Patents by Inventor Takuro Hirano

Takuro Hirano 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: 9963141
    Abstract: A hybrid vehicle control device is provided with at least one controller programmed to control outputs of the engine and the electric motor, an engagement and disengagement of the clutch, and a transmission ratio of the continuously variable transmission in accordance with a driving state. The at least one controller is further programmed to restart the engine while maintaining a released state of the clutch, and downshift the continuously variable transmission to a predetermined transmission ratio for passing over the level difference upon determining that the level difference is present while traveling by a drive force of the motor with the clutch released and the engine stopped.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: May 8, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akihiro Yamamoto, Morihiro Nagamine, Akira Takano, Shintaro Oshio, Yoshihisa Kodama, Takuro Hirano, Yukifumi Otsuka
  • Patent number: 9758158
    Abstract: A hybrid vehicle control device is provided with at least one controller that controls the outputs of the engine and of the motor according to the driving state, the engagement and disengagement of the clutch, and the transmission ratio of the continuously variable transmission. The at least one controller is programmed to start the engine and forcibly downshift the continuously variable transmission to a transmission ratio with which it is possible to start on an uphill road upon determining that the vehicle is on an uphill road while in an electric vehicle mode in which it is possible to travel by the drive force of the motor with the clutch released and the engine stopped.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: September 12, 2017
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akihiro Yamamoto, Morihiro Nagamine, Akira Takano, Shintaro Oshio, Yoshihisa Kodama, Takuro Hirano, Yukifumi Otsuka
  • Patent number: 9616883
    Abstract: A hybrid vehicle includes a mechanical oil pump that is driven by an engine and an electric oil pump that is driven by an electric motor, and is configured to activate the electric oil pump when traveling in an electric traveling mode, in which the engine is stopped and traveling is executed by a driving force from a driving motor.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: April 11, 2017
    Assignees: Nissan Motor Co., Ltd., JATCO LTD
    Inventors: Morihiro Nagamine, Akira Takano, Shintaro Oshio, Takuro Hirano, Yoshihisa Kodama, Akihiro Yamamoto
  • Publication number: 20170066437
    Abstract: A hybrid vehicle control device is provided with at least one controller programmed to control outputs of the engine and the electric motor, an engagement and disengagement of the clutch, and a transmission ratio of the continuously variable transmission in accordance with a driving state. The at least one controller is further programmed to restart the engine while maintaining a released state of the clutch, and downshift the continuously variable transmission to a predetermined transmission ratio for passing over the level difference upon determining that the level difference is present while traveling by a drive force of the motor with the clutch released and the engine stopped.
    Type: Application
    Filed: January 28, 2015
    Publication date: March 9, 2017
    Inventors: Akihiro YAMAMOTO, Morihiro NAGAMINE, Akira TAKANO, Shintaro OSHIO, Yoshihisa KODAMA, Takuro HIRANO, Yukifumi OTSUKA
  • Publication number: 20170015301
    Abstract: A hybrid vehicle control device is provided with at least one controller that controls the outputs of the engine and of the motor according to the driving state, the engagement and disengagement of the clutch, and the transmission ratio of the continuously variable transmission. The at least one controller is programmed to start the engine and forcibly downshift the continuously variable transmission to a transmission ratio with which it is possible to start on an uphill road upon determining that the vehicle is on an uphill road while in an electric vehicle mode in which it is possible to travel by the drive force of the motor with the clutch released and the engine stopped.
    Type: Application
    Filed: January 28, 2015
    Publication date: January 19, 2017
    Inventors: Akihiro YAMAMOTO, Morihiro NAGAMINE, Akira TAKANO, Shintaro OSHIO, Yoshihisa KODAMA, Takuro HIRANO, Yukifumi OTSUKA
  • Patent number: 9545912
    Abstract: A hybrid vehicle mode-switching control device for a hybrid vehicle controls that an output of an engine and/or motor in response to a mode-switch request. In a case of a difference between an actual transmission gear ratio and a target transmission gear ratio, a deficit with respect to the requested drive power occurs that causes discomfort to the driver. The drive power surplus or deficit caused by the transmission gear ratio deviation can eliminated by correcting of the motor torque and/or the engine torque by a correction amount necessary to eliminate the surplus or deficit of drive power. In this way, the lack of drive power due to the transmission ratio deviation and the driver's sense of discomfort can be eliminated.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: January 17, 2017
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akira Takano, Shintaro Oshio, Yoshihisa Kodama, Takuro Hirano
  • Publication number: 20160009273
    Abstract: A hybrid vehicle includes a mechanical oil pump that is driven by an engine and an electric oil pump that is driven by an electric motor, and is configured to activate the electric oil pump when traveling in an electric traveling mode, in which the engine is stopped and traveling is executed by a driving force from a driving motor.
    Type: Application
    Filed: March 14, 2014
    Publication date: January 14, 2016
    Applicants: NISSAN MOTOR CO., LTD., JATCO LTD
    Inventors: Morihiro NAGAMINE, Akira TAKANO, Shintaro OSHIO, Takuro HIRANO, Yoshihisa KODAMA, Akihiro YAMAMOTO
  • Publication number: 20150283993
    Abstract: A hybrid vehicle mode-switching control device for a hybrid vehicle controls that an output of an engine and/or motor in response to a mode-switch request. In a case of a difference between an actual transmission gear ratio and a target transmission gear ratio, a deficit with respect to the requested drive power occurs that causes discomfort to the driver. The drive power surplus or deficit caused by the transmission gear ratio deviation can eliminated by correcting of the motor torque and/or the engine torque by a correction amount necessary to eliminate the surplus or deficit of drive power. In this way, the lack of drive power due to the transmission ratio deviation and the driver's sense of discomfort can be eliminated.
    Type: Application
    Filed: October 30, 2013
    Publication date: October 8, 2015
    Inventors: Akira Takano, Shintaro Oshio, Yoshihisa Kodama, Takuro Hirano
  • Patent number: 5735365
    Abstract: A rack and pinion are housed in a gear box, a valve sleeve that is joined to the pinion being housed in a valve housing such that the sleeve is free to rotate. A mechanism is provided that joins the gear box and valve housing in any desired relative rotation position. As the gear box and valve housing are formed independently, they may be formed by different manufacturing methods, and replacement of either of them is also easy. Further, an oil pressure port provided at a fixed position in the valve housing may be disposed at any desired rotation angle by selecting the relative rotation position of the gear box and valve housing.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: April 7, 1998
    Assignee: Kayaba Kogyo Kabushiki Kaisha
    Inventors: Masayuki Sako, Takuro Hirano, Shiro Suo