Patents by Inventor Jin Izawa
Jin Izawa 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: 20220331950Abstract: A robot device of the present disclosure includes at least one artificial muscle that operates by being supplied with liquid; and a liquid supply device that supplies and discharges the liquid to/from the artificial muscle, and the liquid supply device includes a liquid storage part that stores the liquid; a pump that sucks the liquid from the liquid storage part and discharges the liquid; a pressure regulating device that includes a spool and an electromagnetic part that allows the spool to move, and that generates drive pressure for the artificial muscle by regulating source pressure from the pump side, and regulates the source pressure by balancing at least a force given to the spool from the electromagnetic part and a force given to the spool by action of the drive pressure; and a control device that applies a current to the electromagnetic part of the pressure regulating device so that the drive pressure reaches target pressure.Type: ApplicationFiled: September 14, 2020Publication date: October 20, 2022Applicant: AISIN CORPORATIONInventors: Masahiro ASAI, Tomomi ISHIKAWA, Tomonari OKAMOTO, Shinya ICHIKAWA, Noriomi FUJII, Ryo TAKADA, Jin IZAWA, Hiroki TAKATA, Hiroshi YAMADA
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Patent number: 10451180Abstract: A control device that includes an electronic control unit that is configured to: detect an actual current value flowing through the solenoid valve; receive a current command value and the actual current value detected and generate a primary command voltage value while feeding back the current command value on the basis of the actual current value; calculate a dither command voltage value to cause a periodic voltage oscillation; filter the actual current value detected to remove a frequency corresponding to a period of the dither command voltage value and output the filtered actual current value; generate a secondary command voltage value by superimposing the dither command voltage value generated on the primary command voltage value generated; convert the secondary command voltage value generated into a PWM signal; and generate, on the basis of the PWM signal generated, an application voltage to be applied to the solenoid valve.Type: GrantFiled: July 19, 2016Date of Patent: October 22, 2019Assignee: AISIN AW CO., LTD.Inventors: Yasuhiro Ishihara, Yasuhiko Kobayashi, Tetsuro Kuwano, Jin Izawa
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Publication number: 20180163857Abstract: A control device that includes an electronic control unit that is configured to: detect an actual current value flowing through the solenoid valve; receive a current command value and the actual current value detected and generate a primary command voltage value while feeding back the current command value on the basis of the actual current value; calculate a dither command voltage value to cause a periodic voltage oscillation; filter the actual current value detected to remove a frequency corresponding to a period of the dither command voltage value and output the filtered actual current value; generate a secondary command voltage value by superimposing the dither command voltage value generated on the primary command voltage value generated; convert the secondary command voltage value generated into a PWM signal; and generate, on the basis of the PWM signal generated, an application voltage to be applied to the solenoid valve.Type: ApplicationFiled: July 19, 2016Publication date: June 14, 2018Applicant: AISIN AW CO., LTD.Inventors: Yasuhiro ISHIHARA, Yasuhiko KOBAYASHI, Tetsuro KUWANO, Jin IZAWA
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Patent number: 9845870Abstract: A lock-up clutch control device that sets a hydraulic pressure command value for a lock-up clutch as a starting device together with a pump impeller coupled to a motor of a vehicle and a turbine runner coupled to an input shaft of a transmission such that an actual rotational speed difference between the motor and the input shaft coincides with a target slip speed that matches a state of the vehicle, and that controls the lock-up clutch based on the hydraulic pressure command value.Type: GrantFiled: January 17, 2014Date of Patent: December 19, 2017Assignee: AISIN AW CO., LTD.Inventors: Keiichirou Kusabe, Yasuhiko Kobayashi, Jin Izawa
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Publication number: 20150330505Abstract: A lock-up clutch control device that sets a hydraulic pressure command value for a lock-up clutch as a starting device together with a pump impeller coupled to a motor of a vehicle and a turbine runner coupled to an input shaft of a transmission such that an actual rotational speed difference between the motor and the input shaft coincides with a target slip speed that matches a state of the vehicle, and that controls the lock-up clutch based on the hydraulic pressure command value.Type: ApplicationFiled: January 17, 2014Publication date: November 19, 2015Inventors: Keiichirou KUSABE, Yasuhiko KOBAYASHI, Jin IZAWA
