Patents by Inventor Jinpei Fukazawa

Jinpei Fukazawa 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).

  • Apparatus for sensing Schnarren phenomenon in fuel injection line
    Patent number: 4231251
    Abstract: A sensor (16) produces an electrical signal corresponding to the pulsating pressure in a high pressure fuel line (13) leading to a fuel injection valve (14), the pulsations being produced by opening and closing of the valve (14). The electrical signal and a reference signal are fed to a cathode ray tube display unit (18) to produce a Lissajous figure. The shape of the Lissajous figure indicates whether the Schnarren phenomenon is present and, if so, to what extent. The frequencies or amplitudes of the electrical signal and reference signal are compared to produce a signal indicating the difference therebetween which is fed to a digital display unit (22).
    Type: Grant
    Filed: April 17, 1979
    Date of Patent: November 4, 1980
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Hatsuno, Jinpei Fukazawa, Mitsuo Fukushima, Shinji Ogawa