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1. 发明公开

EP3203087A4 WORK VEHICLE HYDRAULIC DRIVE SYSTEM 有权
公开(公告)号：EP3203087A4
公开(公告)日：2018-06-27
申请号：EP14902957
申请日：2014-10-02
申请人： HITACHI CONSTRUCTION MACH CO
发明人： HIJIKATA SEIJI , ISHIKAWA KOUJI , OOKI TAKATOSHI , IMURA SHINYA
IPC分类号： F15B21/14 , E02F9/22
CPC分类号： E02F3/425 , E02F3/32 , E02F9/22 , E02F9/2217 , E02F9/2225 , E02F9/2271 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/16 , F15B21/14 , F15B2211/20546 , F15B2211/46 , F15B2211/6313 , F15B2211/6326 , F15B2211/6336 , F15B2211/6346 , F15B2211/7053 , F15B2211/71 , F15B2211/88
摘要： When hydraulic fluid discharged from a hydraulic actuator is to be recovered for driving a different hydraulic actuator, the recovery frequency is increased to achieve further energy saving. To this end, a pressure increasing circuit 36 is provided in which a communication pressure increasing valve 12 is disposed in a communication passage 26 that connects a bottom side line 23 of and a rod side line 24 a boom cylinder 4. A recovery control valve 11 is controlled such that, when a first operation unit 5 is operated in a boom lowering direction (own weight falling direction of the boom) and a second operation unit 6 is operated simultaneously, only if the pressure at the bottom side of the boom cylinder 4 is higher than the pressure at the arm cylinder side that is a recovery destination of hydraulic fluid, the recovery control valve 11 is opened to recover the flow rate discharged from the bottom side of the boom cylinder 4 to the arm cylinder side.

2. 发明公开

EP3193024A4 HYDRAULIC CONTROL DEVICE FOR WORK MACHINE 有权
公开(公告)号：EP3193024A4
公开(公告)日：2018-05-02
申请号：EP15839308
申请日：2015-04-14
申请人： HITACHI CONSTRUCTION MACH CO
发明人： MORIKI HIDEKAZU , IMURA SHINYA , ISHIKAWA KOUJI , YAMASHITA RYOHEI
IPC分类号： F15B11/00 , E02F3/42 , E02F9/22 , F15B11/02 , F15B11/17
CPC分类号： E02F3/422 , E02F3/425 , E02F9/2221 , E02F9/2235 , E02F9/2242 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B13/06 , F15B2211/20576 , F15B2211/255 , F15B2211/265 , F15B2211/3059 , F15B2211/30595 , F15B2211/6652 , F15B2211/6654 , F15B2211/7051 , F15B2211/7135 , F15B2211/7142
摘要： An object of the present invention is to provide a hydraulic control system for a work machine that is capable of reducing the loss caused by flow division while reducing a decrease in the speed of a hydraulic actuator due to a combined operation. The hydraulic control system for a work machine includes a first hydraulic actuator, one hydraulic pump, a second hydraulic actuator, and another hydraulic pump. The hydraulic control system further includes operating instruction detection means and pump flow control means. The operating instruction detection means detects that operating instructions are issued to the first hydraulic actuator and the second hydraulic actuator. The pump flow control means individually adjusts the delivery flow rate of the one hydraulic pump and the another hydraulic pump in accordance with operation amounts designated by the operating instructions for the first and second hydraulic actuators. When the first and second hydraulic actuators are simultaneously operated, the pump flow control means increases the delivery flow rate of the one hydraulic pump to a higher rate than when the first hydraulic actuator is operated and the second hydraulic actuator is not operated.

