Patents by Inventor Yusuke Kitazawa

Yusuke Kitazawa 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).

  • Patent number: 10576959
    Abstract: A control apparatus for a hybrid vehicle is configured to control the hybrid vehicle. The control apparatus is provided with: an arithmetic operator configured to arithmetically operate a pulsation compensating torque for compensating a pulsation component; an arithmetic operation controller configured to control the arithmetic operator (i) to arithmetically operate the pulsation compensating torque in a first cycle in a period that does not include a vertex portion in which the pulsation compensating torque is locally maximal or locally minimal and (ii) to arithmetically operate the pulsation compensating torque in a second cycle, a length of which is shorter than that of the first cycle, in a period that includes the vertex portion; and a torque controller configured to control the electric motor to output a torque including the pulsation compensating torque arithmetically operated by the arithmetic operator.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: March 3, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuta Tsukada, Yusuke Kitazawa
  • Patent number: 10232842
    Abstract: The control apparatus executes a pulsation compensating control where pulsation compensating torque is calculated for suppressing torque pulsation of an internal combustion engine by a pulsation-compensating-torque calculating portion and an MG1 controlling portion controls a first motor generator to output the pulsation compensating torque, while executes a pressing control where pressing torque is calculated for preventing torque of a second motor generator from crossing 0 Nm by a pressing-torque calculating portion and an MG2 controlling portion controls the second motor generator to output the pressing torque.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: March 19, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Kawai, Yusuke Kitazawa
  • Publication number: 20180290659
    Abstract: A control apparatus for a hybrid vehicle includes: a first controller configured to perform first control of causing a rotation speed of an engine to approach a target rotation speed; and a second controller disposed separately from the first controller and configured to perform second control of reducing vibration due to fluctuation of the rotation speed of the engine by controlling a torque which is output from an electric motor connected to the engine. The second controller is configured to control the electric motor such that a torque associated with the second control is not output in a first frequency area which is a control frequency range of a transfer function of the first controller and to control the electric motor such that the torque associated with the second control is output in a second frequency area of a transfer function of the second controller which is higher than the first frequency area.
    Type: Application
    Filed: April 3, 2018
    Publication date: October 11, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuta Tsukada, Yu Miyahara, Yusuke Kitazawa, Tetsuhiro Maki
  • Publication number: 20180229711
    Abstract: A control apparatus for a hybrid vehicle is configured to control the hybrid vehicle. The control apparatus is provided with: an arithmetic operator configured to arithmetically operate a pulsation compensating torque for compensating a pulsation component; an arithmetic operation controller configured to control the arithmetic operator (i) to arithmetically operate the pulsation compensating torque in a first cycle in a period that does not include a vertex portion in which the pulsation compensating torque is locally maximal or locally minimal and (ii) to arithmetically operate the pulsation compensating torque in a second cycle, a length of which is shorter than that of the first cycle, in a period that includes the vertex portion; and a torque controller configured to control the electric motor to output a torque including the pulsation compensating torque arithmetically operated by the arithmetic operator.
    Type: Application
    Filed: February 14, 2018
    Publication date: August 16, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuta TSUKADA, Yusuke KITAZAWA
  • Patent number: 9746074
    Abstract: A vehicle transmission apparatus having a starting engagement friction element, which has friction plates and a hydraulic servo including a piston that is moved according to a supplied oil pressure to press the friction plates, which is controlled to be engaged when a vehicle is started by using at least a driving force of the internal combustion engine, and which transfers creep torque. A control device capable of receiving an accelerator operation amount signal and capable of outputting a command value that controls the oil pressure. The control device executes temporary increase control of temporarily increasing the command value, when the accelerator operation amount signal is turned on from a state where the accelerator operation amount signal is off and the command value is output so that the starting engagement friction element transfers the creep torque.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: August 29, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Yusuke Kitazawa, Kohei Tsuda
  • Publication number: 20170203754
    Abstract: The control apparatus executes a pulsation compensating control where pulsation compensating torque is calculated for suppressing torque pulsation of an internal combustion engine by a pulsation-compensating-torque calculating portion and an MG1 controlling portion controls a first motor generator to output the pulsation compensating torque, while executes a pressing control where pressing torque is calculated for preventing torque of a second motor generator from crossing 0 Nm by a pressing-torque calculating portion and an MG2 controlling portion controls the second motor generator to output the pressing torque.
    Type: Application
    Filed: January 9, 2017
    Publication date: July 20, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi KAWAI, Yusuke KITAZAWA
  • Publication number: 20140309898
    Abstract: A vehicle transmission apparatus having a starting engagement friction element, which has friction plates and a hydraulic servo including a piston that is moved according to a supplied oil pressure to press the friction plates, which is controlled to be engaged when a vehicle is started by using at least a driving force of the internal combustion engine, and which transfers creep torque. A control device capable of receiving an accelerator operation amount signal and capable of outputting a command value that controls the oil pressure. The control device executes temporary increase control of temporarily increasing the command value, when the accelerator operation amount signal is turned on from a state where the accelerator operation amount signal is off and the command value is output so that the starting engagement friction element transfers the creep torque.
    Type: Application
    Filed: January 25, 2013
    Publication date: October 16, 2014
    Applicant: AISIN AW CO., LTD
    Inventors: Yusuke Kitazawa, Kohei Tsuda
  • Patent number: 6753893
    Abstract: A thermal head has a longitudinal substrate; a heat-retention layer made of a heat-retaining material, having at least a sticking-out section lying on one main surface of the substrate in a longitudinal direction at a constant width; a heating-resistor member made of a resistive material, formed at least on the sticking-out section of the heat-retention layer at a predetermined thickness; a common electrode provided as touching the heating-resistor member; a plurality of separated electrodes provided as facing a tip of the common electrode with a gap, at least an edge of each separated electrode touching the heating-resistor member, another edge of each separated electrode being connected to a driver circuit; and a protective layer formed on the heating-resistor member. A heating-resistor member portion provided on to the gap between the common electrode and the separated electrodes functions as a recording section.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: June 22, 2004
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Hokuto Electronics Corp.
    Inventor: Yusuke Kitazawa
  • Patent number: 6201557
    Abstract: A process for producing a protective layer or a primer layer for a heat-generating resistor for a thermal head by sputtering using a target comprising a sinter of a silicon nitride/silicon dioxide/magnesium oxide powder. By regulating the particle diameter of the powder, the target is prevented from suffering partial peeling during the sputtering.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: March 13, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yusuke Kitazawa, Yasuhisa Takamura