Intake manifold assembly
AssigneeGM Global Technology Operations LLC
InventorsJIAN JUN ZHANG, Ko-Jen Wu, William A. Berry, James C. Elmslie
Life of this patent
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Abstract
An intake manifold assembly is provided having a plenum and an intake runner in communication with the plenum. The intake runner has an outlet end. A selectively closeable throttle plate is disposed within the intake runner and is operable to selectively limit the flow of intake air through the intake runner. The throttle plate is selectively and variably movable between a fully opened position and a fully closed position. An orifice, defined by one of the intake runner and the throttle plate, has an opening area of approximately fifteen percent or less of a cross sectional area of the outlet end. An internal combustion engine incorporating the intake manifold assembly is also disclosed.
Claims20
An intake manifold assembly for an internal combustion engine comprising:
- a plenum;
- at least one intake runner in communication with said plenum;
- wherein said at least one intake runner has an outlet end;
- a selectively closeable throttle plate disposed within said outlet end of said at least one intake runner and operable to selectively limit the flow of intake air through said outlet end;
- wherein said throttle plate is selectively and variably movable between a fully opened position and a fully closed position;
- and
- an orifice defined by said throttle plate and having an opening area of approximately fifteen percent or less of a cross sectional area of said outlet end where said throttle plate is positioned.
An intake manifold for an internal combustion engine comprising:
- a plenum;
- at least one intake runner in communication with said plenum;
- wherein said at least one intake runner has an outlet end;
- a selectively closeable throttle plate disposed within said outlet end of said at least one intake runner and operable to selectively limit the flow of intake air through said outlet end;
- wherein said throttle plate is selectively and variably movable between a fully opened position and a fully closed position;
- an orifice defined by said at least one intake runner and having an opening area of approximately fifteen percent or less of a cross sectional area of said outlet end;
- and
- wherein said orifice is positioned downstream of said throttle plate.
An internal combustion engine comprising:
- a cylinder head defining an intake port;
- an intake manifold assembly mounted with respect to said cylinder head and in communication with said intake port, said intake manifold assembly comprising:
- a plenum;
- at least one intake runner in communication with said plenum;
- wherein said at least one intake runner has an outlet end and an interior wall;
- a selectively closeable throttle plate disposed within said outlet end of said at least one intake runner and operable to selectively limit the flow of intake air through said outlet end;
- wherein said throttle plate is selectively and variably movable between a fully opened position and a fully closed position;
- an orifice defined by one of said at least one intake runner and said throttle plate, said orifice having an opening area of approximately fifteen percent or less of a cross sectional area of said outlet end;
- a lip portion formed on said interior wall and operable to sealingly engage said throttle plate when in said fully closed position;
- and
- wherein said at least one intake runner has an inlet end substantially adjacent to said plenum volume and wherein said outlet end is substantially adjacent to the internal combustion engine, said throttle plate being disposed substantially adjacent to said outlet end.
Dependencies are inferred from the claim text.