WORK VEHICLE

WIPO Patent Application WO/2020/188943

A1

Provided is a work vehicle that can reduce costs for mounting an automatic brake system while enabling attention attraction to an operator during operation of an automatic brake.　In an HST driving wheel loader (1), a controller (5) controls tilting so that, when a vehicle body is traveling backward to approach an obstacle and a measurement distance (L) measured by a millimeter wave radar (31) is determined to reach a braking start distance (L1), a maximum displacement volume (q1max) of an HST pump (41) becomes smaller or a minimum displacement volume (q2min) of an HST motor (43) becomes larger as the distance (L) between the vehicle body and the obstacle becomes shorter. In an anterior stage of the anterior stage and a posterior stage for controlling the tilting, a rate in change of the maximum displacement volume (q1max) of the HST pump (41) or a rate in change of the minimum displacement volume (q2min) of the HST motor (43) with respect to the change in the distance L between the vehicle body and the obstacle is set larger compared with a rate in change in the posterior stage.

TANAKA TETSUJI (JP)
HYODO KOJI (JP)
NUKII MASAKI (JP)
OKAZAKI SHOTA (JP)

PCT/JP2019/050788

September 24, 2020

December 25, 2019

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HITACHI CONSTRUCTION MACH CO (JP)

F16H63/44; F16H61/02; F16H61/421; F16H61/431; F16H61/66

WO2019003760A1

2019-01-03

JP3219005U	2018-11-22
JP2008223898A	2008-09-25
JPH10122363A	1998-05-15
US20150315000A1	2015-11-05
JP2000135957A	2000-05-16

THE PATENT BODY CORPORATE TAKEWA INTERNATIONAL PATENT OFFICE (JP)

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