Power take-off (PTO) assembly with a disconnect clutch
AssigneeDana Belgium N.V.
InventorsKurt Cattoor, Filip D. Schacht, Jan Markey, Filip Van Raepenbusch, Jan A. Bedert
Life of this patent
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Abstract
Systems and methods for a power take-off (PTO) assembly. The PTO assembly, in one example, couples to a shaft and is driven by rotation of the shaft. The PTO assembly includes a disconnect clutch that selectively couples a bi-directional pump to the shaft. The disconnect clutch is passively actuated based on hydraulic system pressure to disengage the disconnect clutch when a prime mover is in operation and engage the disconnect clutch when the prime mover is shut down.
Claims19
A power take-off (PTO) assembly, comprising:
- a bi-directional pump in fluidic communication with a fluid reservoir and a hydraulic system;
- a passively actuated disconnect clutch configured to mechanically disconnect the bi-directional pump from a transmission when a prime mover is in operation and mechanically connect the bi-directional pump to the transmission when the prime mover is shut down;
- and
- a hydraulically actuated valve that is in fluidic communication with a hydraulic actuator of the passively actuated disconnect clutch.
A method, comprising:
- during prime mover operation, directing fluid from a hydraulic system to a disconnect clutch to sustain disengagement or initiate disengagement of the disconnect clutch and inhibit mechanical power transfer between a transmission and a bi-directional pump that is in fluidic communication with the hydraulic system;
- and
- during prime mover shutdown, inhibiting fluid delivery to the disconnect clutch to transition the disconnect clutch into an engaged position that permits mechanical power transfer between the transmission and the bi-directional pump.
A power take-off (PTO) assembly, comprising:
- a bi-directional pump in fluidic communication with a sump and a hydraulic system for a multi-speed transmission;
- a hydraulically actuated dog clutch that mechanically connects and disconnects the multi-speed transmission from the bi-directional pump;
- and
- a hydraulically actuated valve that permits and inhibits oil flow to an actuation piston in the hydraulically actuated dog clutch;
- wherein, when the hydraulically actuated valve is open and permitting oil flow that is above a threshold pressure to the actuation piston, the actuation piston disengages the hydraulically actuated dog clutch;
- and
- wherein, when the hydraulically actuated valve is closed and inhibiting oil flow to the actuation piston, the actuation piston engages the hydraulically actuated dog clutch.
Dependencies are inferred from the claim text.