Power take-off (PTO) assembly with a disconnect clutch
AssigneeDana Belgium N.V.
InventorsKurt Cattoor, Jan A. Bedert, Filip D. Schacht
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, includes a bi-directional pump in fluidic communication with a fluid reservoir and a hydraulic system and a disconnect clutch configured to mechanically disengage and disconnect the bi-directional pump from a transmission when a prime mover is in operation, and mechanically engage and connect the bi-directional pump to the transmission when the prime mover is shut down. The PTO assembly further includes an electro-mechanical valve configured to trigger engagement and disengagement of the disconnect clutch.
Claims20
A power take-off (PTO) assembly, comprising:
- a bi-directional pump in fluidic communication with a fluid reservoir and a hydraulic system;
- a disconnect clutch configured to:
- mechanically disengage and disconnect the bi-directional pump from a system when a prime mover is in operation;
- and
- mechanically engage and connect the bi-directional pump to the system when the prime mover is shut down;
- and
- an electro-mechanical valve configured to trigger engagement and disengagement of the disconnect clutch.
A method for operation of a power take-off (PTO) assembly, comprising:
- during prime mover operation, energizing an electro-mechanical valve to direct 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 hydraulic system of a multi-speed transmission;
- a dog clutch that mechanically connects and disconnects the multi-speed transmission from the bi-directional pump;
- and
- a solenoid valve that permits and inhibits fluid flow to an actuation piston in the dog clutch;
- wherein when the solenoid valve is energized, fluid flow to the actuation piston is permitted and when a pressure of the fluid applied on the actuation piston is above a threshold value, the actuation piston disengages the dog clutch;
- and
- wherein when the solenoid valve is de-energized, fluid flow to the actuation piston is inhibited and the actuation piston engages the dog clutch.
Dependencies are inferred from the claim text.