公开(公告)号：US20240360650A1

公开(公告)日：2024-10-31

申请号：US18689481

申请日：2022-12-13

申请人： Hitachi Construction Machinery Tierra Co., Ltd.

发明人： Kazushige MORI ,  Kiwamu TAKAHASHI ,  Ryoya INOUE ,  Yuki KOTO

IPC分类号： E02F9/20

CPC分类号： E02F9/2095 ,  E02F9/207 ,  E02F9/2091

摘要： In an electrically driven construction machine, decrease in the remaining electric power storage amount of an electric power storage device is reduced when a transition to auto idle control takes place in case where the remaining electric power storage amount is small, and the duration over which the remaining electric power storage amount of the electric power storage device lasts is lengthened. Accordingly, a controller 31 controls the rotation speed of an electric motor 1 such that the rotation speed of the electric motor 1 is lowered from a predetermined rotation speed to an idle rotation speed Ni when none of a plurality of operation devices 20, 21, 22, 23a, 23b, and 24 is manipulated and a predetermined time duration TD has elapsed. In addition, when the remaining electric power storage amount of an electric power storage device 33 is equal to or smaller than a first threshold Ea, the controller 31 sets the predetermined time duration TD shorter than when the remaining electric power storage amount is greater than the first threshold Ea.

公开(公告)号：US20240360649A1

公开(公告)日：2024-10-31

申请号：US18648100

申请日：2024-04-26

申请人： Yanmar Holdings Co., Ltd.

发明人： Hiroki Kabata ,  Katsuya Miyazaki ,  Kazuki Takeda ,  Daisuke Kawaguchi

IPC分类号： E02F9/20 ,  E02F9/08 ,  E02F9/22 ,  F01N9/00 ,  F15B15/20

CPC分类号： E02F9/2095 ,  E02F9/0866 ,  E02F9/2066 ,  E02F9/2235 ,  F01N9/002 ,  F15B15/20 ,  E02F9/2285 ,  E02F9/2296

摘要： A control method of a work machine in which a rotation number of a fan that takes outside air into an engine room accommodating an engine varies with a rotation number of the engine, includes: executing first control of regenerating a collecting filter unit that collects particulates contained in exhaust gas of the engine by a temperature rise of the exhaust gas; when the work machine is changed from a steady state to a specific state, executing second control of decreasing an amount of working oil discharged from a hydraulic pump by driving of the engine; and, when the first control and the second control are concurrently executed, executing third control of increasing the rotation number of the engine.

公开(公告)号：US20240271391A1

公开(公告)日：2024-08-15

申请号：US18108436

申请日：2023-02-10

申请人： Caterpillar Global Mining Equipment LLC

发明人： Charles Taylor Hudson ,  John Francis Halterman

IPC分类号： E02F9/22 ,  E02F9/20 ,  H02G11/02

CPC分类号： E02F9/2246 ,  B60K25/00 ,  E02F9/2025 ,  E02F9/2095 ,  E02F9/2264 ,  E21B7/02 ,  E21B7/022 ,  H02G11/02

摘要： An auxiliary motivation system for a work machine may be provided where the work machine has a power source for powering a hydraulic system to hydraulically power a hydraulic motor of a drive system of the work machine. The auxiliary motivation system may include an auxiliary motivation device that includes an auxiliary power source and an auxiliary hydraulic system powered by the auxiliary power source. The auxiliary hydraulic system may be configured for fluid coupling to the hydraulic motor of the drive system of the work machine to drive the work machine in place of the hydraulic system on the work machine.

公开(公告)号：US11718975B2

公开(公告)日：2023-08-08

申请号：US16592530

申请日：2019-10-03

申请人： DEERE & COMPANY

发明人： David A Veasy

IPC分类号： E02F3/84 ,  E02F9/20 ,  E02F3/815 ,  B62D53/04

CPC分类号： E02F3/84 ,  B62D53/045 ,  E02F3/8155 ,  E02F3/847 ,  E02F9/2095

摘要： A work vehicle comprising a material management system using moldboard gates. A sensor is configured to generate a signal indicative of a ground feature and a location of the ground feature. A moldboard is coupled to the work vehicle and is configured to move a ground material. A gate is coupled to the moldboard and a gate actuator is coupled to the gate. The gate actuator is configured to move the gate to an open position, a closed position, or to a position in between. A controller which is in communication with the sensor is configured to receive the signal indicative of the ground feature and the location and control the gate actuator to move the gate based on the ground feature and the location.

