Engine with dual cam phaser for concentric camshaft
AssigneeGM Global Technology Operations LLC
InventorsJoseph J. Moon, Timothy L. Neal
Life of this patent
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Abstract
A cam phaser assembly may include a first stator, a first rotor, a second stator and a second rotor. The first stator may be driven by an engine crankshaft. The first rotor may be coupled to a first end of a concentric camshaft and located within the first stator. The first rotor and the first stator may cooperate to define a first set of fluid chambers. The second stator may be fixed for rotation with the first rotor and the first shaft. The second rotor may be coupled to the first end of the concentric camshaft and fixed for rotation with the second shaft and located within the second stator. The second rotor and the second stator may cooperate to define a second set of fluid chambers.
Claims20
A cam phaser assembly comprising:
- a first stator adapted to be rotationally driven by an engine crankshaft;
- a first rotor adapted to be coupled to a first end of a camshaft and located within the first stator and rotatable relative thereto, the first rotor and the first stator cooperating to define a first set of fluid chambers adapted to receive pressurized fluid for rotational displacement of the first rotor relative to the first stator;
- a second stator fixed for rotation with the first rotor;
- and
- a second rotor adapted to be coupled to the first end of the camshaft and located within the second stator and rotatable relative thereto, the second rotor and the second stator cooperating to define a second set of fluid chambers adapted to receive pressurized fluid for rotational displacement of the second rotor relative to the second stator.
A concentric camshaft assembly comprising:
- a concentric camshaft including:
- a first shaft having a first cam lobe fixed for rotation therewith;
- and
- a second shaft rotatable relative to and coaxial with the first shaft and having a second cam lobe fixed for rotation therewith;
- and
- a cam phaser assembly including:
- a first stator adapted to be rotationally driven by an engine crankshaft;
- a first rotor coupled to a first end of the concentric camshaft and located within the first stator and rotatable relative thereto, the first rotor and the first stator cooperating to define a first set of fluid chambers adapted to receive pressurized fluid for rotational displacement of the first rotor relative to the first stator;
- a second stator fixed for rotation with the first rotor and the first shaft;
- and
- a second rotor coupled to the first end of the concentric camshaft and fixed for rotation with the second shaft and located within the second stator and rotatable relative thereto, the second rotor and the second stator cooperating to define a second set of fluid chambers adapted to receive pressurized fluid for rotational displacement of the second rotor relative to the second stator.
An engine assembly comprising:
- an engine structure;
- a concentric camshaft rotationally supported on the engine structure and including:
- a first shaft having a first cam lobe fixed for rotation therewith;
- and
- a second shaft rotatable relative to and coaxial with the first shaft and having a second cam lobe fixed for rotation therewith;
- and
- a cam phaser assembly including:
- a first stator adapted to be rotationally driven by an engine crankshaft;
- a first rotor coupled to a first end of the concentric camshaft and located within the first stator and rotatable relative thereto, the first rotor and the first stator cooperating to define a first set of fluid chambers adapted to receive pressurized fluid for rotational displacement of the first rotor relative to the first stator;
- a second stator fixed for rotation with the first rotor and the first shaft;
- and
- a second rotor coupled to the first end of the concentric camshaft and fixed for rotation with the second shaft and located within the second stator and rotatable relative thereto, the second rotor and the second stator cooperating to define a second set of fluid chambers adapted to receive pressurized fluid for rotational displacement of the second rotor relative to the second stator.
Dependencies are inferred from the claim text.