Patents by Inventor Toshiya Ohsawa

Toshiya Ohsawa 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: 20080106142
    Abstract: In a brake control device using a plurality of low-noise and low-vibration pumps, if one pump fails, when the other pump compensates the function of the failed pump to reduce the influence of the failure, there is fear that a driver is not aware of the failure in the brake control device or neglects and leaves the failure unrepaired even if the driver becomes aware of the failure. The invention effectively causes the driver to be aware of the occurrence of a failure in the brake device while continuously ensuring brake force. If a failure is detected, hydraulic pressure actuators are controlled so that the pulse of hydraulic pressure in wheel cylinders becomes larger than that before the failure is detected. Alternatively, two pumps different in pulse characteristic of discharge hydraulic pressure from each other are connected in parallel to the wheel cylinders.
    Type: Application
    Filed: October 25, 2007
    Publication date: May 8, 2008
    Applicant: Hitachi, Ltd.
    Inventors: Kimio Nishino, Toshiyuki Innami, Toshiya Ohsawa, Hitoshi Kobayashi, Katsuya Iwasaki