Patents by Inventor Yoshiyuki Nagatsu

Yoshiyuki Nagatsu 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).

  • Exhaust timing controller for two-stroke engine
    Patent number: 6895908
    Abstract: A method and apparatus that permits engine system control such as exhaust valve timing without the use of separate load sensors from the output of a single engine timing sensor.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: May 24, 2005
    Assignee: Kabushiki Kaisha Moric
    Inventors: Naoya Isoda, Yoshiyuki Nagatsu
  • Ignition controller
    Patent number: 6892702
    Abstract: A number of embodiments of improved engine system control method and apparatus based on operator demand and rate of change in demand that reduce not only the number of components but also decrease the complexity of the electronic system without requiring a throttle position sensor.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: May 17, 2005
    Assignee: Kabushiki Kaisha Moric
    Inventors: Naoya Isoda, Yoshiyuki Nagatsu
  • Anti-knocking device an method
    Patent number: 6832598
    Abstract: A method and apparatus that permit anti-knock control without the use of separate knock detectors as well as controlling the basic ignition timing from the output of a single engine speed sensor.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: December 21, 2004
    Assignee: Kabushiki Kaisha Moric
    Inventors: Naoya Isoda, Yoshiyuki Nagatsu
  • Engine control method and apparatus
    Patent number: 6742502
    Abstract: An improved method and system for the control of an engine system such as the spark timing. The control senses the speed variations either during a portion of a complete cycle and a complete cycle and/or from cycle to cycle in order to determine the load on the engine from preprogrammed maps based upon the engine characteristics. From this load and the speed reading, it is possible to obtain the desired engine control. In addition the timing is set in this method only under certain specified conditions and only in response to certain specific parameters. This not only reduces the costs of the system by reducing the number of sensors, but also permits adjustments to be made more rapidly.
    Type: Grant
    Filed: April 2, 2003
    Date of Patent: June 1, 2004
    Assignee: Kabushiki Kaisha Moric
    Inventors: Yoshiyuki Nagatsu, Naoya Isoda
  • Engine control method and apparatus
    Patent number: 6626145
    Abstract: An improved method and system for the control of an engine system such as the spark timing. The control senses the speed variations either during a portion of a complete cycle and a complete cycle and/or from cycle to cycle in order to determine the load on the engine from preprogrammed maps based upon the engine characteristics. From this load and the speed reading, it is possible to obtain the desired engine control. This not only reduces the costs of the system by reducing the number of sensors, but also permits adjustments to be made more rapidly.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: September 30, 2003
    Assignee: Kabushiki Kaisha MORIC
    Inventors: Masahiko Enoyoshi, Naoya Isoda, Yoshiyuki Nagatsu
  • EXHAUST TIMING CONTROLLER FOR TWO-STROKE ENGINE
    Publication number: 20030168027
    Abstract: A method and apparatus that permits engine system control such as exhaust valve timing without the use of separate load sensors from the output of a single engine timing sensor.
    Type: Application
    Filed: May 23, 2003
    Publication date: September 11, 2003
    Applicant: KABUSHIKI KASHIA MORIC
    Inventors: Naoya Isoda, Yoshiyuki Nagatsu
  • IGNITION CONTROLLER
    Publication number: 20030168047
    Abstract: A number of embodiments of improved engine system control method and apparatus based on operator demand and rate of change in demand that reduce not only the number of components but also decrease the complexity of the electronic system without requiring a throttle position sensor.
    Type: Application
    Filed: May 23, 2003
    Publication date: September 11, 2003
    Applicant: KABUSHIKI KAISHA MORIC
    Inventors: Naoya Isoda, Yoshiyuki Nagatsu
  • OIL CONTROL DEVICE FOR TWO-STROKE ENGINE
    Publication number: 20030168028
    Abstract: A method and apparatus that permits engine system control such as exhaust valve timing without the use of separate load sensors from the output of a single engine timing sensor.
    Type: Application
    Filed: May 23, 2003
    Publication date: September 11, 2003
    Applicant: KAIBUSHIKI KAISHA MORIC
    Inventors: Naoya Isoda, Yoshiyuki Nagatsu
  • ANTI-KNOCKING DEVICE AND METHOD
    Publication number: 20030168046
    Abstract: A method and apparatus that permit anti-knock control without the use of separate knock detectors as well as controlling the basic ignition timing from the output of a single engine speed sensor.
    Type: Application
    Filed: May 23, 2003
    Publication date: September 11, 2003
    Applicant: KABUSHIKI KAISHA MORIC
    Inventors: Naoya Isoda, Yoshiyuki Nagatsu
  • ENGINE CONTROL METHOD AND APPARATUS
    Publication number: 20030136379
    Abstract: An improved method and system for the control of an engine system such as the spark timing. The control senses the speed variations either during a portion of a complete cycle and a complete cycle and/or from cycle to cycle in order to determine the load on the engine from preprogrammed maps based upon the engine characteristics. From this load and the speed reading, it is possible to obtain the desired engine control. In addition the timing is set in this method only under certain specified conditions and only in response to certain specific parameters. This not only reduces the costs of the system by reducing the number of sensors, but also permits adjustments to be made more rapidly.
    Type: Application
    Filed: April 2, 2003
    Publication date: July 24, 2003
    Inventors: Yoshiyuki Nagatsu , Naoya Isoda
  • Engine control method and apparatus
    Publication number: 20020043245
    Abstract: An improved method and system for the control of an engine system such as the spark timing. The control senses the speed variations either during a portion of a complete cycle and a complete cycle and/or from cycle to cycle in order to determine the load on the engine from preprogrammed maps based upon the engine characteristics. From this load and the speed reading, it is possible to obtain the desired engine control. This not only reduces the costs of the system by reducing the number of sensors, but also permits adjustments to be made more rapidly.
    Type: Application
    Filed: September 5, 2001
    Publication date: April 18, 2002
    Inventors: Masahiko Enoyoshi, Naoya Isoda, Yoshiyuki Nagatsu