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US 12,372,121 B1Granted
Friction assisted dog clutch
AssigneeDana Belgium N.V.
InventorsFilip D. Schacht, Kurt Cattoor
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for a friction assisted dog clutch assembly, comprising: a piston; one or more pins, wherein the pins are adapted to be moved by the piston; one or more friction discs, wherein the friction discs have a number of slots and the plurality of pins pass through the slots; and an endplate, wherein the endplate has a number of recesses adapted to receive the pins.
Claims16
A clutch assembly, comprising:
- a piston;
- one or more pins, wherein the one or more pins are adapted to be moved by a hydraulic pressure;
- one or more friction discs, wherein the one or more friction discs have a number of slots and the one or more pins pass through the slots;
- and
- an endplate, wherein the endplate has a number of recesses adapted to receive the one or more pins, wherein at least one of:
- the number of slots is less than a number of pins;
- the one or more friction discs are mechanically coupled to a clutch gear and the endplate is mechanically coupled to a shaft via a clutch drum;
- the clutch assembly further comprises one or more piston return springs adapted to be compressed when the piston is moved towards the endplate;
- and
- the clutch assembly further comprises one or more pin return springs adapted to be compressed when the one or more pins are moved towards the endplate.
7 more elements
A method, comprising:
- in response to a request to engage a friction assisted dog clutch, moving a piston of the friction assisted dog clutch towards a friction disc of the friction assisted dog clutch;
- synchronizing rotation of a clutch gear and a shaft of the friction assisted dog clutch;
- moving a pin of the friction assisted dog clutch through a slot of the friction disc with the pin unlocked from an endplate of the friction assisted dog clutch;
- and
- locking the pin with the endplate of the friction assisted dog clutch.
2 more elements
A transmission, comprising:
- a friction assisted dog clutch, wherein the friction assisted dog clutch includes a piston coupled to a piston return spring, a pin coupled to a pin return spring, one or more friction discs, and an endplate including a recess adapted to receive the pin, each of the piston and the pin being adapted to be moved axially by a hydraulic pressure, and each of the one or more friction discs including a slot;
- and
- a controller including instructions stored on non-volatile memory, the instructions executable to:
- in response to a request to engage the friction assisted dog clutch,
- apply a first pressure to the piston, the first pressure greater than a first threshold pressure and less than a second threshold pressure, the first pressure adapted to compress the piston return spring;
- and
- apply a second pressure to the piston, the second pressure greater than the second threshold pressure and adapted to compress the pin return spring.
4 more elements
Dependencies are inferred from the claim text.