Control method for dual-clutch transmission with multiple first gears

    公开(公告)号:US10648540B2

    公开(公告)日:2020-05-12

    申请号:US15850796

    申请日:2017-12-21

    Abstract: A dual-clutch transmission assembly and method for controlling the same is provided where the torque generated by an engine is split between first and second shafts. Torque is supplied to the first shaft by a first clutch and torque is supplied to the second shaft by a second clutch. A first gearset is carried on the first shaft and a second gearset is carried on the second shaft. The first gearset includes a primary first gear and the second gearset includes a duplicate first gear. The first and second shafts receive torque from a transmission input shaft in response to contemporaneous engagement of the primary first gear, the duplicate first gear, and the first and second clutches, which can be used during vehicle launch to split the torque applied to the first and second clutches.

    Dual-clutch transmission with multiple first gears

    公开(公告)号:US09897165B2

    公开(公告)日:2018-02-20

    申请号:US14941488

    申请日:2015-11-13

    Abstract: A dual-clutch transmission assembly is disclosed that splits the torque generated by an engine between first and second layshafts. A first input hub is connected to the first layshaft by a first clutch and a second input hub is connected to the second layshaft by a second clutch. A first gearset is carried on the first layshaft and a second gearset is carried on the second layshaft. The first gearset includes a primary first gear and the second gearset includes a duplicate first gear. The first and second layshafts receive torque from the transmission input shaft in response to contemporaneous engagement of the primary first gear, the duplicate first gear, and the first and second clutches, which can be used during vehicle launch to split the torque applied to the first and second clutches.

    Dual-clutch transmission with planetary gearset and multiple first gears

    公开(公告)号:US10830313B2

    公开(公告)日:2020-11-10

    申请号:US16871511

    申请日:2020-05-11

    Abstract: A dual-clutch transmission assembly where engine torque is split between first and second shafts. Torque is supplied to the first shaft by a first clutch and torque is supplied to the second shaft by a second clutch. A first gearset is carried on the first shaft and a second gearset is carried on the second shaft. The first gearset includes a primary first gear and the second gearset includes a duplicate first gear. The first and second shafts receive torque from a transmission input shaft in response to contemporaneous engagement of the primary first gear, the duplicate first gear, and the first and second clutches, which can be used during vehicle launch to split the torque applied to the first and second clutches. Both the primary first gear and duplicate first gear meshingly engage first and second counter shaft gearsets, which are rotatably coupled to a transmission output shaft.

    Multi-level torque clutch
    5.
    发明授权

    公开(公告)号:US09920795B2

    公开(公告)日:2018-03-20

    申请号:US14956861

    申请日:2015-12-02

    CPC classification number: F16D13/70 F16D13/52 F16D25/0638

    Abstract: A clutch assembly is disclosed having a clutch housing and a shaft. A clutch pack selectively couples rotation of the clutch housing and the shaft. The clutch pack includes a primary backing plate, a reaction plate, first and second friction plates disposed between the backing plate and the reaction plate, and a secondary backing plate disposed between the first and second friction plates. A first actuator selectively applies pressure to the reaction plate to move the reaction plate toward the primary backing plate. A second actuator controls movement of the secondary backing plate to switch the clutch pack between a low torque state and a high torque state. In the low torque state, the secondary backing plate cannot move longitudinally toward the primary backing plate beyond a locked position. In the high torque state, the secondary backing plate can move beyond the locked position.

    Clutch with opposite load application

    公开(公告)号:US09677622B2

    公开(公告)日:2017-06-13

    申请号:US15051085

    申请日:2016-02-23

    CPC classification number: F16D13/52 F16D13/46 F16D25/0638

    Abstract: A clutch assembly that is less prone to overheating is disclosed. The clutch assembly includes a clutch housing, a shaft, and a clutch pack. The clutch pack includes a first apply plate, a second apply plate, a plurality of friction plates, and a plurality of reaction plates. The clutch assembly further includes a first actuator and a second actuator. The first actuator applies pressure to the first apply plate in a first direction to move the first apply plate toward the second apply plate. The second actuator applies pressure to the second apply plate in a second direction to move the second apply plate toward the first apply plate. The first direction is opposite the second direction such that the first and second actuators apply pressure to the clutch pack in opposing directions. This reduces localized temperature spikes in the clutch pack.

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