Patents by Inventor Masafumi Nishiyama

Masafumi Nishiyama 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).

  • Crank angle detecting system for engines
    Patent number: 4747389
    Abstract: A crank angle detecting system for a multicylinder engine includes a disc formed with a large number of slits to detect one-degree crank angular positions and a small number of slits to detect a predetermined piston stroke for each cylinder. Since the widths of a small number of slits are different from each other, it is possible to separately discriminate each cylinder in crank angular position on the basis of the crank angle signals obtained by a large number of slits. In the case where the detecting system is incorporated with a group-ignition system, it is possible to detect a predetermined piston stroke for each cylinder immediately after the engine is started, thus preventing the engine from erroneous ignition.
    Type: Grant
    Filed: January 2, 1987
    Date of Patent: May 31, 1988
    Assignee: Nissan Motor Company, Limited
    Inventors: Haruo Yuzawa, Masafumi Nishiyama, Katsuyuki Nakamura, Kazuhiro Ishigami
  • Crank angle detecting system for engines
    Patent number: 4656993
    Abstract: A crank angle detecting system for a multicylinder engine includes a disc formed with a large number of slits to detect one-degree crank angular positions and a small number of slits to detect a predetermined piston stroke for each cylinder. Since the widths of a small number of slits are different from each other, it is possible to separately discriminate each cylinder in crank angular position on the basis of the crank angle signals obtained by a large number of slits. In the case where the detecting system is incorporated with a group-ignition system, it is possible to detect a predetermined piston stroke for each cylinder immediately after the engine is started, thus preventing the engine from erroneous ignition.
    Type: Grant
    Filed: March 8, 1985
    Date of Patent: April 14, 1987
    Assignee: Nissan Motor Company, Limited
    Inventors: Haruo Yuzawa, Masafumi Nishiyama, Katsuyuki Nakamura, Kazuhiro Ishigami
  • Crank angle detecting system for engines
    Patent number: RE34257
    Abstract: A crank angle detecting system for a multicylinder engine includes a disc formed with a large number of slits to detect one-degree crank angular positions and a small number of slits to detect a predetermined piston stroke for each cylinder. Since the widths of a small number of slits are different from each other, it is possible to separately discriminate each cylinder in crank angular position on the basis of the crank angle signals obtained by a large number of slits. In the case where the detecting system is incorporated with a group-ignition system, it is possible to detect a predetermined piston stroke for each cylinder immediately after the engine is started, thus preventing the engine from erroneous ignition.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: May 18, 1993
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Haruo Yuzawa, Masafumi Nishiyama, Katsuyuki Nakamura, Kazuhiro Ishigami