Patents by Inventor Kohei Tsuda

Kohei Tsuda 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).

  • Publication number: 20210146769
    Abstract: A control device with an electronic control unit that is configured to perform specific supply control, the specific supply control driving at least one of the rotating electrical machine and the internal combustion engine in a neutral state, and supplying hydraulic pressure to an engagement operating part of a target engagement device with at least one of the rotating electrical machine and the internal combustion engine being driven, the automatic transmission not transmitting power in the neutral state, and the target engagement device being one of the plurality of transmission engagement devices.
    Type: Application
    Filed: July 17, 2018
    Publication date: May 20, 2021
    Applicant: AISIN AW CO., LTD.
    Inventors: Tomohiro ONOUCHI, Kohei TSUDA, Yuki NAGANO
  • Publication number: 20200023726
    Abstract: A control device that controls a vehicle drive device in which an engagement device, a rotating electrical machine, and an automatic transmission are arranged in this order from an input side on a power transmission path connecting an input drivingly coupled to an internal combustion engine and an output drivingly coupled to a wheel, the control device including: an electronic control unit configured to operate when starting of the internal combustion engine and downshifting are performed in parallel in a state in which the internal combustion engine is stopped and the engagement device is disengaged so that torque of the rotating electrical machine is transmitted to the wheel.
    Type: Application
    Filed: January 12, 2018
    Publication date: January 23, 2020
    Applicant: AISIN AW CO., LTD.
    Inventors: Kohei TSUDA, Takashi YOSHIDA
  • Patent number: 10507837
    Abstract: A control device that controls a vehicle drive transfer device in which a speed change device that includes a plurality of engagement devices and that selectively establishes one of a plurality of shift speeds with different speed ratios in accordance with a state of engagement of the plurality of engagement devices is provided in a power transfer path that connects between a drive force source and wheels.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: December 17, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Shoichi Ishida, Kohei Tsuda, Keiichirou Kusabe
  • Patent number: 10414403
    Abstract: A control device that controls a vehicle drive device in which an input member, an engagement device, a shift input member, a transmission device, and an output member are disposed in this order on a power transmission path connecting an internal combustion engine and wheels, the control device includes an electronic control unit.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: September 17, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Kohei Tsuda, Shoichi Ishida, Norihiro Muto
  • Patent number: 10363807
    Abstract: A control device for performing start assist control for an internal combustion engine includes: a first start assist processing unit that executes a first start assist process that brings a first engagement device into slip engagement at a first engagement pressure while increasing a torque generated by a rotating electrical machine; and a second start assist processing unit that increases, when the first start assist process fails to start the internal combustion engine, an engagement pressure of the first engagement device to a second engagement pressure higher than the first engagement pressure while increasing the torque generated by the rotating electrical machine. The second start assist processing unit determines the second engagement pressure on the basis of a rotational speed of the internal combustion engine in the first start assist process.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: July 30, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Hirokazu Kobayashi, Takashi Yoshida, Kohei Tsuda
  • Patent number: 10322715
    Abstract: A control device that includes an electronic control unit that is configured to, in a case where a request to start the internal combustion engine is made while a downshift for changing a speed ratio of the speed change device so that the speed ratio after shifting is higher than the speed ratio before shifting is being performed in the electric drive state, perform the first start control after the downshift is completed.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: June 18, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Kohei Tsuda, Takashi Yoshida, Nao Katagiri
  • Patent number: 10300908
    Abstract: A control device that includes an electronic control unit that causes a rotational speed of the rotating electric machine to change according to a predetermined first change pattern after the rotational speed of the rotating electric machine changes from a pre-shifting synchronous rotational speed in association with progress of the shifting operation until reaching a first synchronous range that is determined on the basis of a rotational speed of the internal combustion engine, the pre-shifting synchronous rotational speed being the rotational speed of the rotating electric machine in a shift speed established before the shifting operation is started.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: May 28, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Shoichi Ishida, Kohei Tsuda, Keiichirou Kusabe
  • Patent number: 10279795
    Abstract: A control device for controlling a vehicle drive system in which a first engagement device, a rotating electric machine, and a second engagement device are provided in a power transfer path connecting an internal combustion engine to wheels and are arranged sequentially from an internal combustion engine side, the control device including an electronic control unit.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: May 7, 2019
    Assignee: AISIN AW CO., LTD.
    Inventors: Kohei Tsuda, Takashi Yoshida
  • Publication number: 20190039602
    Abstract: A control device for controlling a vehicle drive device, as a control target, including a transfer clutch device, a rotary electric machine, and a transmission device that includes a plurality of shift clutch devices of which states of engagement are controlled in a shifting operation, on a power transfer path connecting an internal combustion engine to a wheel, the control device including an electronic control unit.
    Type: Application
    Filed: September 30, 2016
    Publication date: February 7, 2019
    Applicant: AISIN AW CO., LTD.
    Inventors: Keiichirou KUSABE, Kohei TSUDA, Tomohiro ONOUCHI
  • Publication number: 20180208047
    Abstract: A control device that controls a vehicle drive transmission device including a speed change device disposed on a power transmission path connecting an internal combustion engine and wheels, and an engagement device disposed between the internal combustion engine and the speed change device, the control device including an electronic control unit.
    Type: Application
    Filed: September 8, 2016
    Publication date: July 26, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Shoichi ISHIDA, Kohei TSUDA, Norihiro MUTO
  • Publication number: 20180208202
    Abstract: To avoid occurrence of difference in level of torque in a case where direction of relative rotation between internal combustion engine and rotary electric machine is reversed, in starting internal combustion engine with shift clutch device brought into direct engagement state. Control device controls vehicle drive device including transfer clutch device, rotary electric machine, and transmission device each disposed on power transfer path connecting internal combustion engine to wheels.
