# US 2014/0150424 A1 · Turbocharger wastegate and method for operation of a turbocharger wastegate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150424 A1 - Document ID: US20140150424A1 - Status: Published application - Kind: A1 - Application number: 13/706,252 - Filed: 2012-12-05 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Alan Eden; Anthony Morelli - Web page: https://patentgrep.com/patent/US20140150424A1 ## CPC - F02B 33/44: Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs - F02B 37/183: {Arrangements of bypass valves or actuators therefor} - F02B 39/16: Other safety measures for, or other control of, pumps - 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) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A turbocharger wastegate is provided. The turbocharger wastegate comprises a cover plate actuatable in an open and closed position, the open position enabling exhaust gas flow through a turbine bypass conduit and the closed position inhibiting exhaust gas flow through the turbine bypass conduit and a vibration-dampening extension coupled to the cover plate radially extending beyond a radial periphery of the cover plate. Exhaust gas flow acting on the extension thus reduces vibration of the wastegate, thereby improving durability and reducing unwanted noise. ## Claims ### Claim 1 A turbocharger wastegate comprising: a cover plate actuatable in open and closed positions, the open position enabling exhaust gas flow through a turbine bypass conduit and the closed position inhibiting exhaust gas flow through the turbine bypass conduit; and a vibration-dampening extension coupled to the cover plate radially extending beyond a radial periphery of the cover plate. ### Claim 2 (depends on 1) The turbocharger wastegate of claim 1, wherein in a closed position when the cover plate is seated and sealed on a turbine bypass conduit flange, the cover plate does not extend radially beyond a radial periphery of the flange and the vibration-dampening extension extends radially beyond the radial periphery. ### Claim 3 (depends on 1) The turbocharger wastegate of claim 1, where a turbine outlet is offset from the cover plate in at least one of a radial and an axial direction. ### Claim 4 (depends on 1) The turbocharger wastegate of claim 1, further comprising an actuation linkage coupled to the vibration-dampening extension. ### Claim 5 (depends on 4) The turbocharger wastegate of claim 4, where the vibration-dampening extension is positioned between the cover plate and the actuation linkage. ### Claim 6 (depends on 4) The turbocharger wastegate of claim 4, where the actuation linkage is coupled to a central portion of the cover plate. ### Claim 7 (depends on 1) The turbocharger wastegate of claim 1, where the vibration-dampening extension extends into an exhaust gas flow from a turbine outlet when the cover plate is seated and sealed in the turbine bypass conduit and in a partially open configuration where the cover plate is spaced away from a turbine bypass conduit flange and impeding exhaust gas flow exiting the turbine bypass conduit. ### Claim 8 A turbocharger wastegate comprising: an actuatable cover plate coupled to a turbine bypass conduit; and a semi-annular vibration-dampening extension fixedly coupled to the cover plate asymmetrically extending radially beyond the cover plate and into an exhaust gas flow from a turbine outlet when the cover plate is in a closed position inhibiting gas flow through the turbine bypass conduit. ### Claim 9 (depends on 8) The turbocharger wastegate of claim 8, where the semi-annular vibration-dampening extension extends only 180° or less around the cover plate. ### Claim 10 (depends on 8) The turbocharger wastegate of claim 8, where the semi-annular vibration-dampening extension extends between 1° and 180° around the cover plate. ### Claim 11 (depends on 8) The turbocharger wastegate of claim 8, where the cover plate is spring loaded via an actuation linkage coupled to the vibration-dampening extension. ### Claim 12 (depends on 11) The turbocharger wastegate of claim 11, where the cover plate and the semi-annular vibration-dampening extension pivot about a rotational shaft included in the actuation linkage. ### Claim 13 (depends on 12) The turbocharger wastegate of claim 12, where a central axis of an outlet of the turbine bypass conduit is not perpendicular to a leading side of the cover plate when the wastegate is in the closed position. ### Claim 14 (depends on 8) The turbocharger wastegate of claim 8, where the semi-annular vibration-dampening extension has a curved radial edge. ### Claim 15 (depends on 8) The turbocharger wastegate of claim 8, where the cover plate and the vibration-dampening extension form a single continuous piece of material. ### Claim 16 A method for operating a turbocharger wastegate in an engine comprising: operating the turbocharger wastegate based on engine operation conditions; and imparting a side-force on a portion of a cover plate in the wastegate via a vibration-dampening extension. ### Claim 17 (depends on 16) The method of claim 16, where the side-force opposes a force imparted on the cover plate by an actuation linkage. ### Claim 18 (depends on 16) The method of claim 16, where imparting the side-force occurs when the wastegate is in a closed position or an open position when the wastegate is obstructing a portion of an exhaust flow exiting a turbine bypass conduit. ### Claim 19 (depends on 16) The method of claim 16, where operating the wastegate includes rotating the wastegate about a rotational shaft coupled to the cover plate. ### Claim 20 (depends on 16) The method of claim 16, where operating the wastegate based on engine operation conditions includes adjusting the wastegate position based on engine load.