Magneto-rheological damper with ferromagnetic housing insert
AssigneeDelphi Technologies, Inc.
InventorsIlya Lisenker, Patrick Neil Hopkins
Life of this patent
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Abstract
A magneto-rheological (“MR”) damper having a damper body tube containing an MR fluid. A piston assembly is disposed in the damper body tube and forms an annular flow gap between the piston assembly and the damper body tube. The piston assembly has a piston core containing ferrous material and an electromagnetic coil mounted on the piston core for generating a magnetic field. The damper further includes a ferromagnetic member positioned outside of the damper body tube substantially adjacent the piston assembly for providing at least a part of a magnetic flux return path for the magnetic field.
Claims9
A magneto-rheological (“MR”) fluid damper comprising:
- a damper body tube containing an MR fluid;
- a piston assembly disposed in the damper body tube to form an annular flow gap between the piston assembly and the damper body tube, the piston assembly comprising
- a piston core containing ferrous material and an electromagnetic coil mounted on the piston core for generating a magnetic field, and
- a flux ring surrounding and operatively coupled to the piston core to form the annular flow gap with the piston core, the flux ring being in sealing, sliding contact with an inner surface of the damper body tube;
- and
- a ferromagnetic member operatively positioned outside of the damper body tube substantially adjacent the piston assembly for providing at least a part of a magnetic flux return path for the magnetic field, the ferromagnetic member operatively cooperating with the flux ring to strengthen the magnetic field passing through the annular flow gap.
A magneto-rheological (“MR”) fluid damper comprising:
- a housing;
- a damper body tube containing an MR fluid and disposed in the housing and is movable relative to the housing;
- a piston assembly disposed in the damper body tube to form an annular flow gap between the piston assembly and the damper body tube, the piston assembly comprising a piston core containing ferrous material and an electromagnetic coil mounted on the piston core for generating a magnetic field;
- and
- a ferromagnetic member operatively coupled to the housing outside of the damper body tube and substantially adjacent the piston assembly for providing at least a part of a magnetic flux return path for the magnetic field.
Dependencies are inferred from the claim text.