LOCK-UP CONTROL DEVICE FOR VEHICLE
    7.
    发明公开

    公开(公告)号:EP3412939A1

    公开(公告)日:2018-12-12

    申请号:EP17747361.8

    申请日:2017-01-31

    IPC分类号: F16H61/14

    CPC分类号: F16H61/14 F16H61/143

    摘要: This lockup control device for a vehicle is provided with a CVT controller unit (12) and a torque converter (4), which is disposed between an engine (1) and a continuously variable transmission (6) and has a lockup clutch (3). When an LU engagement condition is satisfied when the lockup clutch (3) is in a disengaged state, the CVT controller unit (12), having established an LU differential pressure instruction up to an initial differential pressure, boosts the pressure according to a ramp differential pressure produced by a predetermined slope and engages the lockup clutch (3). During ramp control, if the amount of change in the turbine rotational speed of the torque converter (4) falls below a determination threshold value, switching is carried out to a second increase gradient (θ2) for which the increase gradient is lower than a first increase gradient (θ1) of the ramp differential pressure obtaining when the amount of change in the turbine rotational speed is at least equal to the determination threshold value.