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US 4,463,564 AGranted
Turbocharger turbine housing assembly
AssigneeThe Garrett Corporation
InventorCharles E. McInerney
Life of this patent
Estimating the term…
Abstract
A turbine housing assembly for use in a turbocharger having an exhaust gas driven turbine wheel for rotatably driving a compressor impeller. The assembly includes a turbine housing having an exducer passage into which exhaust gases are discharged from the turbine wheel. A bypass passage in the turbine housing and a pivoting wastegate valve cooperate to provide an efficient exhaust ejector for drawing gases through the exducer passage to reduce back-pressure on the engine. The turbine housing further includes an air vent for circulation of cooling air between the bypass and exducer passages.
Claims37
A turbine housing assembly for a turbocharger, comprising:
- a turbine housing having formed therein an inlet passage for receiving exhaust gases from an engine, a volute passage for guiding the exhaust gases from the inlet passage into driving communication with a turbine wheel, an outlet opening, an exducer passage for guiding the exhaust gases from the turbine wheel to the outlet opening, and a bypass passage communicating between the inlet and exducer passages, said bypass passage having an outlet aperture oriented to open into said exducer passage generally in a downstream-facing direction;
- and
- a wastegate valve including a disk-shaped valve head carried by said turbine housing for selectively opening and closing said bypass passage outlet aperture to flow of exhaust gases, said valve head being movable about a pivot axis disposed generally within said exducer passage at a position generally between said bypass passage outlet aperture and said turbine wheel for movement of said valve head between a closed position oriented generally perpendicular to a central axis of said bypass passage outlet aperture and an open position in an orientation approaching parallelism with the bypass passage outlet aperture central axis whereby said valve head substantially avoids blockage of exhaust gases flowing through said bypass passage outlet aperture.
A turbine housing assembly for a turbocharger having a turbine wheel rotatably driven by exhaust gases expelled from a combustion engine, comprising:
- a turbine housing having formed therein passage means for guiding the exhaust gases into driving communication with the turbine wheel, an outlet opening for discharge of the exhaust gases from said housing, an exducer passage for guiding the exhaust gases from the turbine wheel to the outlet opening, and a bypass passage for communicating a portion of the exhaust gases from said passage means to said exducer passage without driving communication with the turbine wheel, said bypass passage having an outlet aperture opening into said exducer passage in a generally downstream-facing direction;
- and
- a wastegate valve including a disk-shaped valve head carried by said turbine housing for selectively opening and closing said bypass passage outlet aperture, said valve head being movable about a pivot axis disposed generally within said exducer passage at a position generally between said bypass passage outlet aperture and said turbine wheel for movement of said valve head between a closed position oriented generally perpendicular to a central axis of said bypass passage outlet aperture and an open position in an orientation approaching parallelism with the bypass passage outlet aperture central axis whereby said valve head substantially avoids blockage of exhaust gases flowing through said bypass passage outlet aperture.
A turbine housing assembly for a turbocharger having a turbine wheel rotatably driven by exhaust gases expelled from a combustion engine, comprising:
- a turbine housing having formed therein passage means for guiding the exhaust gases into driving communication with the turbine wheel, an outlet opening for discharge of the exhaust gases from the turbine housing, an exducer passage having an axially extending portion into which exhaust gases pass from the turbine wheel and an angularly extending portion for guiding the exhaust gases from said axially extending portion to said outlet opening, and a bypass passage for guiding a portion of the exhaust gases from said passage means through a bypass passage outlet aperture into said angularly extending portion of said exducer passage with a flow into said exducer passage and through said outlet opening without substantial directional change;
- and
- a wastegate valve including a disk-shaped valve head carried by said turbine housing for selectively opening and closing said bypass passage outlet aperture, said valve head being movable about a pivot axis disposed generally within said angularly extending portion of said exducer passage at a position generally between said bypass passage outlet aperture and said axial portion of said exducer passage for movement of said valve head between a closed position oriented generally perpendicular to a central axis of said bypass passage outlet aperture and an open position in an orientation approaching parallelism with the bypass passage outlet aperture central axis whereby said valve head substantially avoids blockage of exhaust gases flowing through said bypass passage outlet aperture.