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Publication number: 20140330469Abstract: A control device for a hybrid vehicle performs start control for an internal combustion engine. The start control includes (i) transition control that controls the transition of first and second engagement devices between a direct engagement state, a slip engagement state and a disengaged state, and (ii) rotational speed control that controls rotational speed of a rotary electric machine. The timing of the transition control and rotational speed control reduces the starting time of the internal combustion engine, and/or suppresses transmission of torque shock to wheels when the first engagement device transitions from the slip engagement state to the direct engagement state.Type: ApplicationFiled: November 28, 2012Publication date: November 6, 2014Inventors: Takashi Yoshida, Yomei Hakumura, Yoichi Tajima, Jin Izawa
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Patent number: 8587237Abstract: A control device configured with an external input estimator that reduces a vibration component of a rotational speed of the power transfer system at a rotational speed of the rotary electric machine and estimates transfer system input torque on the basis of the rotational speed of the rotary electric machine, and that estimates external input torque by subtracting at least output torque of the rotary electric machine from the transfer system input torque. A low-vibration speed calculator calculates a low-vibration rotational speed on the basis of the external input torque and vehicle required torque. A rotational speed controller calculates feedback command torque that matches the rotational speed of the rotary electric machine with the low-vibration rotational speed. A torque command value calculator calculates an output torque command value on the basis of the vehicle required torque and the feedback command torque.Type: GrantFiled: September 21, 2011Date of Patent: November 19, 2013Assignee: Aisin AW Co., Ltd.Inventors: Yasuhiko Kobayashi, Jin Izawa
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Patent number: 8506449Abstract: A control system configured with a speed change mechanism. When starting combustion in an internal combustion engine under a combustion-stopped vehicle running condition, the combustion in the internal combustion engine is stopped, the speed change mechanism forms the one-way transmission speed, and the output member rotates. A rotational speed feedback control is executed that sets a value that multiplies a rotational speed of the output member by a speed ratio of the one-way transmission speed as a reference rotational speed of the input member, sets a starting rotational speed, and controls a rotary electric machine such that the rotational speed of the input member matches the target rotational speed. During execution of the rotational speed feedback control, a start control is performed that increases engagement pressure of the clutch to increase a rotational speed of the internal combustion engine and start combustion in the internal combustion engine.Type: GrantFiled: March 3, 2011Date of Patent: August 13, 2013Assignee: Aisin AW Co., Ltd.Inventors: Takashi Yoshida, Yomei Hakumura, Jin Izawa, Yoichi Tajima
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Patent number: 8446118Abstract: A rotary electric machine control device includes a positive/negative determination section that determines whether an output torque of the rotary electric machine is positive or negative; a correction parameter setting section that sets as a correction parameter a phase difference of a sinusoidal ripple correction wave for reducing torque ripple of the rotary electric machine with respect to a magnetic pole position of the rotary electric machine depending on whether the output torque is positive or negative; and a correction wave generation section that generates the ripple correction wave on the basis of the correction parameter.Type: GrantFiled: January 22, 2010Date of Patent: May 21, 2013Assignee: Aisin AW Co., Ltd.Inventors: Seiichi Kinugasa, Jin Izawa, Kazuyuki Izawa, Kazuo Aoki
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Patent number: 8405335Abstract: A rotary electric machine control system includes a battery electric power calculation unit for calculating battery electric power that is supplied from the battery; a torque limitation unit for limiting an output torque of the rotary electric machine; and a battery electric power abrupt variation estimation unit for estimating that the battery electric power is in an abrupt variation state in which the battery electric power is varying abruptly on the basis of at least one of a variation rate of the battery electric power and a variation rate of a rotational speed of the rotary electric machine.Type: GrantFiled: December 1, 2008Date of Patent: March 26, 2013Assignee: Aisin AW Co., Ltd.Inventors: Takashi Yoshida, Subrata Saha, Daisuke Ogino, Jin Izawa
