专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US11377822B2 Hydraulic drive apparatus 有权
公开(公告)号：US11377822B2
公开(公告)日：2022-07-05
申请号：US16330407
申请日：2017-09-08
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Kiwamu Takahashi , Kouji Ishikawa , Yasutaka Tsuruga , Masatoshi Hoshino , Seiji Hijikata
IPC分类号： E02F9/22
摘要： A first torque control proportional electromagnetic valve (37) is connected through a first torque control line (41) to a third pressure receiving chamber (32D) in a first torque control regulator (32). A second torque control proportional electromagnetic valve (38) is connected through a second torque control line (42) to a third pressure receiving chamber (35D) in a second torque control regulator (35). The first and second torque control proportional electromagnetic valves (37, 38) are controlled by a controller 47. A switching valve (48) is provided between the first torque control line (41) and the second torque control line (42). The switching valve (48) supplies an output pressure of the first torque control proportional electromagnetic valve (37) to the third pressure receiving chamber (35D) in the second torque control regulator (35) at the time of driving hydraulic motors (2B, 2C) for left side and right side traveling.

2. 发明授权

US10794044B2 Work machine hydraulic control system 有权
公开(公告)号：US10794044B2
公开(公告)日：2020-10-06
申请号：US16082748
申请日：2017-03-27
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Yuichi Ogawa , Seiji Hijikata , Masatoshi Hoshino
IPC分类号： E02F9/22 , F15B1/02 , F15B11/08 , F15B21/14
摘要： Provided is a work machine hydraulic control system capable of detecting abnormality in a pump output power switching device independently of the abnormality state of the pump output power switching device. A hydraulic control system of a hydraulic excavator is equipped with an accumulator 21 connected to a hydraulic line 25A between a pilot pump 17 and a pilot valve 20, an unloading valve 27 that is a pump output power switching device, a pressure sensor 29 detecting the pressure of the hydraulic fluid supplied to the pilot valve 20, and a controller 30 having a pump output power control section 31 switching the unloading valve 27 in accordance with the pressure detected by the pressure sensor 29. The controller 30 further has an abnormality determination section 32 that computes a command continuation time in a state in which a command output to the unloading valve 27 is not changed. In the case where this command continuation time is not less than a predetermined value, it determines that the unloading valve 27 is abnormal, and outputs the determination result.

3. 发明授权

US10480442B2 Working machine and working machine monitoring system 有权
公开(公告)号：US10480442B2
公开(公告)日：2019-11-19
申请号：US16218597
申请日：2018-12-13
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Shinya Sato , Masatoshi Hoshino , Kouji Ishikawa , Shinji Ishihara
IPC分类号： F02D41/22 , F02D41/00 , F02D41/04 , F02D41/26 , F02D29/04 , F02D29/02 , G07C5/00 , G07C5/08 , E02F9/26 , E02F9/20 , E02F3/32
摘要： An object of the present invention is to provide a working machine and a working machine monitoring system using the same which is capable of improving the accuracy in determining fuel property. The working machine is provided with an engine operation parameter acquisition module (1041) that acquires an engine operation parameter representing the operation state of an engine mounted on the working machine; a refueling time acquisition module (1011) that acquires a refueling time when the working machine is supplied with fuel; and a fuel property determination module (1014) that determines the property of the fuel based on a comparison result of the time when the engine operation parameter changes, with the refueling time.

4. 发明授权

US09816252B2 Hydraulic work machine 有权
公开(公告)号：US09816252B2
公开(公告)日：2017-11-14
申请号：US14411246
申请日：2013-05-10
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Masatoshi Hoshino , Shinji Ishihara , Kazuo Fujishima
IPC分类号： E02F9/20 , F02D29/02 , F02D29/04 , E02F9/22 , B60K6/485 , B60W10/06 , B60W10/08 , B60W10/30 , B60W20/00
CPC分类号： E02F9/2075 , B60K6/485 , B60W10/06 , B60W10/08 , B60W10/30 , B60W20/00 , B60W2300/17 , E02F9/2246 , E02F9/2296 , F02D29/02 , F02D29/04 , Y02T10/6226 , Y02T10/6286
摘要： This invention is a hydraulic work machine having an electric assist motor coupled to an engine and a hydraulic pump, in the hydraulic work machine of which, a rotational speed and torque of the engine are controlled so that an operating point of the engine moves along a predetermined route for yielding a combustion state of the engine under a transient state that the engine changes in speed and torque. A target speed and torque of the engine 7 are set so that the rotational speed and torque of the engine 7 will change along a predetermined route F in a running region of the engine, respective rates of change of the target rotational speed and torque of the engine 7 are limited, and the engine 7 is controlled to yield the target engine speed. In addition, torque of the assist motor 10 is controlled to yield the target torque of the engine.

