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US 2003/0115869 A1Published application
Variable geometry nozzle for radial turbines
AssigneeCaterpillar Inc.
InventorsFrank G. Gerke, Beth A. Hinchee, Mark D. Moeckel
Life of this patent
Estimating the term…
Abstract
A variable geometry nozzle suitable for a radial turbine in a turbocharger for an internal combustion engine. The turbine inlet, turbine outlet or both include a vane assembly having a housing and an adjustable cartridge movable in the housing. Each cartridge has vanes having a plurality of vane sections. Each vane section provides a vane geometry different than the vane geometries of the other vane sections.
Claims22
An internal combustion engine, comprising:
- a plurality of combustion cylinders;
- an exhaust manifold coupled with said combustion cylinders;
- an intake manifold coupled with said combustion cylinders;
- a turbocharger including a turbine defining an exhaust gas flow path having a turbine inlet coupled with said exhaust manifold and a turbine outlet, and a compressor having a compressor inlet and a compressor outlet, said compressor outlet coupled with said intake manifold;
- and
- an adjustable vane assembly for at least one of said turbine inlet and said turbine outlet, said adjustable vane assembly including a housing, a controllable vane cartridge disposed in said housing, said cartridge having vanes therein, said vanes having a plurality of vane sections each configured in a different vane geometry, and an adjustment device associated with said cartridge, said cartridge having different positions in said housing placing different vane sections in said exhaust gas flow path.
3 more elements
A turbocharger comprising:
- a turbine defining an exhaust gas flow path therethrough, a turbine inlet to said flow path and a turbine outlet from said flow path;
- a compressor driven by said turbine and including a compressor inlet and a compressor outlet;
- and
- an adjustable vane assembly for at least one of said turbine inlet and said turbine outlet, said adjustable vane assembly including a housing, a controllable vane cartridge disposed in said housing, said cartridge having vanes therein, said vanes having a plurality of vane sections each configured in a different vane geometry, and an adjustment device associated with said cartridge, said cartridge having different positions in said housing placing different vane sections in said exhaust gas flow path.
1 more element
A method of operating an internal combustion engine, comprising the steps of:
- providing a plurality of combustion cylinders, an first exhaust manifold and an intake manifold;
- transporting exhaust gas from said combustion cylinders to said exhaust manifold;
- providing a turbocharger including a turbine having an exhaust gas flow path there through, a turbine inlet and a turbine outlet, and a compressor having a compressor inlet and a compressor outlet;
- providing an adjustable vane assembly for at least one of said turbine inlet and said turbine outlet, and providing in said vane assembly a housing, and vanes having a plurality of vane sections each of a different vane geometry, and an adjustment device for move said vane sections into and out of said flow path;
- rotatably driving said turbine with exhaust gas introduced at said turbine inlet;
- introducing combustion gas at said compressor inlet;
- transporting combustion gas from said compressor outlet to said intake manifold;
- sensing at least one of operating conditions of said engine and performance of said turbocharger;
- controlling said adjustment device in response to at least one of said engine operating conditions and said performance of said turbocharger;
- moving said vanes in said housing;
- and
- positioning a selected vane section in said exhaust gas flow path.
9 more elements
Dependencies are inferred from the claim text.