Hybrid pump apparatus
AssigneeConcentric Birmingham Limited
InventorsPaul Shepherd, Sreekanth Gopinathan Nair
Life of this patent
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Abstract
A hybrid pump apparatus (100) having a pump subassembly having an inlet and an outlet an electrical drive (110) arranged to selectively drive the pump subassembly, a mechanical drive comprising a driven member (104) configured to receive a drive torque; and a clutch (160) in a load path between the driven member and the pump subassembly, the clutch being movable between a first condition in which the driven member drives the pump subassembly and a second condition in which the driven member can rotate freely relative to the pump sub assembly in which the clutch is a dog clutch.
Claims18
A vehicle hybrid pump apparatus comprising:
- a pump subassembly;
- an electrical drive arranged to selectively drive the pump subassembly;
- a mechanical drive comprising a driven member configured to receive a drive torque;
- and
- a clutch in a load path between the driven member and the pump subassembly, the clutch being movable between a first condition in which the driven member drives the pump subassembly and a second condition in which the driven member can rotate freely relative to the pump subassembly;
- in which the clutch is a dog clutch;
- wherein the clutch is biased to move to the first condition upon interruption of electrical power to the electrical drive.
A vehicle hybrid pump apparatus comprising:
- a pump subassembly;
- an electrical drive arranged to selectively drive the pump subassembly;
- a mechanical drive comprising a driven member configured to receive a drive torque;
- and
- a clutch in a load path between the driven member and the pump subassembly, the clutch being axially movable between a first condition in which the driven member drives the pump subassembly and a second condition in which the driven member can rotate freely relative to the pump subassembly;
- in which the clutch is a dog clutch and comprises a dog clutch component which is at least partially constructed from a ferromagnetic material;
- wherein an electromagnetic field produced by a stator of the electrical drive causes the clutch to axially move to the second condition.
A vehicle hybrid pump apparatus comprising:
- a pump subassembly;
- an electrical drive, including a rotor and a yokeless axial stator, the electrical drive being arranged to selectively drive the pump subassembly;
- a mechanical drive comprising a driven member configured to receive a drive torque;
- and
- a clutch in a load path between the driven member and the pump subassembly, the clutch being movable between a first condition in which the driven member drives the pump subassembly and a second condition in which the driven member can rotate freely relative to the pump subassembly;
- in which the clutch is a dog clutch comprising a first dog clutch component which is configured for operable connection to the driven member and a second dog clutch component;
- wherein the second dog clutch component is at least partially constructed from a ferromagnetic material and is resiliently biased by a spring to move the clutch to the first condition upon interruption of electrical power to the electrical drive;
- and
- wherein an electromagnetic field produced by the stator causes the clutch to move to the second condition.
Dependencies are inferred from the claim text.