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公开(公告)号：US10851521B2
公开(公告)日：2020-12-01
申请号：US16329951
申请日：2018-02-21
发明人： Taiki Aizawa , Shinji Nishikawa , Kouichi Shibata
IPC分类号： E02F9/22 , E02F3/43 , B60K6/485 , E02F3/42 , F04B49/06 , F15B11/16 , B60K6/36 , B60W10/10 , B60W20/00 , F04B35/00 , E02F9/20
摘要： A hydraulic excavator (1) includes a hydraulic pump (22) driven by an engine (20), an electromagnetic proportional valve (24) for hydraulic pump that adjusts pump torque of the hydraulic pump (22) in response to a pump torque target value (Tp), a hydraulic actuator operated by a delivery pressure of the hydraulic pump (22), a motor generator (30) connected to the engine (20), and a controller (26) configured to calculate the pump torque target value (Tp). The controller (26) acquires a pump torque adjustment amount (Qadj) based on a deviation (ΔAH) between a current integrating value (AH1) acquired by integrating a value of a current flowing into the motor generator (30) when the hydraulic actuator is driven and a current integrating reference value (AH0).
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公开(公告)号：US09822803B2
公开(公告)日：2017-11-21
申请号：US14768570
申请日：2014-08-28
发明人： Shinya Imura , Kouji Ishikawa , Hidetoshi Satake , Shinji Nishikawa , Tomoaki Kaneta , Shiho Izumi
CPC分类号： F15B11/20 , E02F9/123 , E02F9/2095 , F15B11/04 , F15B13/0846 , F15B2211/6651 , F15B2211/75 , F15B2211/78
摘要： A work machine is adapted for reduced fuel consumption in regions where swinging by a hydraulic motor is prone to deterioration in efficiency, such as when the operating stroke of the swinging is small. The work machine includes an engine, a hydraulic pump, a swing structure, an electric motor for driving the swing structure, and a hydraulic motor for driving the swing structure, the hydraulic motor being driven by the hydraulic pump, and includes a swing control lever device that commands the swing structure to be driven. 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.
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公开(公告)号：US09567730B2
公开(公告)日：2017-02-14
申请号：US14770258
申请日：2014-08-28
发明人： Shinya Imura , Kouji Ishikawa , Hidetoshi Satake , Shinji Nishikawa , Tomoaki Kaneta , Shiho Izumi
CPC分类号： E02F9/123 , B60L11/08 , B60L2200/40 , B60L2240/423 , B60L2240/525 , E02F9/2004 , E02F9/2095 , H02P27/06 , Y02T10/642 , Y02T10/70 , Y02T10/7077
摘要： A work machine prevents a fault in a swing electric motor if an uneven coil temperature increase occurs in the swing electric motor during swing press and related operations. An electricity storage device is connected to the electric motor. An inverter drives the electric motor and a swing control lever issues a command to drive the swing structure. A rotational speed detecting device detects swing speed of the swing structure and a controller controls torque of the electric motor. The controller reads the swing speed of the swing structure detected by the rotational speed detecting device to control such that, when the swing speed is zero, the torque of the electric motor is smaller than a maximum torque value and, when the swing speed is a first rotational speed higher than zero, the torque of the electric motor is the maximum torque value.
摘要翻译： 如果在摆动式电动机和相关操作期间在摆动电动机中发生不均匀的线圈温度升高，则作业机器可以防止摆动电动机中的故障。 蓄电装置与电动机连接。 变频器驱动电动机，摆动控制杆发出驱动摆动结构的指令。 转速检测装置检测摆动结构的摆动速度，控制器控制电动机的转矩。 控制器读取由转速检测装置检测到的摆动结构的摆动速度，以控制使得当摆动速度为零时，电动机的扭矩小于最大扭矩值，并且当摆动速度为 第一转速高于零，电动机转矩为最大转矩值。
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公开(公告)号：US11248364B2
公开(公告)日：2022-02-15
申请号：US15998937
申请日：2017-02-24
摘要： To control a rate of increase of a delivery flow rate of a pump for a swing operation in response to a moment of inertia and an operation amount and to achieve both energy efficiency and operability with respect to the swing operation, a work machine including a swing structure 2 disposed on an upper portion of a track structure 1, a work implement 3 disposed in the swing structure 2, a swing motor 16, a hydraulic pump 22, a regulator 24, a directional control valve 31, and an operation device 34 further includes: a target maximum flow rate calculation section 53 configured to calculate a target maximum flow rate Qmax of the pump to correspond to a swing operation amount Ps; a flow rate rate-of-increase calculation section 55 configured to calculate a rate of increase dQ of a command flow rate of the hydraulic pump 22 on a basis of the moments of inertia of the swing structure 2 and the work implement 3 and the swing operation amount Ps; a command flow rate calculation section 56 configured to calculate a command flow rate Q(t) on a basis of the rate of increase dQ with the target maximum flow rate Qmax set as an upper limit; and an output section 57 configured to output a command signal Sf to the regulator 24 corresponding to the command flow rate Q(t).