5. 发明授权

US09671763B2 Device for controlling construction machinery 有权
公开(公告)号：US09671763B2
公开(公告)日：2017-06-06
申请号：US14370127
申请日：2012-12-28
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Shinji Ishihara , Masatoshi Hoshino , Mitsuo Sonoda
IPC分类号： G05B11/01 , B60K6/485 , B60W10/06 , B60W20/00 , F04B49/06 , B60W10/30 , B60W30/188 , G05B15/02 , F02D29/04 , F02D29/06
CPC分类号： G05B11/01 , B60K6/485 , B60W10/06 , B60W10/30 , B60W20/00 , B60W30/1882 , F02D29/04 , F02D29/06 , F04B49/06 , G05B15/02 , Y02T10/6226
摘要： In a control device for construction machinery, a system operating point calculation unit calculates a plurality of combinations of engine rotational speed and engine torque with which demanded power of an engine can be generated; and calculates system efficiency in each of the combinations according to discharge pressure of a hydraulic. A rotational speed calculation unit calculates target rotational speed of the engine as the engine rotational speed in one of the combinations of the engine rotational speed, the engine torque and the system efficiency calculated by the system operating point calculation unit that includes desired system efficiency. A displacement calculation unit calculates target displacement of the hydraulic pump based on the target rotational speed calculated by the rotational speed calculation unit and demanded flow rate of the hydraulic pump. With this control device, the engine and the hydraulic pump can be controlled at an efficient operating point.

6. 发明授权

US09187294B2 Hybrid construction machine and method for controlling the same 有权
标题翻译：混合式施工机及其控制方法
公开(公告)号：US09187294B2
公开(公告)日：2015-11-17
申请号：US14351406
申请日：2012-10-12
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Hiroshi Sakamoto , Masatoshi Hoshino , Shinji Ishihara
IPC分类号： B66C13/18 , E02F9/12 , E02F9/20 , B60K6/46 , B60K6/485 , B66C23/84
CPC分类号： B66C13/18 , B60K6/46 , B60K6/485 , B66C23/84 , E02F9/123 , E02F9/20 , E02F9/2075 , E02F9/2091 , E02F9/2095 , Y02T10/6217 , Y02T10/6226
摘要： Provided is a hybrid construction machine together with a method for controlling that construction machine in a manner ensuring the operability of its combined operations regardless of fluctuations in the load on its work machine.The hybrid construction machine has: a swing structure; a work machine attached to the swing structure; an engine mounted on the swing structure; a first electric motor driven by the engine, the motor being capable of generating power; a hydraulic pump driven by the engine and the first electric motor; a second electric motor for driving the swing structure; and a plurality of electric storage devices, wherein the hybrid construction machine further includes a first control unit which, in a combined operation involving the work machine and the swing structure, drives and controls the second electric motor by use of the electric power supplied from at least one electric storage device selected from the storage devices and from another electric storage device offering a higher output level and a lower stored energy level per unit weight than the selected at least one electric storage device, and drives and controls the hydraulic pump by use of the engine.
摘要翻译：提供了一种混合式施工机器以及用于以确保其组合操作的可操作性的方式控制该建筑机器的方法，而不管其作业机器上的负载的波动如何。混合动力施工机械有：摆动结构; 连接到摆动结构的作业机器; 安装在摆动结构上的发动机; 由发动机驱动的第一电动马达，能够发电; 由发动机和第一电动机驱动的液压泵; 用于驱动所述摆动结构的第二电动机; 以及多个蓄电装置，其中，所述混合动力施工机械还包括第一控制单元，所述第一控制单元在涉及所述作业机械和所述摆动结构的组合操作中，通过使用从其提供的电力来驱动和控制所述第二电动机从所述存储装置中选择的至少一个蓄电装置以及从所选择的至少一个蓄电装置提供更高输出水平和每单位重量的较低存储能量水平的另一蓄电装置，并且通过使用所述至少一个蓄电装置来驱动和控制所述液压泵引擎。

