公开(公告)号：US20170284062A1

公开(公告)日：2017-10-05

申请号：US15510248

申请日：2016-02-29

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Tadashi OSAKA ,  Ken TAKEUCHI ,  Akira WATANABE

IPC: E02F9/20 ,  B60W20/00 ,  B60K6/28 ,  E02F9/26 ,  B60K6/485

CPC classification number: E02F9/2095 ,  B60K6/28 ,  B60K6/485 ,  B60L3/0046 ,  B60L58/25 ,  B60L58/27 ,  B60L2200/40 ,  B60L2240/545 ,  B60L2240/662 ,  B60W20/00 ,  B60W2300/17 ,  B60W2510/246 ,  B60W2530/00 ,  B60W2550/12 ,  B60W2710/242 ,  B60W2710/246 ,  E02F3/32 ,  E02F9/2075 ,  E02F9/2091 ,  E02F9/26 ,  E02F9/267 ,  F02D29/02 ,  Y02T10/6226 ,  Y02T10/7005 ,  Y02T10/705 ,  Y02T10/7291 ,  Y02T90/16 ,  Y10S903/903

Abstract: The object of the present invention is to provide a hybrid construction machine that can quickly warm up an electrical storage device and can improve the service life of the electrical storage device. This hybrid construction machine is equipped with: a prime mover (1); an electric motor that supplements the power of the prime mover (1) and generates electric power; an electrical storage device (8) that transmits power to and receives power from the electric motor; a warm-up circuit (25) that circulates a heating medium heated by waste heat from the prime mover (1) or the electric motor, or by a heater (40), to the vicinity of the electrical storage device (8); a control device that controls charging/discharging of the electrical storage device (8) and circulation of the heating medium of the warm-up circuit (25); and an outside air temperature measurement device that measures the outside air temperature. The control device executes warm-up operation by means of the heating medium, determines whether or not to execute charging/discharging of the electrical storage device (8) for the purpose of the warm-up operation in response to the outside air temperature measured by the outside air temperature measurement device, and conducts warm-up operation in which the warm-up operation by charging/discharging of the electrical storage device (8) is effected simultaneously.

公开(公告)号：US20210062467A1

公开(公告)日：2021-03-04

申请号：US16644288

申请日：2018-07-23

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Akira WATANABE ,  Ken TAKEUCHI ,  Tadashi OSAKA

IPC: E02F9/08 ,  E02F9/20

Abstract: An engine cooling system (22) includes an engine (11), an engine cooling pipe line (23), an engine water pump (24) and an engine radiator (25). An electricity storage device cooling system (27) includes an electricity storage device (19), an electricity storage device cooling pipe line (28), an electricity storage device water pump (29) and an electricity storage device radiator (31). Different heat-transfer media (engine cooling water and electricity storage device cooling water) flow respectively in the engine cooling system (22) and the electricity storage device cooling system (27). Further, a heating heat exchanger (32) is provided in the halfway of the engine cooling pipe line (23) and in the halfway of the electricity storage device cooling pipe line (28) for performing heat exchange between the engine cooling water and the electricity storage device cooling water.

公开(公告)号：US20180347150A1

公开(公告)日：2018-12-06

申请号：US15778301

申请日：2016-11-11

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Hidekazu MORIKI ,  Hiroshi SAKAMOTO ,  Yasutaka TSURUGA ,  Tadashi OSAKA ,  Ryu NARIKAWA

IPC: E02F9/20 ,  E02F3/32 ,  E02F9/12 ,  E02F3/42 ,  E02F9/22 ,  E02F9/26 ,  E02F3/43 ,  F15B15/18 ,  F15B15/28

CPC classification number: E02F9/2033 ,  B66C13/18 ,  B66C23/82 ,  B66C23/86 ,  E02F3/32 ,  E02F3/425 ,  E02F3/435 ,  E02F9/123 ,  E02F9/2004 ,  E02F9/2225 ,  E02F9/2267 ,  E02F9/26 ,  F15B11/04 ,  F15B13/02 ,  F15B15/18 ,  F15B15/2815

Abstract: A control system for a construction machine stops an upper swing structure at a desired swing stop angle. A main controller sets a swing stop target angle at which an upper swing structure is to be stopped. A swing stoppability determination section reads an angle signal of the upper swing structure with respect to an undercarriage and an angle of a work implement, and determines whether the swing of the upper swing structure can be stopped at the swing stop target angle. A work implement is controlled in such a manner that an extension action of the work implement in a swing radial direction is prohibited or a contraction action of the work implement in the swing radial direction is executed in response to a signal that indicates whether the swing can be stopped and that is determined by the swing stoppability determination section.