公开(公告)号：US20230228059A1

公开(公告)日：2023-07-20

申请号：US17928924

申请日：2021-05-10

申请人： Yanmar Holdings Co., Ltd.

发明人： Shu NISHIKORI ,  Kensuke KANEDA

IPC分类号： E02F9/20 ,  F15B15/18 ,  E02F9/22 ,  F15B13/04 ,  E02F9/08 ,  B60K11/04

CPC分类号： E02F9/2095 ,  F15B15/18 ,  E02F9/226 ,  F15B13/04 ,  E02F9/0866 ,  B60K11/04 ,  B60L2200/40 ,  F15B2211/62 ,  B60L2260/40

摘要： An electric construction machine includes a driving system configured to drive a machine body under electric power, a heat exchange device configured to exchange heat of a cooling medium for cooling the driving system, a cooling fan configured to send air for cooling the heat exchange device, and a cooling fan control unit configured to control the rotation of the cooling fan according to a set operating mode. The operating mode includes a driving mode in which the driving system is driven and a charging mode in which the driving of the driving system is stopped to charge a battery configured to store electric power. The cooling fan control unit is configured to set the rotation rate of the cooling fan in the charging mode to a charging mode rotation rate that corresponds to the driving state of the driving system.

公开(公告)号：US20190093316A1

公开(公告)日：2019-03-28

申请号：US15743876

申请日：2017-09-27

申请人： Komatsu Ltd.

发明人： Taiichiro Hayashibe

IPC分类号： E02F9/20 ,  B60Q1/00

CPC分类号： E02F9/2095 ,  B60K6/08 ,  B60Q1/0076 ,  B60R16/02 ,  B60R16/03 ,  E02F3/34 ,  E02F3/434 ,  E02F9/2004 ,  E02F9/2012 ,  E02F9/2058 ,  F16H61/4017 ,  F16H61/431 ,  F16H61/433 ,  H02J7/00 ,  H02J7/1423

摘要： A work vehicle collective switch apparatus includes: a switch operation unit including a plurality of switches; a network side signal output unit that outputs a switch state signal to an in-vehicle network side connected to the collective switch apparatus; a drive signal output unit that outputs a drive signal to a direct-coupled device connected to the collective switch apparatus, and a control unit that outputs a command signal corresponding to switch operation on a basis of switch assignment information that assigns in advance as to whether the drive signal is to be output from the drive signal output unit or the switch state signal is to be output from the network side signal output unit in accordance with switch operation of any of the plurality of switches

公开(公告)号：US20180313060A1

公开(公告)日：2018-11-01

申请号：US15499978

申请日：2017-04-28

申请人： Caterpillar Global Mining LLC

发明人： Peter James Miller ,  Arthur Milkowski

IPC分类号： E02F9/20 ,  E02F9/08

CPC分类号： E02F9/2091 ,  E02F3/32 ,  E02F9/2075 ,  E02F9/2095 ,  E02F9/2246

摘要： An energy storage system associated with a machine having a work tool and one or more auxiliary loads includes a power source which generates mechanical power. An energy storage device supplies power to the one or more auxiliary loads. An electrical generator is operably coupled to the power source and converts at least a portion of the mechanical power into electrical power. The electrical generator supplies the electrical power to the energy storage device. A controller is communicably coupled to the power source, the work tool, the energy storage device, and the electrical generator. The controller determines a power demand of the work tool. The controller then compares whether the determined power demand exceeds a pre-determined threshold power. The controller disables the electrical generator from supplying the electrical power to the energy storage device if the power demand exceeds the pre-determined threshold power.

公开(公告)号：US20180238018A1

公开(公告)日：2018-08-23

申请号：US15555705

申请日：2016-03-11

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： Shinji ISHIHARA ,  Masafumi HITA ,  Shinya IMURA

IPC分类号： E02F3/43 ,  E02F9/12 ,  E02F9/22 ,  E02F9/20 ,  F15B11/16

CPC分类号： E02F3/435 ,  B60Y2200/412 ,  E02F3/32 ,  E02F3/437 ,  E02F9/123 ,  E02F9/2037 ,  E02F9/2075 ,  E02F9/2095 ,  E02F9/22 ,  E02F9/2246 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/16 ,  F15B2211/20515 ,  F15B2211/20523 ,  F15B2211/20576 ,  F15B2211/6336 ,  F15B2211/6651 ,  F15B2211/6655 ,  F15B2211/7051 ,  F15B2211/7058 ,  F15B2211/7135 ,  F15B2211/7142 ,  F15B2211/782 ,  Y10S903/903

