# US 12,760,657 B2 · Nozzle for partitioned volute > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,760,657 B2 - Document ID: US12760657B2 - Status: Granted - Kind: B2 - Application number: 19/104,222 - Filed: 2023-08-18 - Published: 2026-02-26 - Granted: 2026-10-13 - Earliest claimed: 2022-08-20 - Assignees: Garrett Transportation I Inc. - Applicants: Garrett Transportation I Inc. - Inventors: Petr Skara; Juraj Pospisil; Pavel Foucek; Martin Babak; Michal Planka; Martin Sevcik; Michele Cardone; Aurelien Tingaud; Ondrej Senekl - Web page: https://patentgrep.com/patent/US12760657B2 ## CPC - F01D 17/16: by means of nozzle vanes - F01D 25/24: Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045}) - F02B 37/22: by varying cross-section of exhaust passages or air passages {, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits} (F02B37/24 takes precedence) - F05D 2220/40: in turbochargers - 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 ## Abstract The disclosed assembly includes an exhaust gas turbine housing having inner and outer walls defining first and second exhaust gas channels to a turbine wheel space where an inner wall includes an inner wall end and an outer wall includes an outer wall end, both at the turbine wheel space. A first flow body is disposed adjacent to the inner wall end. A second flow body is disposed adjacent to the outer wall end. At least one set of adjustable variable geometry nozzle vanes define nozzle throats that direct flow of exhaust gas from at least one of the exhaust gas channels to the turbine wheel space At least one of the first flow body and the second flow body includes a concave trailing surface defined in part by an extension of an airfoil surface. ## Claims ### Claim 1 An assembly comprising: an exhaust gas turbine housing comprising an inner wall and an outer wall that define a first exhaust gas channel and a second exhaust gas channel to a turbine wheel space, wherein the inner wall comprises an inner wall end at the turbine wheel space and the outer wall comprises an outer wall end at the turbine wheel space; a first flow body arranged adjacent to the inner wall end; a second flow body arranged adjacent to the outer wall end; and at least one set of adjustable variable geometry nozzle vanes that define nozzle throats that direct flow of exhaust gas from at least one of the exhaust gas channels to the turbine wheel space; wherein at least one of the first flow body and the second flow body comprises a concave trailing surface that is defined in part by an extension of an airfoil surface; wherein the first flow body comprises a leading surface, the concave trailing surface, and a first airfoil surface and a second airfoil surface that extend between the leading surface and the concave trailing surface; wherein one of the first airfoil surface and the second airfoil surface is formed in part by the extension; and wherein the one of the first airfoil surface and the second airfoil surface comprises a varying height, and wherein the varying height comprises a lesser height at the extension. ### Claim 2 (depends on 1) The assembly of claim 1, wherein the first flow body and the second flow body are fixed. ### Claim 3 (depends on 1) The assembly of claim 1, wherein the inner wall end forms a first tongue and wherein the first flow body is adjacent to the first tongue. ### Claim 4 (depends on 1) The assembly of claim 1, wherein the outer wall end forms a second tongue and wherein the second flow body is adjacent to the second tongue. ### Claim 5 (depends on 1) The assembly of claim 1, wherein the extension defines a pocket that receives a leading edge of one of the adjustable variable geometry nozzle vanes. ### Claim 6 (depends on 1) The assembly of claim 1, wherein the extension limits rotation of one of the adjustable variable geometry nozzle vanes in one of two rotational directions. ### Claim 7 (depends on 1) The assembly of claim 1, wherein at least one of the first flow body and the second flow body comprises a spacer. ### Claim 8 (depends on 7) The assembly of claim 7, wherein the spacer is disposed at a leading surface of the at least one of the first flow body and the second flow body. ### Claim 9 (depends on 7) The assembly of claim 7, wherein the spacer is disposed at a leading surface of the at least one of the first flow body and the second flow body and does not extend to a post of the at least one of the first flow body and the second flow body. ### Claim 10 (depends on 1) The assembly of claim 1, wherein the extension comprises a height approximately equal to a vane height. ### Claim 11 (depends on 10) The assembly of claim 10, wherein a maximum flow body height exceeds a vane height. ### Claim 12 (depends on 1) The assembly of claim 1, wherein the first exhaust gas channel and the second exhaust gas channel comprise different A/R values.