公开(公告)号：US20230272598A1

公开(公告)日：2023-08-31

申请号：US18017424

申请日：2021-08-02

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Masatoshi YOSHIMURA ,  Hiroyuki KOBAYASHI ,  Satoru KANEKO ,  Noritaka ITOU ,  Satoshi SEKINO ,  Katsuhiko TOKUDA

IPC: E02F9/20 ,  E02F9/22 ,  F16H61/44 ,  F16H61/42 ,  F16H61/472

CPC classification number: E02F9/2075 ,  E02F9/2095 ,  E02F9/2221 ,  F16H61/44 ,  F16H61/42 ,  F16H61/472 ,  B60Y2200/415 ,  F16H59/14

Abstract: A work vehicle includes: an engine; a hydraulic pump that is driven by the engine; hydraulic cylinders that are extended and contracted by pressurized fluid delivered from the hydraulic pump; a work device that is moved according to the extension/contraction operations of the hydraulic cylinders; a travel device that is driven independently of the work device; an electrically driven motor that is driven by electric power generated by the engine to operate the travel device; and a controller that controls the hydraulic cylinders and the electrically driven motor. The controller controls the output power of the hydraulic pump and the output power of the electrically driven motor by changing the distribution ratios of a first torque consumed by the work device and a second torque consumed by the travel device among torques output by the engine, on the basis of a reaction force received by the vehicle body.

公开(公告)号：US20210262198A1

公开(公告)日：2021-08-26

申请号：US17255185

申请日：2019-03-28

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Hiroshi UTASHIRO ,  Akinori KAMIYA ,  Noritaka ITO ,  Takatoshi OOKI ,  Satoshi SEKINO

IPC: E02F9/20 ,  B60K6/46 ,  B60W10/06 ,  B60W10/08 ,  B60W10/198 ,  B60W10/30 ,  B60W20/14 ,  B60L50/61

Abstract: To provide a technique for reliably acquiring a required braking power during travel and for efficiently using a regenerative power generated during braking. A work vehicle calculates a regenerative power outputted from an electric motor and a target hydraulic driving power for driving a hydraulic pump, supplies the regenerative power to the generator motor operating as a motor and makes the generator motor consume the regenerative power in a case where the regenerative power is equal to or smaller than the target hydraulic driving power, and supplies the regenerative power to the generator motor operating as the motor and makes an exhaust brake consume a power equivalent to a difference between the regenerative power and the target hydraulic driving power in a case where the regenerative power is larger than the target hydraulic driving power.

公开(公告)号：US20230313488A1

公开(公告)日：2023-10-05

申请号：US18021202

申请日：2022-02-18

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Masatoshi YOSHIMURA ,  Hiroyuki KOBAYASHI ,  Satoru KANEKO ,  Noritaka ITOU ,  Satoshi SEKINO

IPC: E02F3/43 ,  E02F9/20 ,  E02F9/22

CPC classification number: E02F3/434 ,  E02F9/2075 ,  E02F9/2079 ,  E02F9/2235

Abstract: The work vehicle 1 includes a main controller 100 that controls a travel driving force and a work driving force. The main controller 100 includes a travel remaining time calculating unit 111 that calculates a remaining time until a target rise/run distance is reached as a travel remaining time tC, a work remaining time calculating unit 112 that calculates a remaining time until a target arm angle is reached as a work remaining time t1, a rise/run determining unit 113 that determines whether rise/run is being performed or not, a correction rate setting unit 114 that sets a travel correction rate ηC that adjusts a travel driving torque and a work correction rate ηI that adjusts a work driving torque based on the travel remaining time tC, the work remaining time t1, and the rise/run determination flag, and an engine torque distribution calculating unit 115 that calculates a travel driving torque command and a work driving torque command based on the travel correction rate ηC and the work correction rate ηI.

公开(公告)号：US20160230369A1

公开(公告)日：2016-08-11

申请号：US15021806

申请日：2014-10-08

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Satoru KANEKO ,  Takashi IKIMI ,  Noritaka ITOU ,  Satoshi SEKINO

IPC: E02F9/20 ,  B60W10/26 ,  B60W10/06 ,  B60W10/08 ,  B60W20/13 ,  B60W30/188

CPC classification number: E02F9/2075 ,  B60K6/46 ,  B60W10/06 ,  B60W10/08 ,  B60W10/26 ,  B60W20/00 ,  B60W20/13 ,  B60W30/188 ,  B60W2300/17 ,  B60W2400/00 ,  B60W2420/20 ,  B60W2510/30 ,  B60W2510/305 ,  B60W2520/00 ,  B60W2520/10 ,  B60W2530/00 ,  B60W2550/00 ,  B60W2550/10 ,  B60W2710/0644 ,  B60W2710/0677 ,  B60W2710/248 ,  E02F9/2246 ,  Y02T10/6217 ,  Y02T10/6286 ,  Y10S903/93

Abstract: A hybrid wheel loader includes a control device (200) that estimates output power of an engine (1) and an electricity storage device (11) when the hybrid wheel loader is inferred on the basis of output values of detectors (62, 63) to be traveling towards an object of excavation in order to perform an excavating work, and then, if the output power is less than target power considered necessary for the excavating work, accelerates the engine (1) to a target revolution speed while increasing the electric power supplied from the electricity storage device to a traveling motor (9). Accordingly, power necessary for excavation can be drawn from the engine even when the engine revolution speed is low and there is a fear of power deficiency occurring at the time of the excavating work.

Abstract translation: 混合轮式装载机包括：当基于检测器（62,63）的输出值推断混合轮式装载机时，估计发动机（1）和蓄电装置（11）的输出功率的控制装置（200） 为了进行挖掘作业而向挖掘对象行驶，然后如果输出功率小于挖掘作业所需要的目标功率，则在增加电力的同时将发动机（1）加速到目标转速 从蓄电装置供给到行驶马达（9）。 因此，即使在发动机转速低的情况下也能够从发动机抽出所需的动力，并且在挖掘作业时存在发生缺电的担心。