - Applicants: BorgWarner Inc. - Inventors: Dietmar Metz; Martin Mueller; Thomas Ramb - Web page: https://patentgrep.com/patent/US9518476B2 ## CPC - F01D 17/167: {of vanes moving in translation} - F02B 37/24: by using pumps or turbines with adjustable guide vanes - F05D 2220/40: in turbochargers - Y02T 10/12: Improving ICE efficiencies - 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) having a turbine (2), with a turbine wheel (3) surrounded by an intake duct (4), and a VTG cartridge (5), with a washer (6) and a vane bearing ring (7), which delimit the intake duct (4), and with a plurality of vanes (8), arranged in the intake duct (4) and mounted in the vane bearing ring (7) by way of rotatable vane shafts (9), which are connected to vane levers (10), the lever heads (11) of which engage into associated grooves (12) in a unison ring (13), which surrounds the vane bearing ring (7); and having a radial bearing between the unison ring (13) and the vane bearing ring (7). The vane levers (10) for forming the radial bearing are in the form of cam levers, the lever heads (11) of which are supported in the grooves (12). ## Claims ### Claim 1 An exhaust-gas turbocharger (1) having a turbine (2), which has a turbine wheel (3) surrounded by an intake duct (4), a VTG cartridge (5), which has a washer (6) and a vane bearing ring (7), which delimit the intake duct (4), and a plurality of vanes (8), which are arranged in the intake duct (4) and are mounted in the vane bearing ring (7) by way of rotatable vane shafts (9), which are connected to vane levers (10), the lever heads (11) of which engage into associated grooves (12) in a unison ring (13), which surrounds the vane bearing ring (7) on the outside; and a radial bearing between the unison ring (13) and the vane bearing ring (7), wherein the vane levers (10) for forming the radial bearing are in the form of cam levers, the lever heads (11) of which are supported in the grooves (12). ### Claim 2 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the lever heads (11) each have a rounded end face (14), which is in rolling contact (KW) with a counterface (15) of the grooves (12). ### Claim 3 (depends on 2) The exhaust-gas turbocharger as claimed in claim 2, wherein the counterface (15) has a planar form. ### Claim 4 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the lever heads (11) have side walls (16, 17), which are in lateral contact (KS1, KS2) with associated side walls (18, 19) of the grooves (12) adjoining the counterface (15). ### Claim 5 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the lever heads (11) have lateral rolling bearing support points (KW1, KW2), which are supported on associated outer edge regions (20, 21) of the grooves (12). ### Claim 6 (depends on 5) The exhaust-gas turbocharger as claimed in claim 5, wherein the lever heads (11) each have a central recess (23), into which an associated lug (22) of the unison ring (13) engages. ### Claim 7 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the vane levers (10) are in the form of cranked levers. ### Claim 8 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the vane levers (10) are stamped or formed parts. ### Claim 9 (depends on 1) The exhaust-gas turbocharger as claimed in claim 1, wherein the unison ring (13) is axially mounted by way of the vane bearing ring (7). ### Claim 10 (depends on 9) The exhaust-gas turbocharger as claimed in claim 9, wherein the vane bearing ring (7) has bearing segments (24), which rest on the unison ring (13). ### Claim 11 A VTG cartridge (5) of an exhaust-gas turbocharger (1), having a washer (6) and having a vane bearing ring (7), which delimit an intake duct (4), a plurality of vanes (8), which are arranged in the intake duct (4) and are mounted in the vane bearing ring (7) by way of rotatable vane shafts (9), which are connected to vane levers (10), the lever heads (11) of which engage into associated grooves (12) in a unison ring (13), which surrounds the vane bearing ring (7) on the outside, and a radial bearing between the unison ring (13) and the vane bearing ring (7), wherein the vane levers (10) for forming the radial bearing are in the form of cam levers, the lever heads (11) of which are supported in the grooves (12). ### Claim 12 (depends on 11) The VTG cartridge as claimed in claim 11, wherein the lever heads (11) each have a rounded end face (14), which is in rolling contact (KW) with a counterface (15) of the grooves (12). ### Claim 13 (depends on 12) The VTG cartridge as claimed in claim 12, wherein the counterface (15) has a planar form. ### Claim 14 (depends on 11) The VTG cartridge as claimed in claim 11, wherein the lever heads (11) have side walls (16, 17), which are in lateral contact (KS1, KS2) with associated side walls (18, 19) of the grooves (12) adjoining the counterface (15). ### Claim 15 (depends on 11) The VTG cartridge as claimed in claim 11, wherein the lever heads (11) have lateral rolling bearing support points (KW1, KW2), which are supported on associated outer edge regions (20, 21) of the grooves (12). ### Claim 16 (depends on 15) The VTG cartridge as claimed in claim 15, wherein the lever heads (11) each have a central recess (23), into which an associated lug (22) of the unison ring (13) engages. ### Claim 17 (depends on 11) The VTG cartridge as claimed in claim 11, wherein the vane levers (10) are in the form of cranked levers. ### Claim 18 (depends on 11) The VTG cartridge as claimed in claim 11, wherein the vane levers (10) are stamped or formed parts. ### Claim 19 (depends on 11) The VTG cartridge as claimed in claim 11, wherein the unison ring (13) is axially mounted by way of the vane bearing ring (7). ### Claim 20 (depends on 19) The VTG cartridge as claimed in claim 19, wherein the vane bearing ring (7) has bearing segments (24), which rest on the unison ring (13).