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US 9,964,177 B2Granted
Dual mass flywheel
AssigneeDayco Europe S.R.L.
InventorsGianluca Cariccia, Giacomo Giansetto, Andrea Montani, Andrea Guala
Life of this patent
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Abstract
The dual mass flywheel comprises a spring assembly (4; 104; 112; 128; 129), if necessary, with two stages of which one can include a spiral spring. Furthermore, the dual mass flywheel comprises a friction damping system (111) that applies torque independently of the rotational speed of the flywheel.
Claims15
A dual mass flywheel comprising:
- a primary mass,
- a secondary mass angularly movable with respect to said primary mass, and
- a spring assembly to connect said primary mass to said secondary mass, the spring assembly comprising:
- a first spring stage comprising at least one spiral spring,
- a second spring stage having a torsional stiffness greater than that of the said first spring stage, and
- a structure configured to connect said first spring stage in series with said second spring stage,
- wherein said at least one spiral spring comprises a first end portion rigidly connected to said primary mass or to said secondary mass and a second end portion connected to a body of said structure, said first spring stage as a whole being placed side by side, in the axial direction, to said second spring stage.
4 more elements
Dependencies are inferred from the claim text.