A turbine housing assembly for a turbocharger having a turbine wheel rotatably driven by exhaust gases expelled from a combustion engine, comprising:
- a turbine housing having formed therein passage means for guiding the exhaust gases into driving communication with the turbine wheel, an outlet opening for discharge of the exhaust gases from the turbine housing, an exducer passage having an axially extending portion into which exhaust gases pass from the turbine wheel and an angularly extending portion for guiding the exhaust gases from said axially extending portion to said outlet opening, and a bypass passage for guiding a portion of the exhaust gases from said passage means through a bypass passage outlet aperture into said angularly extending portion of said exducer passage with a flow into said exducer passage and through said outlet opening without substantial directional change;
- and
- a wastegate valve carried by said turbine housing and including a disk-shaped valve head for selectively opening and closing said bypass passage outlet aperture, and pivot means positioned generally within said angularly extending portion of said exducer passage and generally between said axially extending portion of said exducer passage and said bypass passage outlet aperture for pivotally moving said valve member with respect to said bypass passage outlet aperture, said pivot means being generally spaced laterally with respect to said axially extending portion of said exducer passage to substantially avoid blockage of exhaust gases flowing through said axially extending portion.
A unitary one-piece housing for a turbocharger having a turbine wheel rotatably driven by exhaust gases expelled from a combustion engine, comprising:
- a primary housing portion defining passage means for guiding the exhaust gases into driving communication with the turbine wheel;
- a first tubular member extending generally in an axial direction from said primary housing portion and defining an exducer passage into which the exhaust gases are discharged from the turbine wheel;
- and
- a second tubular member extending generally in an axial direction from said primary housing portion and merging with said first tubular member and defining a bypass passage with an outlet aperture opening into said exducer passage for flow of a portion of the exhaust gases from said passage means into said exducer passage without driving communication with the turbine wheel, said second tubular member having an intermediate stretch spaced from said first tubular member to define therebetween a vent for circulation of ambient air.
1 more element
A unitary one-piece turbine housing for a turbocharger having a turbine wheel rotatably driven by exhaust gases expelled from a combustion engine, comprising:
- a primary housing portion defining passage means for guiding the exhaust gases into driving communication with the turbine wheel;
- a first tubular member extending from said primary housing portion to define an exducer passage having an axially extending portion for receiving exhaust gases discharged from the turbine wheel and an angularly extending portion for receiving exhaust gases from said axially extending portion;
- and
- a second tubular member extending generally in an axial direction from said primary housing portion and merging with said first tubular member and defining a bypass passage with an outlet aperture opening into said exducer passage for flow of a portion of the exhaust gases from said passage means generally in a downstream direction into said angularly extending portion of said exducer passage without driving communication with the turbine wheel, said second tubular member having an intermediate stretch spaced from said first tubular member to define therebetween a vent for circulation of ambient air.
1 more element
A unitary one-piece turbine housing for a turbocharger having a turbine wheel rotatably driven by exhaust gases expelled from a combustion engine, comprising:
- a primary housing portion defining passage means for guiding the exhaust gases into driving communication with the turbine wheel;
- a first tubular member extending from said primary housing portion to define an exducer passage having in inlet end for receiving exhaust gases discharged from the turbine wheel and an outlet end formed on a central axis spaced laterally with respect to a central axis of said inlet end;
- and
- a second tubular member extending generally in an axial direction from said primary housing portion and merging with said first tubular member and defining a bypass passage with an outlet aperture opening into said exducer passage for flow of a portion of the exhaust gases from said passage means into said exducer passage without driving communication with the turbine wheel, said second tubular member having an intermediate stretch spaced from said first tubular member to define therebetween a vent for circulation of ambient air.
1 more element
Dependencies are inferred from the claim text.