Title:
WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2021/193155
Kind Code:
A1
Abstract:
Provided is a work vehicle which can flexibly address user demands concerning brake performance. In a wheel loader 1 equipped with an electronic brake control system, controllers 5, 5A, and 5B store first to eighth control characteristics Z1-Z8 which are set to have a relationship in which a brake valve control pressure Pi of an electromagnetic proportional valve 45 increases with increasing pedal angle θ of a brake pedal 43, and which are set so that the increase rate of the brake valve control pressure Pi with respect to the pedal angle θ varies at an angle less than or equal to a predetermined pedal angle θth. The controllers 5, 5A, and 5B select one control characteristic from the first to eighth control characteristics Z1-Z8 on the basis of at least either a vehicle speed V or a bottom pressure P, and if the pedal angle θ detected by a potentiometer 32 is less than or equal to the predetermined pedal angle θth, calculate the brake valve control pressure Pi on the basis of the one control characteristic, and output a command current value to the electromagnetic proportional valve 45.
Inventors:
TANAKA SHINICHIRO (JP)
KODERA HIROYASU (JP)
KODERA HIROYASU (JP)
Application Number:
PCT/JP2021/010140
Publication Date:
September 30, 2021
Filing Date:
March 12, 2021
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/20; B60T8/94; B60T13/14; B60T13/68
Foreign References:
| JP6124840B2 | 2017-05-10 | |||
| JP2016223462A | 2016-12-28 | |||
| JP2013248931A | 2013-12-12 | |||
| JP2017177984A | 2017-10-05 | |||
| JP2001130439A | 2001-05-15 |
Other References:
See also references of EP 4001518A4
Attorney, Agent or Firm:
THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)
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