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    WORK VEHICLE AND WORK VEHICLE CONTROL METHOD
    128.
    发明公开
    WORK VEHICLE AND WORK VEHICLE CONTROL METHOD 审中-公开

    公开(公告)号：EP3412536A1

    公开(公告)日：2018-12-12

    申请号：EP17806613.0

    申请日：2017-05-29

    申请人： Komatsu Ltd.

    发明人： TAKENAKA, Yuita ,  NAKABAYASHI, Masanobu ,  IKARI, Masanori

    IPC分类号： B62D5/28 ,  B62D5/09 ,  B62D6/00 ,  B62D12/00

    CPC分类号： B62D5/09 ,  B62D5/28 ,  B62D6/00 ,  B62D12/00

    摘要： Steering cylinders (21 and 22) in a wheel loader (1) are driven by hydraulic pressure and perform an articulation in which the steering angle θs of a front frame (11) is changed with respect to a rear frame (12) in response to the operation of a joystick lever (24). A pilot valve (42) is linked to the joystick lever (24) and controls the flow of fluid supplied to the steering cylinders (21 and 22) so that the steering angle θs matches the rotation angle θin. A force imparting component (27) imparts an assisting force or a counterforce to the operation of the joystick lever (24). A controller (28) controls the force imparting component (27) so as to generate resistance against the operation of the joystick lever on the basis of a deviation angle ±θ7, which is an example of the start timing of the articulation.

    A WHEEL STEERING SYSTEM FOR CONTROLLING A STEERING ANGLE OF A SECOND PAIR OF STEERABLE WHEELS OF A VEHICLE
    129.
    发明授权
    A WHEEL STEERING SYSTEM FOR CONTROLLING A STEERING ANGLE OF A SECOND PAIR OF STEERABLE WHEELS OF A VEHICLE 有权

    公开(公告)号：EP3060453B1

    公开(公告)日：2018-09-26

    申请号：EP13895937.4

    申请日：2013-10-21

    申请人： Volvo Truck Corporation

    发明人： LARSSON, Lena ,  PETTERSSON, Emil

    IPC分类号： B62D7/14 ,  B62D12/00 ,  B62D13/04

    CPC分类号： B62D7/144 ,  B62D12/00 ,  B62D13/04

    摘要： The disclosure concerns a wheel steering system (200) for controlling a steering angle (βι, β2) of a second pair of steerable wheels (121, 122) of a vehicle (101) that is suitable for transporting a load. The vehicle comprises at least a first and a second pair of steerable wheels (1 1 1, 112, 121, 122) and a first and second pair of non steerable wheels (131, 132, 141, 142). The wheel steering system (200) comprising a steering angle detection device (201) for detecting at least one vehicle steering angle (a, ai, 02), and control system (204) configured to determine a steering geometry of the vehicle (101) and to control the steering angle (β^ β2) of at least each of the second pair of steerable wheels (121, 122) based on at least the at least one detected steering angle (a, a-i, a2) and the determined steering geometry of the vehicle (101).