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公开(公告)号：US20170107688A1
公开(公告)日：2017-04-20
申请号：US15101106
申请日：2015-10-16
Applicant: KOMATSU LTD.
Inventor： Yuto FUJII , Tsutomu IWAMURA , Masanobu SEKI
CPC classification number: E02F3/3681 , E02F3/32 , E02F3/3677 , E02F3/40 , E02F3/435 , E02F9/264 , E02F9/265 , G01B21/02 , G01C15/12 , G01S19/45
Abstract: A hydraulic excavator is equipped with a bucket, a tilt cylinder, a fourth stroke sensor, and a bucket information computing unit. The bucket is able to rotate about the center of a tilt axis. The tilt cylinder causes the bucket to rotate about the center of the tilt axis. The fourth stroke sensor detects a stroke length of the tilt cylinder. The bucket information computing unit obtains a tilt angle of the bucket on the basis of the stroke length detected by the fourth stroke sensor.
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公开(公告)号：US20160258135A1
公开(公告)日：2016-09-08
申请号：US14409209
申请日：2014-09-10
Applicant: KOMATSU LTD.
Inventor： Yuki SHIMANO , Yuto FUJII , Takeshi TAKAURA
CPC classification number: E02F9/265 , E02F3/32 , E02F3/435 , E02F9/2029 , E02F9/2221 , E02F9/262
Abstract: A stop control unit carries out control, when a moving speed of a bucket in a direction toward target design topography is the same in both of a first specifying state in which a bucket weight specifying portion specifies a weight of the bucket as large and a second specifying state in which the bucket weight specifying portion specifies a weight of the bucket as small, such that the moving speed of the bucket in the direction toward the target design topography is reduced from a position more distant from the target design topography in the first specifying state than in the second specifying state.
Abstract translation: 当铲斗重量指定部指定铲斗重量大的第一指定状态和铲斗重量指定部分指定铲斗重量的第二指定状态和铲斗重量指定部分指定铲斗重量的第二指定状态时，停止控制单元执行在朝向目标设计地形的方向上的铲斗的移动速度相同的控制 指定铲斗重量指定部指定铲斗的重量的小的状态，使得在朝向目标设计地形的方向上的铲斗的移动速度从第一指定中的距离目标设计地形更远的位置减小 状态比第二指定状态。
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公开(公告)号：US20160312434A1
公开(公告)日：2016-10-27
申请号：US14655130
申请日：2015-02-02
Applicant: KOMATSU LTD.
Inventor： Satoru SHINTANI , Yuto FUJII , Masanobu SEKI , Masashi ICHIHARA , Yoshiki KAMI
CPC classification number: E02F3/435 , B60Y2200/412 , B60Y2400/306 , B60Y2400/406 , B60Y2400/92 , E02F3/32 , E02F3/3677 , E02F3/3681 , E02F3/43 , E02F9/2004 , E02F9/2037 , E02F9/22 , E02F9/26 , E02F9/261 , E02F9/262 , E02F9/264 , E02F9/265
Abstract: A work vehicle includes a vehicular body, a work implement, an angle sensor, and a work implement control unit. A bucket is rotatable with respect to an arm around a bucket axis in parallel to an arm axis and a tilt axis orthogonal to a bucket axis. The angle sensor is provided in the bucket and detects an angle of inclination of the bucket with respect to a horizontal plane. The work implement control unit starts control of the work implement in which an operation of the work implement is controlled at least partially automatically when an angle of inclination of the bucket detected by the angle sensor is smaller than a first threshold value, and does not start control of the work implement when an angle of inclination of the bucket detected by the angle sensor is equal to or greater than the first threshold value.
Abstract translation: 工作车辆包括车身，作业工具，角度传感器和作业工具控制单元。 铲斗相对于围绕斗杆轴线的臂可平行于臂轴线和与铲斗轴线正交的倾斜轴线相对地旋转。 角度传感器设置在铲斗中并且检测铲斗相对于水平面的倾斜角度。 当由角度传感器检测到的铲斗的倾斜角度小于第一阈值时，作业工具控制单元开始对作业工具的操作进行至少一部分自动控制的作业工具的控制，并且不起动 当由角度传感器检测到的铲斗的倾斜角度等于或大于第一阈值时，对作业工具的控制。
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公开(公告)号：US20160069040A1
公开(公告)日：2016-03-10
申请号：US14419507
申请日：2014-09-10
Applicant: KOMATSU LTD.
