Patents by Inventor Hiroaki Take
Hiroaki Take 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: 20170204589Abstract: A construction machine includes a swing speed detection unit that detects an actual swing speed of an upper structure, a lever command speed calculation unit that calculates a lever command speed based on an operation amount of a swing lever for swinging the upper structure, a torque command value calculation unit that calculates a torque command value based on a command speed based on the calculated lever command speed, a command value output unit that outputs a command torque to a rotary motor generator based on the torque command value calculated by the torque command value calculation unit and the swing speed detected by the swing speed detection unit, and a command value output restriction unit that restricts the output of the torque command value from the command value output unit under predetermined conditions.Type: ApplicationFiled: January 20, 2016Publication date: July 20, 2017Inventors: Tsubasa Ohira, Tomotaka Imai, Hiroaki Take, Masaru Shizume
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Patent number: 9617713Abstract: A control device of an electric actuator adapted to perform a forward-reverse movement includes a control unit adapted to be operated in a forward direction or a reverse direction in accordance with the forward-reverse movement of the electric actuator. It also includes a pilot circuit, which is connected to the control unit and which generates a forward pilot pressure or a reverse pilot pressure in accordance with the forward operation or the reverse operation of the control unit. The control device has a differential pressure acquiring unit that acquires a differential pressure between a pilot pressure corresponding to an operation direction of the control unit and a pilot pressure, in a direction opposite to the operation direction, and it has a control command generator that generates a control command for controlling the electric actuator based on the differential pressure acquired by the differential pressure acquiring unit.Type: GrantFiled: May 11, 2011Date of Patent: April 11, 2017Assignee: Komatsu Ltd.Inventors: Hiroaki Take, Tadashi Kawaguchi, Jun Morinaga
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Patent number: 9550413Abstract: A hybrid work machine includes: an engine; a generator motor; a storage battery; a motor; a transformer; a target engine speed calculation unit configured to calculate a target engine speed based on at least an engine load and an output state of the generator motor; a generation control unit configured to output a generator requesting minimum engine speed; an engine controlling target engine speed calculation unit configured to calculate and output an engine controlling target engine speed based on the target engine speed and the generator requesting minimum engine speed; an engine control unit configured to control an engine speed based on the engine controlling target engine speed; and an assist control unit configured to set the target engine speed to the generator controlling target engine speed and control engine assist based on the generator controlling target engine speed and the generator motor speed.Type: GrantFiled: July 24, 2013Date of Patent: January 24, 2017Assignee: Komatsu Ltd.Inventor: Hiroaki Take
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Patent number: 9506223Abstract: A display device includes a display controller and displays a content based on display signals output from the display controller. The display controller includes: a gauge value converter that converts measurements of a plurality of devices displayed in a predetermined unit into gauge values with the same scale; and a maximum gauge value determiner that determines a maximum one of the gauge values converted by the gauge value converter, so as for the gauge value determined by the maximum gauge value determiner to be displayed.Type: GrantFiled: March 15, 2011Date of Patent: November 29, 2016Assignee: Komatsu Ltd.Inventors: Shimon Jinbo, Jun Morinaga, Hiroaki Take, Kouzou Suzuki
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Patent number: 9212467Abstract: The disclosed rotating parking brake control device obviates the need for an operator to operate an emergency-stop switch. A hybrid controller, to which a brake is connected, outputs a drive control signal to a rotating electric motor to control drive of an upper rotating body and also controls the brake by generating a brake release command signal and outputting the brake release command signal to the brake. A pump controller also generates a brake release command signal, and the brake release command signal generated by the pump controller is transmitted to the hybrid controller through an inter-controller signal line. The brake release command signal is outputted to the brake only when the brake release command signal is generated by the hybrid controller and the brake release command signal is transmitted from the pump controller through the inter-controller signal line.Type: GrantFiled: May 13, 2011Date of Patent: December 15, 2015Assignee: KOMATSU LTD.Inventors: Hiroaki Take, Jun Morinaga, Shuki Akushichi
