Patents by Inventor Hiroaki Amano
Hiroaki Amano has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170356163Abstract: A motor-generator (27) is connected mechanically to an engine (21) and a hydraulic pump (23). The hydraulic pump (23) delivers pressurized oil to cylinders (12D) to (12F) in a working mechanism (12), a traveling hydraulic motor (25) and a revolving hydraulic motor (26). The revolving hydraulic motor (26) drives a revolving device (3) in cooperation with a revolving electric motor (33). An HCU (36) reduces outputs of the revolving electric motor (33), the revolving hydraulic motor (26), the boom cylinder (12D) and the like such that a ratio of a revolving speed of an upper revolving structure (4) and a movement speed of raising a boom (12A) is held to a ratio in a normal mode (NMODE) at the time of performing a compound movement of a revolving movement and a boom-raising movement in a low speed mode (LSMODE).Type: ApplicationFiled: January 19, 2016Publication date: December 14, 2017Inventors: Masafumi HITA, Shinya IMURA, Shiho IZUMI, Hidekazu MORIKI, Hiroaki AMANO
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Patent number: 9827928Abstract: A vehicle comprises first and second operation units operated to perform switching between an electric power supply state and an electric power cut-off state of respective first and second electric components and a retaining device which starts electric power supply to the second electric component in response to the operation of the first and operation units to form the first and second electric power supply states, and retains the electric power supply to the second electric component, until the second operation unit is operated to form the second electric power cut-off state, despite a rider's operation of the first operation unit to form the first electric power cut-off state, after the retaining device started the electric power supply to the second electric component.Type: GrantFiled: April 10, 2015Date of Patent: November 28, 2017Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Hiroaki Amano, Takuya Sakamoto, Tadashi Miura
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Patent number: 9777463Abstract: A construction machine, comprising a hydraulic pump, a swing hydraulic motor, a swing electric motor, a delivery capacity regulating device, and a control unit which controls the driving/braking of the swing structure, 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.Type: GrantFiled: August 20, 2014Date of Patent: October 3, 2017Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.Inventors: Shiho Izumi, Shinya Imura, Hidetoshi Satake, Kouji Ishikawa, Tomoaki Kaneta, Hiroaki Amano, Shinji Nishikawa
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Patent number: 9725878Abstract: Provided is a hybrid-type construction machine including a swing device of the hydraulic-electric combined swing type and by which, in a work for which accurate swing operability is demanded like, for example, a crane work, a swing body is driven alone by the electric motor. The hybrid-type construction machine includes an engine, a hydraulic pump driven by the engine, a swing body, an electric motor for driving the swing body, and a hydraulic motor driven by the hydraulic pump for driving the swing body. The swing body is swung by simultaneous drive by the electric motor and the hydraulic motor. The hybrid-type construction machine includes a control apparatus having a work mode changeover unit by which an operator changes over a mode in response to an aspect of a work and an electric alone swing controlling unit configured to control the swing body to be swung by the electric motor alone.Type: GrantFiled: September 18, 2014Date of Patent: August 8, 2017Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Hiroaki Amano, Kouji Ishikawa, Hidetoshi Satake, Shinya Imura, Shinji Nishikawa, Tomoaki Kaneta, Shiho Izumi
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Publication number: 20170145658Abstract: Provided is a hybrid work machine capable of performing a warm-up operation on an electric storage device by charging and discharging while suppressing the occurrence of lug-down or over-revolution to an engine. The hybrid work machine includes: an engine; an assist motor mechanically connected to the engine, causing a discharge by generating a drive torque, and generating electric power by generating a brake torque; a hydraulic pump driven by a total torque of the engine and the assist motor; an electric storage device storing the electric power generated by the assist motor and supplying the electric power when the assist motor is discharged; and a controller outputting a torque command signal in order to control the drive torque or the brake torque of the assist motor.Type: ApplicationFiled: February 3, 2015Publication date: May 25, 2017Inventors: Shinya IMURA, Masafumi HITA, Hiroaki AMANO, Seiji ISHIDA, Ken TAKEUCHI, Itaru NAYA, Chiaki TAKAHASHI
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Patent number: 9593464Abstract: 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.Type: GrantFiled: December 20, 2013Date of Patent: March 14, 2017Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Shiho Izumi, Kouji Ishikawa, Shinya Imura, Shinji Nishikawa, Tomoaki Kaneta, Hiroaki Amano
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Publication number: 20160312440Abstract: 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.Type: ApplicationFiled: December 20, 2013Publication date: October 27, 2016Applicant: Hitachi Construction Machinery Co., Ltd.Inventors: Shiho IZUMI, Kouji ISHIKAWA, Shinya IMURA, Shinji NISHIKAWA, Tomoaki KANETA, Hiroaki AMANO
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Publication number: 20160298313Abstract: Provided is a hybrid-type construction machine including a swing device of the hydraulic-electric combined swing type and by which, in a work for which accurate swing operability is demanded like, for example, a crane work, a swing body is driven alone by the electric motor. The hybrid-type construction machine includes an engine, a hydraulic pump driven by the engine, a swing body, an electric motor for driving the swing body, and a hydraulic motor driven by the hydraulic pump for driving the swing body. The swing body is swung by simultaneous drive by the electric motor and the hydraulic motor. The hybrid-type construction machine includes a control apparatus having a work mode changeover unit by which an operator changes over a mode in response to an aspect of a work and an electric alone swing controlling unit configured to control the swing body to be swung by the electric motor alone.Type: ApplicationFiled: September 18, 2014Publication date: October 13, 2016Applicant: Hitachi Construction Machinery Co., Ltd.Inventors: Hiroaki AMANO, Kouji ISHIKAWA, Hidetoshi SATAKE, Shinya IMURA, Shinji NISHIKAWA, Tomoaki KANETA, Shiho IZUMI
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Publication number: 20160265195Abstract: 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.Type: ApplicationFiled: February 10, 2016Publication date: September 15, 2016Inventors: Shinya IMURA, Shinji NISHIKAWA, Masafumi HITA, Hiroaki AMANO
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Publication number: 20160002887Abstract: A construction machine, comprising a hydraulic pump, a swing hydraulic motor, a swing electric motor, a delivery capacity regulating device, and a control unit which controls the driving/braking of the swing structure, 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.Type: ApplicationFiled: August 20, 2014Publication date: January 7, 2016Inventors: Shiho IZUMI, Shinya IMURA, Hidetoshi SATAKE, Kouji ISHIKAWA, Tomoaki KANETA, Hiroaki AMANO, Shinji NISHIKAWA
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Publication number: 20150298628Abstract: A vehicle comprises first and second operation units operated to perform switching between an electric power supply state and an electric power cut-off state of respective first and second electric components and a retaining device which starts electric power supply to the second electric component in response to the operation of the first and operation units to form the first and second electric power supply states, and retains the electric power supply to the second electric component, until the second operation unit is operated to form the second electric power cut-off state, despite a rider's operation of the first operation unit to form the first electric power cut-off state, after the retaining device started the electric power supply to the second electric component.Type: ApplicationFiled: April 10, 2015Publication date: October 22, 2015Inventors: Hiroaki Amano, Takuya Sakamoto, Tadashi Miura
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Patent number: D377319Type: GrantFiled: December 12, 1995Date of Patent: January 14, 1997Assignee: Advantest CorporationInventors: Hiroaki Amano, Chizuru Arai