Title:
WORK VEHICLE AND WORK VEHICLE CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2017/073612
Kind Code:
A1
Abstract:
According to the present invention, steering cylinders (21, 22) of a wheel loader (1) are driven by hydraulic pressure and change the steering angle (θs) of a front frame (11) with respect to a rear frame (12). A pilot valve (42) is connected to a joystick lever (24), controls, in accordance with the rotational angle (θin) of the joystick lever (24), the flow of oil that is supplied to the steering cylinders (21, 22), and restricts operation of the joystick lever (24) such that the deviation angle (α) thereof is below a certain angle (θ4). A force application part (27) applies assistance force or reaction force to operation of the joystick lever (24) by an operator. Before the operation of the joystick lever (24) is restricted by the pilot valve (42), a control part (28) controls the force application part (27) such that the latter reduces the assistance force or increases the reaction force.
Inventors:
TAKENAKA YUITA (JP)
NAKABAYASHI MASANOBU (JP)
IKARI MASANORI (JP)
NAKABAYASHI MASANOBU (JP)
IKARI MASANORI (JP)
Application Number:
PCT/JP2016/081728
Publication Date:
May 04, 2017
Filing Date:
October 26, 2016
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
B62D6/00; B62D5/04; B62D5/06; B62D11/08; B62D12/00; B62D101/00; B62D113/00; B62D119/00
Foreign References:
| JPH11105723A | 1999-04-20 | |||
| JPH0459483A | 1992-02-26 | |||
| JP2002331944A | 2002-11-19 | |||
| JP2015127164A | 2015-07-09 | |||
| JPH0268269U | 1990-05-23 |
Other References:
See also references of EP 3254934A4
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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