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1. 发明授权

US11118327B2 Work machine 有权
公开(公告)号：US11118327B2
公开(公告)日：2021-09-14
申请号：US17057414
申请日：2019-06-11
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Hiroyuki Kobayashi , Yoshiyuki Tsuchie , Hidekazu Moriki , Hiroshi Sakamoto
IPC分类号： E02F9/22 , F15B21/045 , F15B11/028 , F15B11/08
摘要： Provided is a work machine with which responsiveness of a hydraulic actuator can be improved when driving the hydraulic actuator through an electric lever-type operation device. A controller 100 further includes: an operation direction determining section 116 configured to determine operation directions of operation devices 2a and 2b; and a standby pressure switching command section 117 configured to output a standby pressure switching command to a first target pilot pressure correction section 112 or a second target pilot pressure correction section 113 which corresponds to a solenoid proportional valve that does not correspond to the operation direction from among first solenoid proportional valves 41a, 42a, 42b, 43a, 43b, and 44a and second solenoid proportional valves 41b, 42c, 42d, 43c, 43d, and 44b. The first target pilot pressure correction section and the second target pilot pressure correction section are configured to switch a first standby pressure α to a second standby pressure β set lower than the first standby pressure in a case in which the standby pressure switching command has been inputted.

2. 发明授权

US09452679B2 Operation management system 有权
标题翻译：运行管理系统
公开(公告)号：US09452679B2
公开(公告)日：2016-09-27
申请号：US14396513
申请日：2013-04-24
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Akira Kikuchi , Tomohiko Yasuda , Takayuki Sato , Hiroyuki Kobayashi , Shinjiro Saito
IPC分类号： B60L9/00 , B60K6/34 , B60L3/00 , B60L11/18 , B60K6/46 , B60L11/12 , B60L13/00 , B60W10/06 , B60W10/08 , B60W20/00 , B60L5/04 , H01B1/22 , H02J7/00 , B60M3/00
CPC分类号： B60L3/00 , B60K6/34 , B60K6/46 , B60L5/04 , B60L9/00 , B60L11/12 , B60L11/123 , B60L11/1842 , B60L13/00 , B60L2200/36 , B60L2260/26 , B60M3/00 , B60W10/06 , B60W10/08 , B60W20/00 , B60W20/12 , B60W2300/17 , B60W2550/40 , B60Y2400/212 , H01B1/22 , H02J7/00 , Y02E60/721 , Y02T10/6217 , Y02T10/6286 , Y02T10/7005 , Y02T10/7072 , Y02T10/7077 , Y02T90/121 , Y02T90/128 , Y02T90/14 , Y02T90/163 , Y04S10/126
摘要： An operation management system obviates such a situation that a power substation would trip and a supply of power to overhead wires would stop. The operation management system controls operation of electric drive vehicles, each of which is provided with a trolley mode, in which the electric drive vehicle runs by power supplied to the overhead wires, and a diesel mode, in which the electric drive vehicle runs by an output from an engine. A supply margin detection unit detects a current supply margin of power and a running position detecting unit detects a current running position of the electric drive vehicle. A running mode detection unit detects a current running mode of the electric drive vehicle and a running mode determination unit determines a next running mode based on the detection results of the supply margin detection unit, running position detecting unit, and running mode detection unit.
摘要翻译：操作管理系统避免了变电站跳闸的情况，架空线的电力供应停止。操作管理系统控制电动车辆的操作，每个电动车辆具有手推车模式，电动驾驶车辆通过供应到架空线的动力运行，以及柴油模式，其中电动驾驶车辆由从发动机输出。供电余量检测单元检测电力的当前供给余量，并且运行位置检测单元检测电动车辆的当前行驶位置。运行模式检测单元检测电动车辆的当前行驶模式，并且行驶模式确定单元基于供给余量检测单元，行驶位置检测单元和行驶模式检测单元的检测结果来确定下一行驶模式。

