Patents by Inventor Tokuji Yoshikawa

Tokuji Yoshikawa 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).

  • Publication number: 20010017077
    Abstract: A controller of a vacuum brake power booster which amplifies an input force of a brake pedal and outputs the amplified force to a brake device, is characterized by comprising a control signal generating means generating a plurality of kinds of signals for controlling the vacuum brake power booster, and a means for switching or selecting the plurality of signals on the basis of an input different from one of the brake pedal.
    Type: Application
    Filed: February 23, 2001
    Publication date: August 30, 2001
    Applicant: HITACHI, LTD.
    Inventors: Satoru Kuragaki, Tokuji Yoshikawa
  • Publication number: 20010014845
    Abstract: An apparatus and a method for controlling an automotive vehicle are disclosed, in which a control amount for securing safety of the vehicle and the control amount for achieving a state intended for by the driver of the vehicle are switched in such a manner as to reduce the shock due to the change in the torque generated from the power train, thereby accomplishing both safety and maneuverability at the same time. A first target value is set for controlling at least selected one of the driving torque, the driving force and the acceleration/deceleration rate. A second target value is calculated in accordance with the drive mode intended for by the driver or the driving environment ahead of the vehicle. In the case where a deviation exceeding a predetermined value develops between the first target value and the second target value, the fluctuations of at least one of the driving torque, the driving force and the acceleration/deceleration rate are suppressed.
    Type: Application
    Filed: March 30, 2001
    Publication date: August 16, 2001
    Applicant: Hitachi, Ltd.
    Inventors: Toshimichi Minowa, Tatsuya Ochi, Satoru Kuragaki, Mitsuo Kayano, Tokuji Yoshikawa
  • Patent number: 6191704
    Abstract: Described herein is a run environment recognizing apparatus. The run environment recognizing apparatus comprises an imaging device for sensing the direction of traveling of a host vehicle as imaging vision, a radar for detecting the direction of traveling of the host vehicle as a detection range, an image processing device for recognizing traveling lanes, leading vehicles and stationary objects located ahead of the host vehicle, based on the image information sensed by the imaging device and the result of detection by the radar, and a display for displaying the results of recognition by the image processing device. The image processing device includes means for setting vehicle regions indicative of the leading vehicles within the image information, based on the result of detection by the radar. Thus, the influence of the leading vehicles in the process for recognizing the traveling lanes within the image information is eliminated by the vehicle regions.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: February 20, 2001
    Assignee: Hitachi, Ltd,
    Inventors: Hiroshi Takenaga, Hiroshi Kuroda, Satoru Kuragaki, Mitsuo Kayano, Tokuji Yoshikawa, Hiroto Morizane, Kazuaki Takano