Inventor： Yoshiki KAMI , Takeo YAMADA , Toru MATSUYAMA , Yuto FUJII , Takeshi TAKAURA
Abstract: A work vehicle includes a speed limit calculation portion, a speed determination portion, an adjustment portion, and a boom speed determination portion. The speed limit calculation portion calculates a speed limit for limiting a speed of a cutting edge of a bucket. The speed determination portion determines whether or not a speed of raising the boom has been lowered when an amount of operation of an arm is smaller than a prescribed amount. The adjustment portion delays speed change to the speed limit. The boom speed determination portion determines a target speed of the boom based on the speed limit after delay by the adjustment portion when it is determined that the speed of raising the boom has been lowered, and determines a target speed of the boom based on the speed limit calculated when it is not determined that the speed of raising the boom has been lowered.
Abstract translation: 工作车辆包括速度限制计算部分，速度确定部分，调节部分和动臂速度确定部分。 速度限制计算部分计算用于限制铲斗的切割刃的速度的速度限制。 当臂的操作量小于规定量时，速度确定部分确定升降臂的升高速度是否已经降低。 调整部分将速度变化延迟到速度限制。 当确定悬臂的升高速度已经降低时，起重臂速度确定部分基于调节部分的延迟之后的速度限制来确定起重臂的目标速度，并且基于速度确定起重臂的目标速度 当没有确定提升吊杆的速度已经降低时计算出的极限。
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公开(公告)号：US20180283418A1
公开(公告)日：2018-10-04
申请号：US15562919
申请日：2016-11-09
Applicant: KOMATSU LTD.
Inventor： Atsushi ISHIDA , Yuto FUJII , Tsutomu IWAMURA , Haruki NISHIGUCHI
CPC classification number: F15B19/002 , E02F3/32 , E02F3/435 , E02F9/2228 , E02F9/2267 , E02F9/2285 , E02F9/2296 , E02F9/264 , F15B11/04 , F15B13/043
Abstract: A work vehicle includes a work implement, a valve adjusting a flow rate of a hydraulic oil operating the work implement, 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 sensor for detecting an operation of the work implement. The controller increases stepwise a current value of a current output to the electromagnetic proportional control valve by repeating processing for temporarily lowering a current value of the current output to the electromagnetic proportional control valve and thereafter outputting to the electromagnetic proportional control valve, a current having a current value greater than the current value before lowering. The controller calibrates data for predicting an operation speed of the work implement based on a result of detection by the sensor at the time when the current value is increased stepwise.
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Patent Agency Ranking
公开(公告)号：US20180266082A1
公开(公告)日：2018-09-20
申请号：US15540077
申请日：2016-11-09
Applicant: KOMATSU LTD.
Inventor： Akira TANISHIGE , Yoshiki KAMI , Takashi YOKOO , Yuto FUJII , Haruki NISHIGUCHI
CPC classification number: E02F9/264 , E02F3/307 , E02F3/3677 , E02F3/434 , E02F9/2228 , E02F9/2271 , E02F9/2285 , E02F9/2296 , E02F9/267
Abstract: A main controller controlling an operation of a work vehicle includes a determination unit and an abnormal condition determination unit. The determination unit determines whether or not an attachment has a sensor based on information on an attachment. When the determination unit determines that the attachment has the sensor and when the abnormal condition determination unit cannot receive a signal from the sensor, the abnormal condition determination unit determines that an abnormal condition has occurred.
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公开(公告)号：US20180327997A1
公开(公告)日：2018-11-15
申请号：US15500272
申请日：2016-06-24
Applicant: KOMATSU LTD.
Inventor： Yuto FUJII , Takashi YOKOO
CPC classification number: E02F3/435 , E02F3/425 , E02F3/43 , E02F9/26 , E02F9/265 , F15B15/24 , F15B15/2861 , F15B19/002 , F15B2211/20546 , F15B2211/41536 , F15B2211/6336 , F15B2211/6346 , F15B2211/6651 , F15B2211/6652 , F15B2211/6654
Abstract: A work implement has a boom, an arm, and a bucket pivotable around a bucket axis which is a pivot axis with respect to the arm and a tilt axis orthogonal to the bucket axis. The hydraulic cylinder has the bucket pivot around the tilt axis. The regulation valve regulates an amount of supply of a hydraulic oil to be supplied to the hydraulic cylinder based on a command signal. The position sensor measures a stroke length of the hydraulic cylinder. The control unit resets the stroke length measured by the position sensor. The control unit determines proximity to a stroke end of the hydraulic cylinder, generates a command signal for increasing a degree of opening of the regulation valve in the proximity of the stroke end, and resets the stroke length measured by the position sensor while the regulation valve is open in response to the command signal.