摘要： A control system for a construction machine maintains operability of a swing combined operation even when the power supplied from an engine or storage device varies. The control system includes a target path computation section that receives an operation amount of the front implement operation device, an operation amount of the swing operation device, a speed of the front implement drive unit detected, and an angular speed of the swing structure drive unit, and that computes a target path of a claw tip position of the front implement drive unit; and an actuator power computation section that regulates power supplied to the front implement drive unit or the swing structure drive unit in such a manner that a claw tip of the front implement drive unit follows the target path the front implement operation device and the swing operation device are operated simultaneously.

公开(公告)号：US10017917B2

公开(公告)日：2018-07-10

申请号：US14916368

申请日：2015-10-28

申请人： Komatsu Ltd.

发明人： Tadashi Kawaguchi ,  Teruo Akiyama ,  Koji Saito ,  Takayuki Watanabe ,  Noboru Iida

IPC分类号： F16D31/02 ,  E02F9/22 ,  F15B11/16 ,  E02F3/32 ,  E02F9/12 ,  F15B11/08 ,  F15B13/04 ,  F15B21/08 ,  E02F3/43 ,  E02F9/20 ,  F15B11/17

CPC分类号： E02F9/22 ,  E02F3/32 ,  E02F3/435 ,  E02F9/123 ,  E02F9/2095 ,  E02F9/2217 ,  E02F9/2228 ,  E02F9/2242 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/08 ,  F15B11/163 ,  F15B11/17 ,  F15B13/0401 ,  F15B21/08 ,  F15B2211/20523 ,  F15B2211/20576 ,  F15B2211/30595 ,  F15B2211/35 ,  F15B2211/7135 ,  F15B2211/7142

摘要： A drive device of a construction machine includes a pump passage connected to a hydraulic pump, first and second supply passages connected to the pump passage, first and second passages connected to the first supply passage, third and fourth passages connected to the second supply passage, a first valve connected to the first and third passages, a second valve connected to the second and fourth passages, a first bucket passage connecting the first passage to a cap-side space of the bucket cylinder through the first valve, a second bucket passage connecting the third passage to a rod-side space of the bucket cylinder through the first valve, a first arm passage connecting the second passage to a rod-side space of an arm cylinder through the second valve, and a second arm passage connecting the fourth passage to a cap-side space of the arm cylinder through the second valve.

公开(公告)号：US20180044890A1

公开(公告)日：2018-02-15

申请号：US15554601

申请日：2016-02-23

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： Seiji HIJIKATA ,  Kouji ISHIKAWA ,  Shinya IMURA

IPC分类号： E02F9/22 ,  F15B11/024 ,  F15B21/14 ,  E02F9/20

CPC分类号： E02F9/2217 ,  B60Y2200/412 ,  E02F9/2095 ,  E02F9/2225 ,  E02F9/2235 ,  E02F9/2271 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  E02F9/268 ,  F15B11/024 ,  F15B11/17 ,  F15B21/14 ,  F15B2211/20576 ,  F15B2211/3059 ,  F15B2211/30595 ,  F15B2211/3157 ,  F15B2211/353 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/7142 ,  F15B2211/88

摘要： A hydraulic fluid energy regeneration system for a work machine capable of securely maintaining a brake pressure even when a solenoid valve or the like is erroneously rendered open by an electrical failure is provided. The hydraulic fluid energy regeneration system for a work machine, including a first hydraulic actuator; a second hydraulic actuator; and a first hydraulic pump that supplies a hydraulic fluid to the first hydraulic actuator via a first hydraulic line, includes: an upper control valve that is connected to a discharge side on which the hydraulic fluid is discharged from the second hydraulic actuator when an object to be driven by the second hydraulic actuator falls under its own weight, and that can regulate a flow rate of the hydraulic fluid discharged from the second hydraulic actuator; a communication hydraulic line that connects the upper control valve to a hydraulic fluid tank; a lower control valve that is provided in the communication hydraulic line and that can regulate a flow rate of the hydraulic fluid discharged from the upper control valve to the hydraulic fluid tank; and a regeneration hydraulic line that has one end side connected to a branch section between the upper control valve and the lower control valve in the communication hydraulic line and that has an other end side connected to the first hydraulic line.