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公开(公告)号：US10557251B2
公开(公告)日：2020-02-11
申请号：US15554316
申请日：2016-03-10
发明人： Shinya Imura , Shinji Nishikawa , Manabu Edamura , Kouji Ishikawa , Masatoshi Hoshino , Shinji Ishihara
摘要： The first engine speed or a work machine is higher than the minimum engine speed, and the second engine speed is higher than the first engine speed and lower than the maximum engine speed. The ratio of the change in the target engine speed to the change in the operation amount of the engine speed instructing device when the operation amount of the engine speed instructing device is changed from the operation amount for instructing the minimum speed to the operation amount for instructing the first engine speed is larger than the ratio of the change in the target engine speed to the change in the operation amount of the engine speed instructing device when the operation amount of the engine speed instructing device is changed from the operation amount for instructing the second engine speed to the operation amount for instructing the maximum speed.
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公开(公告)号：US10458097B2
公开(公告)日：2019-10-29
申请号：US15758273
申请日：2016-09-02
发明人： Hiroaki Amano , Shinya Imura , Ryouhei Yamashita , Shinji Ishihara , Shinji Nishikawa , Masafumi Hita
IPC分类号： E02F9/20 , B60K6/36 , B60K6/48 , B60W10/26 , F04B49/06 , F04B49/12 , B60K6/28 , B60K6/485 , F04B49/08 , F04B49/10 , E02F9/22 , B60L50/16 , B60L1/00 , B60W20/13
摘要： A hybrid work machine that can suppress excessive limiting on pump absorption power even in a situation in which supply of electric power to an electric motor is limited is provided. The hybrid work machine includes: an engine 22; an assist generator motor 23 connected to the engine 22 in such a manner that a torque can be transmitted to the engine 22; an electric storage device 24 that supplies electric power to the assist generator motor 23; a monitoring device 28 that monitors the electric storage device 24 and that acquires electric storage device information; a hydraulic pump 41 driven by the engine 22 and the assist generator motor 23; and a pump regulator 43 that regulates a delivery flow rate of the hydraulic pump 41. The hybrid work machine includes: an increasing rate computing section 81 that computes an allowable increasing rate r in response to the electric storage device information for pump absorption power; a limited power computing section 82 that computes a limited value WPlim of the pump absorption power on the basis of the allowable increasing rate r; and a pump control section 86 that controls the delivery flow rate of the hydraulic pump 41 in response to the limited pump power WPlim.
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公开(公告)号：US10329737B2
公开(公告)日：2019-06-25
申请号：US15552829
申请日：2016-02-22
发明人： Masafumi Hita , Shinya Imura , Shinji Nishikawa
IPC分类号： B60K6/46 , E02F9/20 , E02F9/26 , B60K25/00 , B60K25/02 , B60W10/04 , B60W10/06 , B60W10/08 , B60W10/30 , B60W20/00 , B60W50/14
摘要： An output command calculating section (40) of an HCU (36) restricts a battery discharge power from an electricity storage device (31) based upon a battery electricity storage rate (SOC) and a current square integrating rate (Risc) of the electricity storage device (31). Thereby, the HCU (36) transfers from a normal mode (NMODE) to a low speed mode (LSMODE) to lower a movement speed of a hydraulic actuator. A monitor display amount calculating section (50) of the HCU (36) calculates a maximum speed reduction rate (DRs) based upon a battery discharge power limit value (Plim0) and an engine output upper limit value (Pemax) from the output command calculating section (40). A monitor device (39) displays a reduction rate of the movement speed of the hydraulic actuator in the low speed mode (LSMODE) based on the maximum speed reduction rate (DRs).