公开(公告)号：US20180087587A1

公开(公告)日：2018-03-29

申请号：US15451455

申请日：2017-03-07

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Naoki FUKUDA ,  Tadashi OSAKA ,  Ryuji KOUNO ,  Masatsugu ARAI ,  Takanobu IKARI ,  Takaaki TANAKA

IPC: F16D48/06

CPC classification number: F16D48/06 ,  F16D2500/30426 ,  F16D2500/3056 ,  F16D2500/3067 ,  F16D2500/70442 ,  F16D2500/70446 ,  F16D2500/7061 ,  F16D2500/7101

Abstract: Provided is a clutch control device for a work machine capable of controlling a fan to an appropriate rotational speed. In the clutch control device for the work machine, a controller includes a target fan rotational speed calculation module that calculates a target fan rotational speed for the fan, a clutch characteristic curve storage module that stores a plurality of clutch characteristic curves, a clutch command calculation module that outputs with reference to a clutch characteristic curve a first clutch control signal corresponding to the target fan rotational speed, a feedback control module that output a second clutch control signal based on the difference between the target fan rotational speed and an actual fan rotational speed, and an adder that adds the first clutch control signal and the second clutch control signal to output a third clutch control signal.

公开(公告)号：US20200156483A1

公开(公告)日：2020-05-21

申请号：US16631891

申请日：2018-06-19

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Satoru KANEKO ,  Shinji SUGIMOTO ,  Takayoshi NAKAMURA ,  Tadashi OSAKA ,  Masatsugu ARAI ,  Naoki FUKUDA

IPC: B60L50/10 ,  B60K6/24 ,  B60K6/26 ,  B60K7/00 ,  B60K6/46 ,  B60L53/20

Abstract: A dump truck 100 including: an engine 1; a generator 10 driven by the engine 1; and a pair of driving wheels 3L and 3R arranged to the left and right of a vehicle body frame 7 includes: a traveling electric motor 12L including a plurality of electric motors 12La, 12Lb, and 12Lc that are coupled to the driving wheel 3L and simultaneously drive the driving wheel 3L; and a traveling electric motor 12R including a plurality of electric motors 12Ra, 12Rb, and 12Rc that are coupled to the driving wheel 3R and simultaneously drive the driving wheel 3R. Thereby, drive systems corresponding to loads of dump trucks or the like can be configured using identical components.

公开(公告)号：US20190100899A1

公开(公告)日：2019-04-04

申请号：US16085402

申请日：2017-09-08

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Shota KIMURA ,  Tadashi OSAKA ,  Hidekazu MORIKI ,  Kazuo ISHIDA ,  Noritaka ITOU

IPC: E02F9/20 ,  E02F9/22

Abstract: A wheel loader includes a working device, a lift cylinder 152 which is a hydraulic actuator that drives the working device, a hydraulic pump 220 that supplies hydraulic oil to the lift cylinder 152, a lift cylinder bottom pressure detector 252 that detects a pressure of the lift cylinder 152, a control valve 221 that controls the amount of hydraulic oil to be supplied from the hydraulic pump 220 to the lift cylinder 152, a vehicle acceleration detector 254 that detects a vehicle acceleration in a longitudinal direction, and a control device 240. The control device 240 determines whether the working device has started excavation, or not, based on the lift cylinder bottom pressure detected by the lift cylinder bottom pressure detector 252 and the vehicle acceleration detected by the vehicle acceleration detector 254.

公开(公告)号：US20180320338A1

公开(公告)日：2018-11-08

申请号：US15774689

申请日：2016-10-31

Applicant: Hitachi Construction Machinery Co., Ltd.

Inventor： Tadashi OSAKA ,  Ken TAKEUCHI ,  Seiji ISHIDA

IPC: E02F9/20 ,  B60L11/12 ,  B60K6/28 ,  B60L11/14 ,  E02F9/08 ,  E02F9/22 ,  H01M10/613 ,  H01M10/633 ,  H01M10/625 ,  H01M10/6563 ,  H01M10/6568

Abstract: It is an object of the present invention to provide hybrid construction machinery in which a power storage apparatus can be warmed up quickly and a life of the power storage apparatus can be lengthened. The hybrid construction machinery includes: an electric motor assisting a prime mover in power and generating electric power; the power storage apparatus transferring electric power to and from the electric motor; a warm-up circuit circulating a warming medium in the vicinity of the power storage apparatus; and a control device controlling circulation of the warming medium in the warm-up circuit. The hybrid construction machinery is provided with on-board equipment state detection units that detect states of on-board equipment to estimate an output request for the power storage apparatus from the on-board equipment. The control device controls circulation of the warming medium based on a temperature of the power storage apparatus and a determination temperature for determining whether to circulate the warming medium in the warm-up circuit. The control device further varies the determination temperature according to a result of detection by the on-board equipment state detection units.