3. 发明公开

EP3203089A4 WORK VEHICLE HYDRAULIC DRIVE SYSTEM 有权
公开(公告)号：EP3203089A4
公开(公告)日：2018-06-27
申请号：EP15847051
申请日：2015-09-16
申请人： HITACHI CONSTRUCTION MACH CO
发明人： HIJIKATA SEIJI , ISHIKAWA KOUJI , IMURA SHINYA
IPC分类号： F15B21/14 , E02F9/22 , F15B11/024
CPC分类号： F15B11/024 , E02F3/32 , E02F3/425 , E02F3/435 , E02F9/22 , E02F9/2203 , E02F9/2217 , E02F9/2221 , E02F9/2235 , E02F9/2271 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B1/26 , F15B11/16 , F15B21/14 , F15B2011/0246 , F15B2211/20546 , F15B2211/255 , F15B2211/455 , F15B2211/6309 , F15B2211/6346 , F15B2211/7053 , F15B2211/71 , F15B2211/78 , F15B2211/88
摘要： To provide a hydraulic drive system for a work machine capable of securing a favorable operability in the case where hydraulic fluid discharged from a hydraulic actuator is regenerated for driving other hydraulic actuator. The hydraulic drive system for a work machine includes: a regeneration line that connects a bottom-side hydraulic chamber of a hydraulic cylinder to a portion between a hydraulic pump and a second hydraulic actuator; a regeneration flow rate adjustment device that supplies at least part of the hydraulic fluid discharged from the bottom-side hydraulic chamber to a portion between the hydraulic pump and the second hydraulic actuator through the regeneration line; a differential pressure calculating section that reads a pressure in the bottom-side hydraulic chamber of the hydraulic cylinder detected by a first pressure sensor and a pressure between the hydraulic pump and the second hydraulic actuator detected by a second pressure sensor, and calculates a differential pressure, or a differential pressure sensor; and a control unit that controls the regeneration flow rate adjustment device such as to gradually increase the flow rate of the hydraulic fluid flowing through the regeneration line according to an increase in the differential pressure calculated by the differential pressure calculation section or in the differential pressure detected by the differential pressure sensor.

4. 发明公开

EP2615212A4 HYBRID CONSTRUCTION MACHINE 失效转让
公开(公告)号：EP2615212A4
公开(公告)日：2017-11-08
申请号：EP11823388
申请日：2011-08-18
申请人： HITACHI CONSTRUCTION MACH CO
发明人： IMURA SHINYA , ISHIDA SEIJI , SATAKE HIDETOSHI , KAJITA YUSUKE , FUJISHIMA KAZUO , OOKI TAKATOSHI
IPC分类号： E02F9/20 , B60W10/06 , B60W10/08 , B60W10/103 , B60W10/30 , B60W20/00 , E02F9/22 , F02D29/00 , F02D29/04 , F02D31/00 , F02D41/02 , F02D45/00 , G05B13/02 , G06F17/00
CPC分类号： G06F17/00 , B60W10/06 , B60W10/08 , B60W10/103 , B60W10/30 , B60W20/00 , B60W2300/17 , E02F9/2075 , E02F9/2091 , E02F9/2235 , E02F9/2246 , F02D29/04 , F02D31/007 , F02D41/021 , G05B13/02 , Y02T10/56 , Y02T10/6286
摘要： [Problem] To provide a hybrid construction machine which can provide the same operation feeling as an ordinary construction machine that is not hybrid without changing the discharge flow rate of a hydraulic pump even when the rotation speed of an engine is changed according to power absorbed by the hydraulic pump. [Solution] A hybrid construction machine is provided with a variable displacement hydraulic pump 1 which supplies hydraulic oil to a hydraulic actuator, an engine 2 which is provided to be able to drive and rotate the hydraulic pump 1, an electric motor 3 which is provided to be able to drive and rotate the hydraulic pump 1, an engine control dial 4, a controller 4 and an operating lever 5 . The controller changes the rotation speed of the engine 2 to reduce fuel consumption according to power generated by the engine 2, and changes displacement of the hydraulic pump 1 based on the rotation speed of the engine 2, the dial position of the engine control dial 4 and the amount of operation on the operating lever 5.