7. 发明申请

US20150047916A1 ELECTRICALLY DRIVEN WORKING VEHICLE 有权
标题翻译：电动车辆
公开(公告)号：US20150047916A1
公开(公告)日：2015-02-19
申请号：US14377566
申请日：2013-02-13
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Hidekazu Moriki , Satoru Kaneko , Masatoshi Hoshino , Takashi Ikimi , Noritaka Ito
IPC分类号： E02F9/20 , B60W20/00 , B60K6/46
CPC分类号： E02F9/2075 , B60K6/46 , B60K6/52 , B60L7/14 , B60L7/18 , B60L11/005 , B60L11/123 , B60L11/126 , B60L11/14 , B60L15/20 , B60L15/2009 , B60L2200/40 , B60L2200/42 , B60L2210/30 , B60L2210/40 , B60L2240/421 , B60L2240/423 , B60L2240/526 , B60L2240/527 , B60L2240/529 , B60L2240/547 , B60L2250/26 , B60W10/06 , B60W10/08 , B60W20/00 , B60W30/18045 , B60W2300/17 , B60W2510/244 , E02F9/207 , E02F9/2079 , E02F9/2083 , E02F9/2091 , E02F9/2095 , E02F9/2296 , Y02T10/6217 , Y02T10/6265 , Y02T10/6286 , Y02T10/642 , Y02T10/645 , Y02T10/7022 , Y02T10/7077 , Y02T10/7241 , Y02T10/7275 , Y02T10/92 , Y10S903/903
摘要： There is provided an electrically driven working vehicle that needs reduced assisting power from an electrical storage device when accelerating subsequent to modulation and still obtains acceleration at least equivalent to that of torque converter vehicles.The electrically driven working vehicle has an engine 1, a generator motor 5 connected mechanically to the engine 1, a generator inverter 6 for controlling the amount of power generated by the generator motor 5, a traveling motor 7 for driving a vehicle body, an electrical storage device 3 connected electrically to the generator inverter 6 and to the traveling motor 7, and a forward/reverse switching device 103 for switching the traveling direction of the vehicle body. The vehicle includes a control device 100 for outputting to the generator inverter 6 an instruction to increase the amount of power generated by the generator motor 5 when the voltage of the electrical storage device 3 is equal to or lower than a maximum voltage level and a speed signal of the traveling motor 7 given upon switching of the forward/reverse switching device 103 is equal to or lower than a predetermined speed.
摘要翻译：提供了一种电动作业车辆，其在调制后加速时需要减少来自蓄电装置的辅助动力，并且还获得至少与变矩器车辆相当的加速度。电动作业车辆具有发动机1，与发动机1机械连接的发电电动机5，用于控制发电电动机5产生的动力量的发电机逆变器6，车体驱动用行驶电动机7，与发电机逆变器6和行驶电动机7电连接的蓄电装置3，以及用于切换车身行驶方向的前后倒转开关装置103。车辆包括控制装置100，用于当蓄电装置3的电压等于或低于最大电压电平和速度时，向发电机逆变器6输出增加发电电动机5产生的电力量的指令正向/反向切换装置103切换时给出的行进马达7的信号等于或低于预定速度。

8. 发明授权

US11149753B2 Hydraulic energy recovery apparatus for working machine 有权
公开(公告)号：US11149753B2
公开(公告)日：2021-10-19
申请号：US16492368
申请日：2018-05-18
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Kiwamu Takahashi , Seiji Hijikata , Masatoshi Hoshino , Yuichi Ogawa , Kouji Ishikawa
IPC分类号： F15B1/08 , E02F9/22 , F15B21/14
摘要： A controller (45) is provided with an elapse time measuring section (47A) that measures an elapse time (tx) elapsed since an initial use of an accumulator (29) based upon a reset signal from a reset switch (44), a number-of-operations measuring section (47B) that measures a number of operations of the accumulator (29), that is, a number (N) of boom lowering operations after a reset, based upon a detection signal from an accumulator side pressure sensor (39), a gas permeation amount estimating section (47C) that estimates an estimation gas permeation amount (Qloss) of the accumulator (29), a sealed gas pressure estimating section (47D) that finds an estimation sealed gas pressure (Pgs) of a gas chamber (29B) of the accumulator (29), and an accumulator degradation determining section (47E) that determines a degradation condition of the accumulator (29) and outputs the determination result.

