公开(公告)号：US20220195703A1

公开(公告)日：2022-06-23

申请号：US17598958

申请日：2020-05-20

Applicant: KOMATSU LTD.

Inventor： Yukihisa TAKAOKA ,  Kota BEPPU ,  Yuto FUJII ,  Toru KURAKANE

IPC: E02F9/26

Abstract: A controller is configured to determine a target excavation depth of a first pass based on a position of an excavation end, a target soil amount, and an excavation distance. The controller is configured to move a work implement to the target excavation depth of the first pass to execute an excavation of the first pass. The controller is configured to acquire an actual soil amount excavated in the first pass. The controller is configured to modify the target soil amount based on the actual soil amount. The controller is configured to determine the target excavation depth of a second pass based on the modified target soil amount. The controller is configured to move the work implement to the target excavation depth of the second pass to execute the excavation of the second pass.

公开(公告)号：US20180363269A1

公开(公告)日：2018-12-20

申请号：US15562925

申请日：2016-11-09

Applicant: KOMATSU LTD.

Inventor： Yuto FUJII ,  Haruki NISHIGUCHI

IPC: E02F3/43 ,  E02F3/30 ,  E02F3/32 ,  E02F9/22 ,  E02F9/26

Abstract: A work vehicle includes a bucket which can perform a tilting operation with a hydraulic oil, a valve adjusting a flow rate of the hydraulic oil having the bucket perform the tilting operation, an electromagnetic proportional control valve generating a pilot pressure guided to the valve, a controller outputting a current to the electromagnetic proportional control valve, and a first sensor for detecting the tilting operation. The controller detects a horizontal state of the bucket based on an output from the first sensor. The controller adjusts a value for the current output to the electromagnetic proportional control valve after the horizontal state of the bucket is detected, and starts calibration of data for predicting an operation speed of the bucket in the tilting operation.

公开(公告)号：US20160145827A1

公开(公告)日：2016-05-26

申请号：US14419542

申请日：2014-09-10

Applicant: KOMATSU LTD.

Inventor： Yoshiki KAMI ,  Takeo YAMADA ,  Yuto FUJII ,  Takeshi TAKAURA

IPC: E02F3/43 ,  E02F3/30

CPC classification number: E02F3/435 ,  E02F3/30 ,  E02F3/437 ,  E02F9/262 ,  E02F9/265 ,  G05B19/416 ,  G05B2219/40043 ,  G05B2219/43203 ,  G05B2219/45012

Abstract: A work vehicle includes a boom, an arm, a bucket, an arm control member, a speed limit determination portion, and a target speed determination portion. The speed limit determination portion determines a speed limit for limiting a speed of a cutting edge of the bucket in accordance with a distance between a cutting edge and a design surface. The target speed determination portion determines a target speed of the boom based on the speed limit. The speed limit determination portion decides on a speed limit calculated based on correlation between the speed limit and the distance between the design surface and the cutting edge when an amount of operation of the arm control member is equal to or greater than a prescribed amount and decides on a speed limit lower than the speed limit calculated based on the correlation when the amount of operation is smaller than the prescribed amount.

Abstract translation: 工作车辆包括吊杆，臂，铲斗，臂控制构件，限速确定部和目标速度确定部。 速度限制判定部根据切削刃和设计面之间的距离，决定限制铲斗的切削刃速度的速度限制。 目标速度确定部分基于速度限制来确定起重臂的目标速度。 速度限制判断部判定在臂控制部件的动作量为规定量以上的情况下，基于速度限制与设计面与切削刃之间的距离的关系而计算出的速度限制，并且决定 在比操作量小于规定量时基于相关性计算的速度限制的速度限制。