    Type: Application
    Filed: September 8, 2016
    Publication date: July 26, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Hirokazu KOBAYASHI, Kohei TSUDA, Keiichirou KUSABE, Takashi YOSHIDA
  • Publication number: 20180194355
    Abstract: A control device that controls a vehicle drive device in which an input member, an engagement device, a shift input member, a transmission device, and an output member are disposed in this order on a power transmission path connecting an internal combustion engine and wheels, the control device includes an electronic control unit.
    Type: Application
    Filed: September 8, 2016
    Publication date: July 12, 2018
    Applicant: Aisin Aw Co., Ltd.
    Inventors: Kohei TSUDA, Shoichi ISHIDA, Norihiro MUTO
  • Patent number: 9919698
    Abstract: A control device for a vehicle driving device which controls the vehicle driving device provided with a particular engagement device, a rotary electric machine, and a transmission apparatus disposed in a power transmission path coupling an internal combustion engine with wheels in order from the internal combustion engine side, wherein the transmission apparatus includes a plurality of engagement devices, and selectively forms a plurality of transmission shift stages different in transmission shift ratio according to a state of engagement of the plurality of engagement devices.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: March 20, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Yoichi Tajima, Kohei Tsuda
  • Patent number: 9914447
    Abstract: A control device for a vehicle drive apparatus, the vehicle drive apparatus including an output shaft connected to an engine; an input shaft connected to a wheel; an electric motor that generates rotational torque of the wheel; and a hydraulic clutch that connects the output shaft to the input shaft when placed in an engaged state, and disconnects the output shaft from the input shaft when placed in a released state.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: March 13, 2018
    Assignee: AISIN AW CO., LTD.
    Inventors: Takashi Yoshida, Kohei Tsuda
  • Publication number: 20180056969
    Abstract: A control device for controlling a vehicle drive system in which a first engagement device, a rotating electric machine, and a second engagement device are provided in a power transfer path connecting an internal combustion engine to wheels and are arranged sequentially from an internal combustion engine side, the control device including an electronic control unit.
    Type: Application
    Filed: March 31, 2016
    Publication date: March 1, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Kohei TSUDA, Takashi YOSHIDA
  • Publication number: 20180043880
    Abstract: A control device that includes an electronic control unit that causes a rotational speed of the rotating electric machine to change according to a predetermined first change pattern after the rotational speed of the rotating electric machine changes from a pre-shifting synchronous rotational speed in association with progress of the shifting operation until reaching a first synchronous range that is determined on the basis of a rotational speed of the internal combustion engine, the pre-shifting synchronous rotational speed being the rotational speed of the rotating electric machine in a shift speed established before the shifting operation is started.
    Type: Application
    Filed: March 29, 2016
    Publication date: February 15, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Shoichi ISHIDA, Kohei TSUDA, Keiichirou KUSABE
  • Publication number: 20180037220
    Abstract: A control device that includes an electronic control unit that is configured to, in a case where a request to start the internal combustion engine is made while a downshift for changing a speed ratio of the speed change device so that the speed ratio after shifting is higher than the speed ratio before shifting is being performed in the electric drive state, perform the first start control after the downshift is completed.
    Type: Application
    Filed: March 30, 2016
    Publication date: February 8, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Kohei TSUDA, Takashi YOSHIDA, Nao KATAGIRI
  • Publication number: 20180009308
    Abstract: A control device for performing start assist control for an internal combustion engine includes: a first start assist processing unit that executes a first start assist process that brings a first engagement device into slip engagement at a first engagement pressure while increasing a torque generated by a rotating electrical machine; and a second start assist processing unit that increases, when the first start assist process fails to start the internal combustion engine, an engagement pressure of the first engagement device to a second engagement pressure higher than the first engagement pressure while increasing the torque generated by the rotating electrical machine. The second start assist processing unit determines the second engagement pressure on the basis of a rotational speed of the internal combustion engine in the first start assist process.
    Type: Application
    Filed: March 18, 2016
    Publication date: January 11, 2018
    Applicant: AISIN AW CO., LTD.
    Inventors: Hirokazu KOBAYASHI, Takashi YOSHIDA, Kohei TSUDA
  • Publication number: 20170327122
    Abstract: A control device that controls a vehicle drive transfer device in which a speed change device that includes a plurality of engagement devices and that selectively establishes one of a plurality of shift speeds with different speed ratios in accordance with a state of engagement of the plurality of engagement devices is provided in a power transfer path that connects between a drive force source and wheels.
    Type: Application
    Filed: December 25, 2015
    Publication date: November 16, 2017
    Applicant: AISIN AW CO., LTD.
    Inventors: Shoichi ISHIDA, Kohei TSUDA, Keiichirou KUSABE
  • Patent number: 9815455
    Abstract: A control device for a vehicle drive device having a speed change mechanism that attains a predetermined shift speed by engaging multiple engagement elements. The control device predicts an amount of heat generation and determines whether any jumping shift from the current shift speed to the shift speed that is the multiple shift speeds higher or lower than the current shift speed can be permitted or not between the current shift speed and the target shift speed, and if the jumping shift can be permitted, the control unit performs the jumping shift and controls the speed change mechanism so as to shift the shift speed from the current shift speed to the target shift speed.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: November 14, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Kohei Tsuda, Tomohiro Onouchi, Keiichirou Kusabe