Lock-up device for torque converter
AssigneeExedy Corporation
InventorsKen Mototsune, Kazuhito Maeda
Life of this patent
Estimating the term…
Abstract
A lock-up device includes a clutch portion and a damper mechanism. The clutch portion includes a clutch output member, a clutch plate, an oil chamber plate having a disc shape and a piston. The oil chamber plate is disposed between a front cover and an inner peripheral part of a turbine, while being axially immovable with respect to the front cover. The piston is disposed between the front cover and the oil chamber plate while being axially movable. The piston forms a first oil chamber for lock-up actuation together with the oil chamber plate, and forms a second oil chamber for lock-up releasing together with the front cover.
Claims9
A lock-up device for a torque converter, the lock-up device being configured to transmit a torque from a front cover to a transmission-side member through a turbine of the torque converter, the lock-up device comprising:
- a clutch portion disposed between the front cover and the turbine, the clutch portion being configured to transmit or block the torque;
- and
- a damper mechanism configured to transmit the torque from the clutch portion to the turbine while being configured to absorb and attenuate a torsional vibration, wherein
- the clutch portion includes
- a clutch output member configured to output the torque to the damper mechanism;
- a clutch plate configured to transmit the torque between the front cover and the clutch output member;
- an oil chamber plate having a disc shape, the oil chamber plate being disposed between the front cover and an inner peripheral part of the turbine while being axially immovable with respect to the front cover;
- a piston disposed between the front cover and the oil chamber plate while being axially movable, the piston and the oil chamber plate forming a first oil chamber for lock-up actuation therebetween, the piston and the front cover forming a second oil chamber for lock-up releasing therebetween, the piston being configured to set the clutch portion in an engaged state by an operating oil to be supplied to the first oil chamber;
- and
- a seal member disposed between the piston and the front cover to seal the second oil chamber.
Dependencies are inferred from the claim text.