# US 10,502,125 B2 · Turbine wastegate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,125 B2 - Document ID: US10502125B2 - Status: Granted - Kind: B2 - Application number: 16/018,794 - Filed: 2018-06-26 - Published: 2018-10-18 - Granted: 2019-12-10 - Earliest claimed: 2012-09-13 - Assignees: Garrett Transportation I Inc. - Applicants: Garrett Transportation I Inc. - Inventors: Manimurugan Palaniyappan; Martin Benda; Jan Jurasek; Manuel Marques - Web page: https://patentgrep.com/patent/US10502125B2 ## CPC - F02B 37/186: {Arrangements of actuators or linkage for bypass valves} - F01D 17/08: responsive to condition of working-fluid, e.g. pressure - F01D 17/105: {by passing part of the fluid} - F02B 37/183: {Arrangements of bypass valves or actuators therefor} - F16K 1/2014: {Shaping of the valve member} - F02M 26/05: High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor - 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) - 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)} - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A turbocharger wastegate assembly includes a turbine housing that includes a chamber, a bore, two exhaust passages, a divider wall disposed between the two exhaust passages, and a wastegate seat, where the divider wall includes a divider wall surface; and a wastegate that includes a shaft, an arm and a plug, where the shaft is received by the bore of the turbine housing for rotation about an axis of the shaft to orient the plug in a closed state and to orient the plug in an open state, where, in the closed state, a contact portion of the plug contacts the wastegate seat and a shell portion of the plug defines a clearance with respect to the divider wall surface and extends into the two exhaust passages. ## Claims ### Claim 1 A turbocharger wastegate assembly comprising: a turbine housing that comprises a chamber, a bore, two exhaust passages, a divider wall disposed between the two exhaust passages, and a wastegate seat, wherein the divider wall comprises a divider wall surface; and a wastegate that comprises a shaft, an arm and a plug, wherein the shaft is received by the bore of the turbine housing for rotation about an axis of the shaft to orient the plug in a closed state and to orient the plug in an open state, wherein, in the closed state, a contact portion of the plug contacts the wastegate seat and a shell portion of the plug defines a clearance with respect to the divider wall surface and extends into the two exhaust passages. ### Claim 2 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the contact portion defines a plane, wherein the plug comprises a plug axis perpendicular to the plane, and wherein the shell portion extends a distance along the plug axis axially away from the plane. ### Claim 3 (depends on 2) The turbocharger wastegate assembly of claim 2 wherein, in the closed state, the shell portion defines the clearance with respect to the divider wall surface along the plug axis. ### Claim 4 (depends on 3) The turbocharger wastegate assembly of claim 3 wherein the shell portion comprises a substantially planar surface at a position along the plug axis, wherein the divider wall surface comprises a substantially planar surface, and wherein, in the closed state, the clearance is defined between the substantially planar surface of the shell portion and the substantially planar surface of the divider wall surface. ### Claim 5 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein, in the closed state, a corner portion of the shell portion is disposed in one of the two exhaust passages and another corner portion of the shell portion is disposed in the other of the two exhaust passages. ### Claim 6 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the contact portion is part of a rim of the plug wherein the shell portion extends away from the rim. ### Claim 7 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the wastegate seat comprises a conical profile. ### Claim 8 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the contact portion of the plug comprises a profile that is a portion of a torus. ### Claim 9 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the two exhaust passages are in fluid communication with different exhaust passages of an exhaust manifold. ### Claim 10 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the turbine housing comprises two volutes. ### Claim 11 (depends on 10) The turbocharger wastegate assembly of claim 10 wherein each of the two volutes is in fluid communication with a respective one of the two exhaust passages. ### Claim 12 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein, in the closed state, the shell portion does not contact the turbine housing. ### Claim 13 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein, in the closed state, the shell portion does not contact the wastegate seat. ### Claim 14 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein, in the closed state, the clearance resists flow of exhaust from one of the two passages to the other of the two passages. ### Claim 15 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein, in the closed state, the clearance is less than a thickness of the shell portion of the plug. ### Claim 16 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the shell portion comprises halves wherein, in the closed state, one of the halves extends into one of the two exhaust passages and the other of the halves extends into the other of the two exhaust passages. ### Claim 17 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the wastegate is a monoblock wastegate. ### Claim 18 (depends on 1) The turbocharger wastegate assembly of claim 1 wherein the shaft, the arm and the plug are a unitary piece of material.