Patents by Inventor Naoya Takahagi

Naoya Takahagi 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).

  • Automatic transmission control unit
    Patent number: 6371879
    Abstract: Torque phase detecting means 110 detects the starting point of a torque phase in an automatic transmission. Racing detecting means 120 detects a racing. Control means 140 shifts disconnecting or connecting hydraulic pressure or timing in the next automatic transmission according to whether the racing means 120 occurred before or after the starting point of a torque phase detected by said torque phase detecting means 110. An automatic transmission control unit which suppresses racing without giving any shock to the driver can be obtained.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: April 16, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Naoya Takahagi, Hiroshi Kuroiwa