Patents by Inventor Takashi NOBUKAWA

Takashi NOBUKAWA 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).

  • Apparatus and method for controlling continuously variable transmission
    Patent number: 11015704
    Abstract: A vehicle has an engine (1) as a driving source. Output rotation of the engine (1) is transmitted to driving wheels (7) through a torque converter (2) equipped with a lock-up clutch, a first gear train (3), a transmission (4) formed by combination of a variator (20) and an auxiliary transmission (30), a second gear train (5) and a final speed reduction device (6). The second gear train (5) is provided with a parking mechanism (8) that mechanically locks an output shaft of the transmission (4) so that the output shaft of the transmission (4) cannot rotate during parking of the vehicle. A shift speed when down-shift is performed by the variator (20) during a torque-down request to the engine (1) is set to be slower than a shift speed when down-shift is performed by the variator (20) during a non-torque-down request.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: May 25, 2021
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Sho Okutani, Takashi Koguchi, Makoto Komatsu, Takashi Nobukawa
  • APPARATUS AND METHOD FOR CONTROLLING CONTINUOUSLY VARIABLE TRANSMISSION
    Publication number: 20210071755
    Abstract: A vehicle has an engine (1) as a driving source. Output rotation of the engine (1) is transmitted to driving wheels (7) through a torque converter (2) equipped with a lock-up clutch, a first gear train (3), a transmission (4) formed by combination of a variator (20) and an auxiliary transmission (30), a second gear train (5) and a final speed reduction device (6). The second gear train (5) is provided with a parking mechanism (8) that mechanically locks an output shaft of the transmission (4) so that the output shaft of the transmission (4) cannot rotate during parking of the vehicle. A shift speed when down-shift is performed by the variator (20) during a torque-down request to the engine (1) is set to be slower than a shift speed when down-shift is performed by the variator (20) during a non-torque-down request.
    Type: Application
    Filed: August 7, 2018
    Publication date: March 11, 2021
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Sho OKUTANI, Takashi KOGUCHI, Makoto KOMATSU, Takashi NOBUKAWA
  • Control device for continuously variable transmission
    Patent number: 10385968
    Abstract: Disclosed is a control device for a continuously variable transmission (4) that has, as forward speed change stages, a first speed change stage (32) and a second speed change stage (33).
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: August 20, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Seiichiro Takahashi, Takuichiro Inoue, Koutarou Tagami, Fumito Shinohara, Hiroyuki Suzuki, Yuji Okamoto, Takashi Nobukawa
  • CONTROL DEVICE FOR CONTINUOUSLY VARIABLE TRANSMISSION
    Publication number: 20160223079
    Abstract: Disclosed is a control device for a continuously variable transmission (4) that has, as forward speed change stages, a first speed change stage (32) and a second speed change stage (33).
    Type: Application
    Filed: September 24, 2014
    Publication date: August 4, 2016
    Applicants: JATCO LTD, NISSAN MOTOR CO., LTD
    Inventors: Seiichiro TAKAHASHI, Takuichiro INOUE, Koutarou TAGAMI, Fumito SHINOHARA, Hiroyuki SUZUKI, Yuji OKAMOTO, Takashi NOBUKAWA