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公开(公告)号：US20180251959A1
公开(公告)日：2018-09-06
申请号：US15561546
申请日：2016-11-09
Applicant: KOMATSU LTD.
Inventor： Yuto FUJII , Takashi YOKOO
CPC classification number: E02F9/2228 , E02F3/32 , E02F3/3677 , E02F9/20 , E02F9/2004 , E02F9/2267 , E02F9/2271 , E02F9/2285 , E02F9/2292 , E02F9/2296 , E02F9/26 , F15B11/04 , F15B11/16 , F15B2211/6316 , F15B2211/6336 , F15B2211/6346 , F15B2211/7107 , F15B2211/75 , F15B2211/855
Abstract: A work vehicle includes an operation apparatus for operating a work implement, a valve adjusting a flow rate of a hydraulic oil operating the work implement, an electromagnetic proportional control valve provided in a pilot oil path connecting a pilot oil pressure source and a pilot chamber of the valve to each other and generating a command pilot pressure with a source pressure input from the pilot oil pressure source being used as a primary pressure, and a main controller outputting a command current operating the electromagnetic proportional control valve in accordance with an operation of the operation apparatus. The main controller includes a data table storage unit storing data for predicting an operation speed of the work implement and a calibration unit calibrating data on the condition that an operation onto the operation apparatus is performed.
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公开(公告)号：US20170167116A1
公开(公告)日：2017-06-15
申请号：US15100720
申请日：2015-12-09
Applicant: KOMATSU LTD.
Inventor： Yuto FUJII , Tsutomu IWAMURA , Daiki ARIMATSU , Katsuhiro IKEGAMI , Masanobu SEKI
IPC: E02F9/26
CPC classification number: E02F9/264 , E02F3/32 , E02F3/3681 , E02F3/425 , E02F9/265
Abstract: A hydraulic excavator is provided with a tilt cylinder disposition data creating unit and a bucket information computing unit. The tilt cylinder disposition data creating unit creates tilt cylinder disposition data which indicates that a disposition of a tilt cylinder is either a first disposition in which a bucket is rotated in the clockwise direction due to extension or a second disposition in which the bucket is rotated in the clockwise direction due to contraction, when viewing the bucket from a vehicle body side. The bucket information computing unit obtains a tilt angle of the bucket based on the stroke length on the basis of the tilt cylinder disposition data.
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公开(公告)号：US20160069044A1
公开(公告)日：2016-03-10
申请号：US14423452
申请日：2014-09-10
Applicant: KOMATSU LTD.
Inventor： Takeshi TAKAURA , Yuto FUJII , Yoshiki KAMI
CPC classification number: E02F9/2012 , E02F3/437 , E02F9/2004 , E02F9/2029 , E02F9/2246 , E02F9/226 , E02F9/265
Abstract: A work vehicle includes a boom, an arm, a bucket, an arm cylinder, a direction control valve, a calculation portion, and a speed determination portion. The calculation portion calculates an estimated speed of the arm cylinder based on correlation between an amount of movement of the spool of the direction control valve in accordance with an amount of operation of an arm control lever and a speed of the arm cylinder. The speed determination portion determines a target speed of the boom based on the estimated speed of the arm cylinder. When the amount of operation of the arm control lever is smaller than a prescribed amount, the calculation portion calculates a speed higher than a speed of the arm cylinder in accordance with correlation as the estimated speed of the arm cylinder.
Abstract translation: 工作车辆包括吊杆，臂，铲斗，斗杆缸，方向控制阀，计算部分和速度确定部分。 计算部根据臂控制杆的动作量与斗杆缸的转速的关系，算出方向控制阀的阀芯的移动量之间的相关关系来计算斗杆缸的推定速度。 速度确定部分基于臂缸的估计速度来确定起重臂的目标速度。 当臂控制杆的操作量小于规定量时，计算部根据与手臂缸的推定速度的相关关系来计算高于手臂缸的速度的速度。
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