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Patent number: 8373367Abstract: A dynamo-electric machine control system including a dynamo-electric machine and an inverter that is interposed between a battery and the dynamo-electric machine and that controls a current flowing through the dynamo-electric machine, wherein a rotation speed and an output torque of the dynamo-electric machine are controlled by the inverter, the dynamo-electric machine control system includes a battery power deriving unit that derives a battery power to be supplied from the battery when the dynamo-electric machine is operated at the rotation speed and the output torque; a limit power determining unit that variably determines a limit power, which is a maximum allowable value of the battery power, in accordance with a battery voltage; and a torque limiting unit that limits the torque of the dynamo-electric machine such that the battery power derived by the battery power deriving unit does not exceed the limit power.Type: GrantFiled: July 1, 2009Date of Patent: February 12, 2013Assignee: Aisin AW Co., Ltd.Inventors: Takashi Yoshida, Subrata Saha, Daisuke Ogino, Jin Izawa, Kazuo Aoki
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Patent number: 8281886Abstract: An electric motor control device includes an inverter that supplies an output of a primary-side DC power supply to an electric motor to control driving of the electric motor; a converter that includes a voltage increasing power supply device that increases a voltage of the primary-side DC power supply to supply the inverter with the increased voltage as a secondary voltage, and a regenerative power supply device that reversely supplies regenerative power from the inverter to the primary-side DC power supply; a secondary-side target voltage determination unit; a converter control unit; and an electric motor control unit.Type: GrantFiled: October 31, 2008Date of Patent: October 9, 2012Assignee: Aisin AW Co., Ltd.Inventors: Subrata Saha, Takashi Yoshida, Daisuke Ogino, Jin Izawa, Yoshinori Oono
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Patent number: 8253359Abstract: A control system includes an electric rotating machine; a driving circuit that is connected to a DC power supply, the driving circuit includes a frequency conversion unit configured such that, when the electric rotating machine is to be driven in a power running mode, the frequency conversion unit converts an output of the DC power supply into AC electric power, and when the electric rotating machine is to be driven in a regenerative operation mode, the frequency conversion unit converts an output of the electric rotating machine into DC electric power; and a control unit that controls the driving circuit, wherein the control unit judges whether a connection between the DC power supply and the driving circuit is being maintained, and is configured such that, when the connection is not being maintained, regenerative electric power generated by the electric rotating machine is reduced by controlling the driving circuit.Type: GrantFiled: March 6, 2009Date of Patent: August 28, 2012Assignee: Aisin AW Co., Ltd.Inventors: Kazuhiro Tanaka, Daisuke Ogino, Subrata Saha, Jin Izawa
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Patent number: 8188702Abstract: A rotating electrical machine control system includes a frequency converting portion that is interposed between a rotating electrical machine for driving a vehicle and a DC power source for supplying electric power to the rotating electrical machine, and that converts an output of the DC power source to an AC output at least during a powering operation of the rotating electrical machine; a voltage converting portion that is interposed between the DC power source and the frequency converting portion, and that boosts the output of the DC power source based on a boost command value which is set according to a target torque and a rotational speed of the rotating electrical machine; and a control portion for controlling the frequency converting portion and the voltage converting portion.Type: GrantFiled: July 1, 2009Date of Patent: May 29, 2012Assignee: Aisin AW Co., Ltd.Inventors: Takashi Yoshida, Subrata Saha, Daisuke Ogino, Jin Izawa, Yoshinori Ono
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Publication number: 20120081051Abstract: A control device configured with an external input estimator that reduces a vibration component of a rotational speed of the power transfer system at a rotational speed of the rotary electric machine and estimates transfer system input torque on the basis of the rotational speed of the rotary electric machine, and that estimates external input torque by subtracting at least output torque of the rotary electric machine from the transfer system input torque. A low-vibration speed calculator calculates a low-vibration rotational speed on the basis of the external input torque and vehicle required torque. A rotational speed controller calculates feedback command torque that matches the rotational speed of the rotary electric machine with the low-vibration rotational speed. A torque command value calculator calculates an output torque command value on the basis of the vehicle required torque and the feedback command torque.Type: ApplicationFiled: September 21, 2011Publication date: April 5, 2012Applicant: AISIN AW CO., LTD.Inventors: Yasuhiko Kobayashi, Jin Izawa