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公开(公告)号：US10030363B2
公开(公告)日：2018-07-24
申请号：US15040433
申请日：2016-02-10
发明人： Shinya Imura , Shinji Nishikawa , Masafumi Hita , Hiroaki Amano
IPC分类号： F15B21/14 , E02F9/22 , E02F9/20 , B60K6/485 , B60W20/00 , F15B11/08 , F15B13/04 , B60W10/30 , E02F3/32
摘要： A hybrid work machine has an engine, an assist motor, a hydraulic pump which is driven by the total torque of the engine and the assist motor, and an electric storage device which accumulates electric power generated by the assist motor and supplies the electric power when the assist motor performs electric discharge. The continuous electric discharge from the electric storage device due to continuous operation at high load pressure can be suppressed without an operator experiencing an unusual operational characteristic. To this end, a pump flow rate correction control unit judges whether each hydraulic pump is in a high load operation state or not based on the output horsepower and/or the delivery pressure of each hydraulic pump and performs control such that the delivery flow rate gradually decreases when the hydraulic pump is in the high load operation state and this state continues beyond a predetermined time.
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公开(公告)号：US20150219123A1
公开(公告)日：2015-08-06
申请号：US14431482
申请日：2013-10-15
CPC分类号： F15B11/04 , E02F9/123 , E02F9/20 , E02F9/2095 , E02F9/22 , E02F9/2203 , E02F9/2217 , E02F9/2282 , E02F9/2285 , E02F9/2296 , F15B11/162 , F15B11/165 , F15B13/06 , F15B13/14 , F15B2015/206 , F15B2211/205 , F15B2211/20515 , F15B2211/7058 , F15B2211/7135 , F15B2211/75 , F15B2211/781
摘要： A construction machine includes: a swing structure (50); a hydraulic pump (1); a hydraulic motor (3) for driving the swing structure (50) using hydraulic fluid from the hydraulic pump (1); an electric motor (14) for driving the swing structure (50) with or without the aid of the hydraulic motor (3); and a hydraulic actuator (16) driven by the hydraulic fluid from the hydraulic pump 1, the hydraulic actuator can be operated together with the swing structure (50). When the swing structure (50) is operated together with the hydraulic actuator (16), only the electric motor (14) is used to swing the swing structure (50).
摘要翻译： 一种施工机械，包括：摆动结构（50）; 液压泵（1）; 用于使用来自液压泵（1）的液压流体驱动摆动结构（50）的液压马达（3）; 用于在或不借助所述液压马达（3）驱动所述摆动结构（50）的电动机（14）。 以及由来自液压泵1的液压流体驱动的液压致动器（16），液压致动器可与摆动结构（50）一起操作。 当摆动结构（50）与液压致动器（16）一起操作时，仅使用电动机（14）摆动摆动结构（50）。
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公开(公告)号：US12104360B2
公开(公告)日：2024-10-01
申请号：US17640928
申请日：2020-10-28
CPC分类号： E02F9/262 , E02F3/435 , E02F9/2033
摘要： Provided is a construction machine that avoids automatic release of operation restriction involving, for example, sudden acceleration unintended by an operator even when an inclined angle of a vehicle body changes. The construction machine includes a vehicle body 50 configured to operate, 3D sensors (obstacle detection devices) 5, 6, 7, and 8 that detect an obstacle present around the vehicle body 50, an inclined angle determination device (an inclined angle detection device) 9 that detects the inclined angle of the vehicle body 50, and a vehicle body controller (a controller) 14 having an operation restriction function that performs a restriction control to restrict an operation of the vehicle body 50 when the 3D sensors (the obstacle detection devices) 5, 6, 7, and 8 detect an obstacle. When the inclined angle of the vehicle body 50 exceeds a predetermined threshold while the restriction control is not performed with the operation restriction function, the vehicle body controller (the controller) 14 disables the operation restriction function. When the inclined angle of the vehicle body 50 exceeds the predetermined threshold while the restriction control is performed with the operation restriction function, the vehicle body controller (the controller) 14 does not disable the operation restriction function.
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