Patents by Inventor Yukifumi OTSUKA

Yukifumi OTSUKA 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).

  • Hybrid vehicle control device with transmission control for a level difference of a road surface
    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
  • Hybrid vehicle control device
    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
  • HYBRID VEHICLE CONTROL DEVICE
    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
  • HYBRID VEHICLE CONTROL DEVICE
    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