Patents by Inventor Yutaka Sueda

Yutaka Sueda 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).

  • Steplessly variable transmission control for automotive vehicle
    Patent number: 4875892
    Abstract: An apparatus for controlling the speed ratio of a steplessly variable transmission of an automotive vehicle comprises a belt-pulley type of steplessly variable transmission mechanism, a speed ratio control device for steplessly varying the speed ratio of the belt-pulley transmission mechanism according to speed ratio change schedules of a target engine speed relative to a vehicle speed depending upon engine load conditions, and a drive mode change device for changing the steplessly variable transmission in operation between a power drive priority mode and a fuel economy drive priority mode and changing the speed ratio change schedules to two different patterns, one suitable for the power drive priority mode and the other suitable for the economy drive mode according to the change of drive mode.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: October 24, 1989
    Assignee: Mazda Motor Corporation
    Inventor: Yutaka Sueda