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Publication number: 20150315766Abstract: A hybrid work machine includes: an engine; a generator motor; a storage battery; a motor; a transformer; a target engine speed calculation unit configured to calculate a target engine speed based on at least an engine load and an output state of the generator motor; a generation control unit configured to output a generator requesting minimum engine speed; an engine controlling target engine speed calculation unit configured to calculate and output an engine controlling target engine speed based on the target engine speed and the generator requesting minimum engine speed; an engine control unit configured to control an engine speed based on the engine controlling target engine speed; and an assist control unit configured to set the target engine speed to the generator controlling target engine speed and control engine assist based on the generator controlling target engine speed and the generator motor speed.Type: ApplicationFiled: July 24, 2013Publication date: November 5, 2015Applicant: KOMATSU LTD.Inventor: Hiroaki TAKE
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Publication number: 20130110348Abstract: A display device includes a display controller and displays a content based on display signals output from the display controller. The display controller includes: a gauge value converter that converts measurements of a plurality of devices displayed in a predetermined unit into gauge values with the same scale; and a maximum gauge value determiner that determines a maximum one of the gauge values converted by the gauge value converter, so as for the gauge value determined by the maximum gauge value determiner to be displayed.Type: ApplicationFiled: March 15, 2011Publication date: May 2, 2013Applicant: KOMATSU LTD.Inventors: Shimon Jinbo, Jun Morinaga, Hiroaki Take, Kouzou Suzuki
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Publication number: 20130090835Abstract: A construction machine storing a first torque diagram representing a region of a torque and a speed of the engine being able to be driven in a maximum torque region with respect to the engine speed and a second torque diagram in the first torque diagram, and controlling to change the engine speed on the second torque diagram by shifting from the first torque diagram to the second torque diagram based on an operation amount of an operation lever and/or a load applied and decrease the engine speed based on a decrease in load on the second torque diagram, the construction machine comprising: a controller stopping the engine control when a specific mode is selected and controlling so that the engine speed becomes a value in accordance with a setting amount of a fuel adjusting unit regardless of a change in the lever operation amount and/or the load applied.Type: ApplicationFiled: May 13, 2011Publication date: April 11, 2013Applicant: KOMATSU LTD.Inventors: Hiroaki Take, Noritaka Nagata
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Publication number: 20130073111Abstract: A control device of an electric actuator adapted to perform a forward-reverse movement includes a control unit adapted to be operated in a forward direction or a reverse direction in accordance with the forward-reverse movement of the electric actuator. It also includes a pilot circuit, which is connected to the control unit and which generates a forward pilot pressure or a reverse pilot pressure in accordance with the forward operation or the reverse operation of the control unit. The control device has a differential pressure acquiring unit that acquires a differential pressure between a pilot pressure corresponding to an operation direction of the control unit and a pilot pressure, in a direction opposite to the operation direction, and it has a control command generator that generates a control command for controlling the electric actuator based on the differential pressure acquired by the differential pressure acquiring unit.Type: ApplicationFiled: May 11, 2011Publication date: March 21, 2013Applicant: KOMATSU LTD.Inventors: Hiroaki Take, Tadashi Kawaguchi, Jun Morinaga
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Publication number: 20130060432Abstract: The disclosed rotating parking brake control device obviates the need for an operator to operate an emergency-stop switch. A hybrid controller, to which a brake is connected, outputs a drive control signal to a rotating electric motor to control drive of an upper rotating body and also controls the brake by generating a brake release command signal and outputting the brake release command signal to the brake. A pump controller also generates a brake release command signal, and the brake release command signal generated by the pump controller is transmitted to the hybrid controller through an inter-controller signal line. The brake release command signal is outputted to the brake only when the brake release command signal is generated by the hybrid controller and the brake release command signal is transmitted from the pump controller through the inter-controller signal line.Type: ApplicationFiled: May 13, 2011Publication date: March 7, 2013Applicant: KOMATSU LTD.Inventors: Hiroaki Take, Jun Morinaga, Shuki Akushichi