3. 发明授权

US09315116B2 Electric drive vehicle 有权
标题翻译：电动车
公开(公告)号：US09315116B2
公开(公告)日：2016-04-19
申请号：US14395573
申请日：2013-04-11
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Hiroyuki Kobayashi , Akira Kikuchi , Tomohiko Yasuda , Takayuki Sato , Shinjiro Saito
IPC分类号： B60L9/00 , G06F7/70 , B60L15/20 , B60L3/10
CPC分类号： B60L15/2072 , B60L3/106 , B60L15/20 , B60L15/2009 , B60L2200/36 , B60L2220/46 , B60L2240/421 , B60L2240/423 , B60L2240/461 , B60L2240/465 , B60L2260/28 , B60L2270/145 , Y02T10/645 , Y02T10/646 , Y02T10/7275
摘要： Provided is an electric drive vehicle which can control wheel speed so as to achieve an appropriate slip ratio of the wheels even when pitching vibration of the vehicle is large. This electric drive vehicle is provided with electric motors (1, 4), drive wheels (3, 6), driven wheels (7, 8), an electric motor controller (50) for controlling the electric motors, and speed detectors (9-12) for detecting the wheel speed of the drive wheels and the driven wheels. The electric motor controller is provided with: a slip ratio calculation unit (21) which calculates the slip ratio of the drive wheels from the wheel speed detected values detected by the speed detectors; a torque command calculation unit (20) which calculates torque commands for the drive wheels; a drive force calculation unit (19) which, from the wheel speed detected values of the drive wheels and the torque commands of the drive wheels, calculates the drive force generated in the drive wheels; and filters (54, 55) which reduce the pitching vibration frequency components of the vehicle included in the slip ratio and the drive force.
摘要翻译：提供了一种能够控制车轮速度以便即使当车辆的俯仰振动较大时车轮的适当滑移率的电动车辆。该电动车辆设置有电动机（1,4），驱动轮（3,6），从动轮（7,8），用于控制电动机的电动机控制器（50）和速度检测器（9- 12），用于检测驱动轮和从动轮的车轮速度。电动机控制装置具备：滑差比计算部（21），根据由速度检测器检测出的车轮速度检测值来计算驱动轮的滑移率; 扭矩指令计算单元（20），其计算用于所述驱动轮的扭矩指令; 驱动力计算单元，根据驱动轮的车轮速度检测值和驱动轮的转矩指令，计算在驱动轮中产生的驱动力; 以及减小包含在滑移率中的车辆的俯仰振动频率分量和驱动力的过滤器（54,55）。

4. 发明授权

US10920394B2 Construction machine 有权
公开(公告)号：US10920394B2
公开(公告)日：2021-02-16
申请号：US16082552
申请日：2017-09-20
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Hiroyuki Kobayashi , Hiroshi Sakamoto , Yoshiyuki Tsuchie
IPC分类号： E02F9/22 , E02F9/20 , E02F3/43
摘要： Lever neutrality is determined by whether or not operation levers are at a neutral position based on operation signals from operation levers. Pilot pressures are computed based on the operation signals from the operation levers; and pilot pressure signals are converted to current signals. A current interruption controller controls interruption and communication of the current signals to the solenoid proportional valves; and an operating condition is determined by determining whether a construction machine is in a manual operation state or a semiautomatic operation state. At least one hydraulic actuator is controlled to assist the operation of the operator, and when it is determined that the construction machine is in the semiautomatic operation state, the current interruption controller interrupts the current signals to all of the solenoid proportional valves only when it is determined that all the operation levers are at the neutral position.

5. 发明授权

US10450725B2 Construction machine 有权
公开(公告)号：US10450725B2
公开(公告)日：2019-10-22
申请号：US15768841
申请日：2016-12-05
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Hiroyuki Kobayashi , Hiroshi Sakamoto , Yasutaka Tsuruga
IPC分类号： E02F9/22 , E02F9/20 , F15B11/04 , F15B11/08
摘要： A construction machine that can ensure an initial response that varies in accordance with a hydraulic actuator in a similar fashion to a case of adopting a hydraulic pilot-type operation device is provided. A controller 100 of a hydraulic excavator outputs a command current for driving the corresponding solenoid proportional valve (i.e. some of solenoid proportional valves 41a, 41b, 42a to 42d, 43a to 43d, 44a and 44b) in response to an operation signal from an electric lever-type work operation device 2a or 2b, and includes a correction function to correct the command current such that the command current is higher than a target current corresponding to an operation amount of the operation device for preset predetermined time at a time of starting to operate the operation device from a neutral position thereof. This correction function corrects only the command current to the bucket solenoid proportional valves 44a and 44b.

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