Patents by Inventor Takeshi Etoh

Takeshi Etoh 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).

  • Variable valve operating system of engine enabling variation of working angle and phase
    Patent number: 6820579
    Abstract: In a variable intake-valve operating system for an engine enabling a working angle of an intake valve and a phase at a maximum lift point of the intake valve to be varied, a variable working-angle control mechanism is provided to continuously change the working angle of the intake valve and a variable phase control mechanism is provided to continuously change the phase of the intake valve. A control unit is configured to be electronically connected to both the two variable control mechanisms, to simultaneously control these control mechanisms responsively to a desired working angle and a desired phase both based on an engine operating condition. The control unit executes a synchronous control that a time rate of change of the working angle and a time rate of change of the phase are synchronized with each other in a transient state that the engine operating condition changes.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: November 23, 2004
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Katsuhiko Kawamura, Takeshi Etoh
  • Variable valve operating system of engine enabling variation of working angle and phase
    Publication number: 20040011313
    Abstract: In a variable intake-valve operating system for an engine enabling a working angle of an intake valve and a phase at a maximum lift point of the intake valve to be varied, a variable working-angle control mechanism is provided to continuously change the working angle of the intake valve and a variable phase control mechanism is provided to continuously change the phase of the intake valve. A control unit is configured to be electronically connected to both the two variable control mechanisms, to simultaneously control these control mechanisms responsively to a desired working angle and a desired phase both based on an engine operating condition. The control unit executes a synchronous control that a time rate of change of the working angle and a time rate of change of the phase are synchronized with each other in a transient state that the engine operating condition changes.
    Type: Application
    Filed: June 3, 2003
    Publication date: January 22, 2004
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Katsuhiko Kawamura, Takeshi Etoh