5. 发明公开

EP3085969A4 CONSTRUCTION MACHINE 有权转让
标题翻译： BAUMASCHINE
公开(公告)号：EP3085969A4
公开(公告)日：2017-07-26
申请号：EP13899559
申请日：2013-12-20
申请人： HITACHI CONSTRUCTION MACH CO
发明人： IZUMI SHIHO , ISHIKAWA KOUJI , IMURA SHINYA , NISHIKAWA SHINJI , KANETA TOMOAKI , AMANO HIROAKI
IPC分类号： F15B21/14 , E02F9/12 , E02F9/20 , E02F9/22 , F15B15/08
CPC分类号： E02F9/2075 , B60W20/15 , B60W30/1886 , B60W2300/17 , B60W2510/09 , B60W2510/30 , B60W2710/083 , B60W2710/09 , B60Y2200/412 , B60Y2200/92 , B60Y2400/306 , E02F3/32 , E02F9/123 , E02F9/2095 , E02F9/2217 , E02F9/2228 , E02F9/2235 , E02F9/2282 , E02F9/2285 , E02F9/2296 , F15B15/088 , F15B2211/20546 , F15B2211/6313 , F15B2211/6336 , F15B2211/6652 , F15B2211/6654 , F15B2211/6658 , F15B2211/7058 , F15B2211/76 , F15B2211/88 , Y10S903/93
摘要： A construction machine includes: a swing structure (20); hydraulic and electric motors (25) mechanically coupled to each other; a hydraulic pump (41) that supplies hydraulic fluid to the hydraulic motor; swing control lever (72) that instructs the swing structure to make a swing motion; and a control device (80) that controls at least either a delivery flow rate of the hydraulic pump or an output torque of the electric motor in such a manner that meter-out and meter-in pressures of the hydraulic motor that is run together with the electric motor approach each other when the demanded torque necessary for the swing motion of the swing structure instructed by the swing control lever can be produced by the electric motor alone.
摘要翻译：一种建筑机械，包括：摆动结构（20）; 液压和电动马达（25）彼此机械联接; 液压泵（41），其向液压马达供给工作油; 摆动控制杆（72），其指示摆动结构进行摆动运动; 和控制装置（80），该控制装置（80）以如下方式至少控制液压泵的输送流量或电动机的输出转矩，即，使液压马达的出口节流和入口压力与当由摆动控制杆指示的摆动结构的摆动运动所需的要求转矩能够由电动机单独产生时，电动机彼此接近。

6. 发明公开

EP3040483A4 WORKING MACHINE 有权转让
标题翻译： ARBEITSMASCHINE
公开(公告)号：EP3040483A4
公开(公告)日：2017-05-24
申请号：EP14840726
申请日：2014-08-28
申请人： HITACHI CONSTRUCTION MACH CO
发明人： IMURA SHINYA , ISHIKAWA KOUJI , NISHIKAWA SHINJI , KANETA TOMOAKI , IZUMI SHIHO
IPC分类号： E02F9/20 , E02F9/12
CPC分类号： F15B11/20 , E02F9/123 , E02F9/2095 , F15B11/04 , F15B13/0846 , F15B2211/6651 , F15B2211/75 , F15B2211/78
摘要： Provided is a work machine using a hydraulic motor and an electric motor to drive a swing structure, the work machine being adapted to reduce fuel consumption in regions where swinging by the hydraulic motor is prone to deteriorate in efficiency, such as when an operating stroke of swinging is small. The work machine includes an engine, a hydraulic pump driven by the engine, a swing structure, an electric motor for driving the swing structure, a hydraulic motor for driving the swing structure, the hydraulic motor being driven by the hydraulic pump, and a swing control lever device that commands the swing structure to be driven. The work machine further includes a control device operates in either an electric swing mode in which the swing structure is driven mainly by torque of the electric motor or a hydraulic swing mode in which the swing structure is driven mainly by torque of the hydraulic motor, depending on an operating stroke of the control lever device and/or a swing speed of the swing structure.
摘要翻译：本发明提供一种作业机械，该作业机械使用液压马达和电动马达来驱动旋转体，该作业机械在由液压马达进行的摆动的效率容易恶化的区域，摆动很小。作业机械包括发动机，由发动机驱动的液压泵，旋转体，用于驱动旋转体的电动机，用于驱动旋转体的液压马达，由液压泵驱动的液压马达，控制杆装置，其命令摆动结构被驱动。作业机械还具有控制装置，该控制装置以主要通过电动机的转矩驱动旋转体的电动旋转模式或主要通过液压电动机的转矩驱动旋转体的液压旋转模式控制杆装置的操作行程和/或摆动结构的摆动速度。

