Camshaft having a tuned mass damper
AssigneeGM Global Technology Operations LLC
InventorsCraig D. Marriott, Hong Wai Nguyen, Ronald Jay Pierik
Life of this patent
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Abstract
A camshaft assembly may include a first shaft adapted to be rotationally driven, a first lobe member fixed for rotation with the first shaft, and a torsional damper fixed to the first shaft. The torsional damper may include a mass structure fixed to the first shaft and an elastic member disposed between and coupling the mass structure and the first shaft. The elastic member may have a spring constant providing a first sideband natural frequency and a second sideband natural frequency for the camshaft assembly.
Claims20
A camshaft assembly comprising:
- a first shaft adapted to be rotationally driven;
- a first lobe member fixed for rotation with the first shaft;
- and
- a torsional damper fixed to the first shaft including a mass structure and an elastic member disposed between and coupling the mass structure and the first shaft, the elastic member having a spring constant providing a first sideband natural frequency and a second sideband natural frequency for the camshaft assembly.
A camshaft assembly comprising:
- a first shaft assembly including a first shaft and a first lobe member fixed to the first shaft, the first shaft adapted to be rotationally driven and defining an axially extending bore;
- and
- a second shaft assembly including a second shaft disposed within the axially extending bore and rotatable relative to the first shaft and including a first end adapted to be rotationally driven and a second end opposite the first end, a second lobe member rotationally supported on the first shaft and fixed for rotation with the second shaft, and a torsional damper fixed to the second shaft.
A camshaft assembly comprising:
- a first shaft assembly including a first shaft and a first lobe member fixed to the first shaft, the first shaft adapted to be rotationally driven and defining an axially extending bore;
- and
- a second shaft assembly including a second shaft disposed within the axially extending bore and rotatable relative to the first shaft and including a first end adapted to be rotationally driven and a second end opposite the first end, a second lobe member rotationally supported on the first shaft and fixed for rotation with the second shaft, and a torsional damper fixed to the second shaft including an annular ring and an elastic member disposed between and coupling the annular ring to the second shaft, the elastic member adapted to provide a first rotational oscillation of the annular ring that is out of phase with a corresponding second rotational oscillation of the second shaft during rotation of the second shaft.
Dependencies are inferred from the claim text.