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Publication number: 20120083953Abstract: A control device capable of executing damping control of outputting a damping torque command that suppresses vibration of a rotational speed of a rotating electrical machine caused at least by elastic vibration of a power transmission mechanism. This is accomplished by using feedback control based on the rotational speed of the rotating electrical machine. The control device executes the damping control by a direct-coupling damping controller when the engagement state of the engagement device is a direct-coupling engagement state in which there is no rotational speed difference between engagement members, and executes the damping control by a non-direct-coupling damping controller different from the direct-coupling damping controller in a case where the engagement state of the engagement device is a non-direct-coupling engagement state other than the direct-coupling engagement state.Type: ApplicationFiled: September 22, 2011Publication date: April 5, 2012Applicant: AISIN AW CO., LTD.Inventors: Jin IZAWA, Yasuhiko KOBAYASHI
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Patent number: 8125169Abstract: A rotating electrical machine control system includes a frequency converting portion that is interposed between a rotating electrical machine for driving a vehicle and a DC power source for supplying electric power to the rotating electrical machine, and that converts an output of the DC power source to an AC output at least during powering operation of the rotating electrical machine; a voltage converting portion that is interposed between the DC power source and the frequency converting portion, and that boosts the output of the DC power source based on a boost command value which is set according to a target torque and a rotational speed of the rotating electrical machine; and a control portion for controlling the frequency converting portion and the voltage converting portion.Type: GrantFiled: July 1, 2009Date of Patent: February 28, 2012Assignee: Aisin AW Co., Ltd.Inventors: Daisuke Ogino, Takashi Yoshida, Subrata Saha, Jin Izawa, Norio Tomiya
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Publication number: 20110245034Abstract: A control system configured with a speed change mechanism. When starting combustion in an internal combustion engine under a combustion-stopped vehicle running condition, the combustion in the internal combustion engine is stopped, the speed change mechanism forms the one-way transmission speed, and the output member rotates. A rotational speed feedback control is executed that sets a value that multiplies a rotational speed of the output member by a speed ratio of the one-way transmission speed as a reference rotational speed of the input member, sets a starting rotational speed, and controls a rotary electric machine such that the rotational speed of the input member matches the target rotational speed. During execution of the rotational speed feedback control, a start control is performed that increases engagement pressure of the clutch to increase a rotational speed of the internal combustion engine and start combustion in the internal combustion engine.Type: ApplicationFiled: March 3, 2011Publication date: October 6, 2011Applicant: AISIN AW CO., LTD.Inventors: Takashi YOSHIDA, Yomei HAKUMURA, Jin IZAWA, Yoichi TAJIMA
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Patent number: 8002057Abstract: A hybrid drive system includes an input member connected to an engine; an output member connected to a wheel; a first rotating electric machine; a second rotating electric machine; a differential gearing; a controller that controls the first rotating electric machine and the second rotating electric machine; and an electric power supplier that supplies the first rotating electric machine and the second rotating electric machine with electric power.Type: GrantFiled: March 6, 2009Date of Patent: August 23, 2011Assignee: Aisin AW Co., Ltd.Inventors: Kazuhiro Tanaka, Jin Izawa, Yoshinori Oono, Kazuo Aoki
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Patent number: 7999499Abstract: A rotating electrical machine control system includes a rotating electrical machine, a frequency conversion portion, a voltage conversion portion, a torque limitation portion, and an abnormality detection portion. The torque limitation portion limits generation of a positive torque in a region of less than a rotational speed lower limit threshold value where a rotational speed of the rotating electrical machine is less than zero, and sets a region in which the positive torque is generated to a region of the rotational speed lower limit threshold value or greater, and the torque limitation portion limits generation of a negative torque in a region of greater than a rotational speed upper limit threshold value where the rotational speed of the rotating electrical machine is greater than zero, and sets a region in which the negative torque is generated to a region of the rotational speed upper limit threshold value or less.Type: GrantFiled: March 6, 2009Date of Patent: August 16, 2011Assignee: Aisin AW Co., Ltd.Inventors: Kazuhiro Tanaka, Jin Izawa, Yoshinori Oono, Kazuo Aoki