7. 发明公开

EP3037589A4 CONSTRUCTION MACHINE 有权
标题翻译：建筑机械
公开(公告)号：EP3037589A4
公开(公告)日：2017-04-12
申请号：EP14837337
申请日：2014-08-20
申请人： HITACHI CONSTRUCTION MACH CO
发明人： IZUMI SHIHO , IMURA SHINYA , ISHIKAWA KOUJI , KANETA TOMOAKI , AMANO HIROAKI , NISHIKAWA SHINJI
IPC分类号： E02F9/20 , B60L1/00 , E02F9/12 , E02F9/22 , F04B49/00 , H02P6/08 , H02P27/06
CPC分类号： E02F9/2235 , B60L1/00 , E02F9/123 , E02F9/2004 , E02F9/2075 , E02F9/2091 , E02F9/2095 , E02F9/2267 , E02F9/2282 , E02F9/2285 , E02F9/2296 , F04B49/002 , H02P6/08 , Y02T10/642
摘要： Provided is a construction machine capable of securing excellent operability and achieving great fuel reduction effect by efficiently using recovered energy. A construction machine, comprising a hydraulic pump of the variable displacement type which is driven by an engine, a swing hydraulic motor, a swing electric motor, a delivery capacity regulating device which regulates the delivery capacity of the hydraulic pump, and a control unit which controls the driving/braking of the swing structure by using the sum total of torque of the swing hydraulic motor and torque of the swing electric motor when a swing control lever is operated, is configured to comprise an operation amount detection device for detecting the operation amount of the swing control lever and a speed detection device for detecting the speed of the swing electric motor. The control unit includes a hydraulic pump output reduction control unit which takes in an operation amount signal representing the operation amount of the swing control lever detected by the operation amount detection device and a speed signal representing the speed of the swing electric motor detected by the speed detection device and controls the delivery capacity regulating device by calculating a reduction rate of the output of the hydraulic pump based on the detection signals.

8. 发明公开

EP3208387A4 HYBRID CONSTRUCTION MACHINERY 有权
公开(公告)号：EP3208387A4
公开(公告)日：2018-06-27
申请号：EP15850315
申请日：2015-10-13
申请人： HITACHI CONSTRUCTION MACH CO
发明人： TAKAHASHI CHIAKI , IMURA SHINYA , TAKEUCHI KEN , ISHIDA SEIJI , NAYA ITARU , HITA MASAFUMI
IPC分类号： E02F9/20 , B60K6/20 , B60K6/28 , B60K6/485 , B60L9/18 , B60L11/14 , B60W10/06 , B60W10/08 , B60W10/30 , B60W20/00 , B60W20/10 , H02J7/00
CPC分类号： B60L11/1859 , B60K6/20 , B60K6/28 , B60K6/485 , B60L9/18 , B60L11/14 , B60L11/1861 , B60W10/06 , B60W10/08 , B60W10/26 , B60W10/30 , B60W20/00 , B60W20/10 , B60W20/13 , B60W2300/17 , B60W2510/244 , B60W2510/246 , B60W2710/086 , B60W2710/248 , B60W2710/305 , B60Y2200/41 , B60Y2200/92 , E02F3/30 , E02F9/20 , E02F9/2075 , E02F9/2091 , E02F9/2203 , F15B11/16 , F15B2211/26 , H02J7/00 , Y02T10/6226 , Y02T10/6286 , Y02T10/7077 , Y02T10/7241 , Y10S903/93
摘要： Provided is hybrid construction machine that can charge/discharge an electrical storage device appropriately and can suppress stop of an engine accompanying sharp increase of a load. The present invention includes a hybrid controller 22 that controls power of a hydraulic pump 17 and electric power of an inverter 15 in response to storage battery characteristics of the electrical storage device 16, and an output command unit 22F of the hybrid controller 22 is configured to control at least either one of the power of the hydraulic pump 17 and the electric power of the inverter 15 on the basis of at least either one of electric current or voltage of the storage battery characteristics and at least either one of temperature or a state of charge of the storage battery characteristics.

