Patents by Inventor Masumi Wada

Masumi Wada 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: 7194348
    Abstract: A high acceleration time shift control apparatus and method for a vehicle is provided. The high acceleration time shift control apparatus includes a transmission which achieves plural shift speeds whose gear ratios are different from each other; and a high acceleration time upshifting control device which changes a shift speed of the transmission to a higher speed based on a predetermined determination rotational speed such that an input rotational speed of the transmission substantially reaches a target maximum rotational speed when a request for high acceleration is made by a driver.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: March 20, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masumi Wada, Yoshiharu Harada, Masayasu Mizobuchi, Naoyuki Sakamoto
  • Patent number: 6893379
    Abstract: When it has been determined that control for a predetermined upshift has been started while an accelerator pedal was not being depressed, and that a factor that changes an input torque of an automatic transmission has been generated, an engaging pressure of a predetermined hydraulic frictional engagement device is corrected by a correction amount in accordance with the factor that changes the input torque. As a result, undershooting of an engine speed, as well as shift shock which results from that undershooting, is able to be preferably suppressed.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: May 17, 2005
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Naoyuki Sakamoto, Toshimitsu Sato, Hisanori Nomoto, Hiromichi Kimura, Toshio Sugimura, Masumi Wada
  • Publication number: 20040153232
    Abstract: A high acceleration time shift control apparatus and method for a vehicle is provided. The high acceleration time shift control apparatus includes a transmission which achieves plural shift speeds whose gear ratios are different from each other; and a high acceleration time upshifting control device which changes a shift speed of the transmission to a higher speed based on a predetermined determination rotational speed such that an input rotational speed of the transmission substantially reaches a target maximum rotational speed when a request for high acceleration is made by a driver.
    Type: Application
    Filed: December 31, 2003
    Publication date: August 5, 2004
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masumi Wada, Yoshiharu Harada, Masayasu Mizobuchi, Naoyuki Sakamoto
  • Publication number: 20040053745
    Abstract: When it has been determined by first determining means that control for a predetermined upshift has been started while an accelerator pedal was not being depressed, and it has been determined by second determining means that a factor that changes an input torque of an automatic transmission has been generated, correction controlling means corrects an engaging pressure of a predetermined hydraulic frictional engagement device by a correction amount in accordance with the factor that changes the input torque. As a result, undershooting of an engine speed, as well as shift shock which results from that undershooting, is able to be preferably suppressed even when a factor that changes the output torque of an engine is generated.
    Type: Application
    Filed: August 13, 2003
    Publication date: March 18, 2004
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoyuki Sakamoto, Toshimitsu Sato, Hisanori Nomoto, Hiromichi Kimura, Toshio Sugimura, Masumi Wada