9. 发明授权

US10329739B2 Construction machine 有权
公开(公告)号：US10329739B2
公开(公告)日：2019-06-25
申请号：US15555685
申请日：2016-03-11
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Masatoshi Hoshino , Yasutaka Tsuruga , Kiwamu Takahashi , Seiji Hijikata
IPC分类号： F16D31/02 , E02F9/22 , F16H61/475 , F15B11/16 , F15B11/00 , F15B11/10 , E02F3/32
摘要： The invention provides a construction machine in which the load torque at the time of engine start-up can be reduced even when the engine stops against the will of the operator. A hydraulic excavator includes a control device (35) having a pump displacement control section (37) and an unload control section (38). The pump displacement control section (37) makes the displacement of a hydraulic pump (16) variable to a minimum displacement by controlling a regulator device (20) when the speed of an engine (14) detected by a speed sensor (41) becomes equal to or less than a preset low speed N3 at the time of driving of the engine (14). The unload control section (40) controls an unloading valve (24) to the open position at the time of start-up of the engine (14).

10. 发明授权

US09574327B2 Hybrid construction machinery 有权
标题翻译：混合动力施工机械
公开(公告)号：US09574327B2
公开(公告)日：2017-02-21
申请号：US14916508
申请日：2014-11-13
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Shinji Ishihara , Masatoshi Hoshino
IPC分类号： E02F9/20 , B60K6/485 , B60L11/02 , B60W10/06 , B60W10/08 , B60W20/00 , E02F9/22 , B60L1/00 , B60L11/18 , B60L15/20 , E02F3/32
CPC分类号： E02F9/2075 , B60K6/48 , B60K6/485 , B60L1/003 , B60L11/02 , B60L11/1862 , B60L15/2045 , B60L2200/40 , B60L2240/36 , B60L2240/421 , B60L2240/423 , B60L2240/443 , B60L2240/545 , B60L2240/662 , B60W10/06 , B60W10/08 , B60W10/30 , B60W20/00 , B60W20/11 , B60W30/1882 , B60W2300/17 , B60W2710/0677 , B60W2710/081 , E02F3/32 , E02F9/2232 , E02F9/2296 , Y02T10/56 , Y02T10/6221 , Y02T10/6226 , Y02T10/6286 , Y02T10/645 , Y02T10/70 , Y02T10/7005 , Y02T10/7044 , Y02T10/705 , Y02T10/7077 , Y02T10/72 , Y02T10/7283 , Y02T10/7291 , Y02T10/84 , Y02T90/16 , Y02T90/34 , Y10S903/903
摘要： The purpose of the present invention is to operate an engine in a proper operation state while keeping the remaining amount in an electrical storage apparatus within a proper range. Hybrid construction machinery according to the present invention is provided with a controller for controlling an engine according to a governor characteristic having a predetermined inclination that defines a relationship between load torque and rotational speed so that the rotational speed decreases with an increase in the load torque. In the controller, a target engine power calculating unit (2-5) calculates a first target engine power that increases and decreases according to increases and decreases in output values of a load power calculating unit (2-1) and a charge/discharge request calculating unit (2-3), and a target rotational speed calculating unit (2-6) calculates, as a command value for a target rotational speed of a motor generator, a rotational speed at the intersection point of a governor characteristic line changed by a governor characteristic changing unit (2-4) and an equal power line dependent on the first target engine power on a rotating speed-torque characteristic line diagram.
摘要翻译：本发明的目的在于使发动机在适当的操作状态下操作，同时将电量存储装置中的剩余量保持在适当的范围内。根据本发明的混合动力施工机械设置有控制器，用于根据具有预定倾角的调速器特性来控制发动机，所述预定倾角限定了负载转矩和转速之间的关系，使得转速随着负载转矩的增加而降低。在控制器中，目标发动机功率计算单元（2-5）根据负载功率计算单元（2-1）和充电/放电请求的输出值的增减来计算增减的第一目标发动机功率计算单元（2-3），目标转速计算单元（2-6）计算作为电动发电机的目标转速的指令值，将调速器特性线的交点改变的转速调速器特性改变单元（2-4）以及取决于转速 - 转矩特性线图上的第一目标发动机功率的等电力线。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式