9. 发明公开

EP2672025A4 HYBRID CONSTRUCTION MACHINE 有权转让
公开(公告)号：EP2672025A4
公开(公告)日：2018-04-04
申请号：EP12742161
申请日：2012-01-05
申请人： HITACHI CONSTRUCTION MACH CO
发明人： IMURA SHINYA , ISHIKAWA KOUJI , SATAKE HIDETOSHI , OOKI TAKATOSHI , NISHIKAWA SHINJI , EDAMURA MANABU
IPC分类号： E02F9/20 , E02F9/12 , E02F9/22
CPC分类号： E02F9/123 , E02F9/2037 , E02F9/2095 , Y10S903/903 , Y10S903/93
摘要： In hybrid construction machine employing a hydraulic motor and an electric motor for the driving of the swing structure, satisfactory operability of a combined operation of the swing structure and other actuators is secured irrespective of the operating status of the electric motor. A control device of the hybrid construction machine executes control selected from: hydraulic/electric complex swing control for driving the swing structure by total torque of the electric motor and the hydraulic motor when a swing operating lever device is operated; and hydraulic solo swing control for driving the swing structure by the torque of the hydraulic motor alone when the swing operating lever device is operated. The control device controls drive torque or driving force of each of the electric motor, the hydraulic motor and a second hydraulic actuator so that the relationship between the position or the speed of the second hydraulic actuator and the swing angle or the swing speed of the swing structure in the combined operation when the swing operating lever device and a second operating lever device are operated at the same time during the hydraulic/electric complex swing control is substantially identical with the relationship in the combined operation during the hydraulic solo swing control.

10. 发明公开

EP3147519A4 HYDRAULIC ENERGY REGENERATION APPARATUS FOR MACHINERY 有权
公开(公告)号：EP3147519A4
公开(公告)日：2018-01-10
申请号：EP14892002
申请日：2014-05-16
申请人： HITACHI CONSTRUCTION MACH CO
发明人： HIJIKATA SEIJI , ISHIKAWA KOUJI , OOKI TAKATOSHI , IMURA SHINYA
IPC分类号： F15B21/14 , E02F9/20 , E02F9/22 , F04B49/00 , F15B21/08
CPC分类号： E02F9/2217 , E02F3/32 , E02F9/2095 , E02F9/2232 , E02F9/2235 , E02F9/2242 , E02F9/2292 , E02F9/2296 , F04B49/00 , F15B11/16 , F15B13/06 , F15B21/087 , F15B21/14 , F15B2211/20515 , F15B2211/20523 , F15B2211/20546 , F15B2211/20576 , F15B2211/255 , F15B2211/61 , F15B2211/6309 , F15B2211/6313 , F15B2211/6316 , F15B2211/6652 , F15B2211/6654
摘要： Provided is a hydraulic fluid energy regeneration device for a work machine, including: a regeneration hydraulic motor driven by discharged return hydraulic fluid; a first hydraulic pump mechanically connected to the regeneration hydraulic motor; a second hydraulic pump that delivers an hydraulic fluid for driving a first hydraulic actuator and/or a second hydraulic actuator; a junction line that allows the hydraulic fluid delivered by the second hydraulic pump to be joined; a second regulator that regulates the delivery flow rate of the second hydraulic pump; and a first regulator that regulates the flow rate of the hydraulic fluid coming from the first hydraulic pump and flowing through the junction line. A control unit includes: a first computing part that calculates a demanded pump flow rate in accordance with the input target replacement command for the second hydraulic pump, the first computing part further outputting a control command to the first regulator in such a manner that the flow rate of the hydraulic fluid coming from the first hydraulic pump and flowing through the junction line equals to or lower than the demanded pump flow rate; and a second computing part that subtracts from the demanded pump flow rate the flow rate of the hydraulic fluid coming from the first hydraulic pump to obtain a target pump flow rate, the second computing part further outputting a control command to the second regulator in such a manner that the calculated target pump flow rate is attained.

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