Patents by Inventor Yoshitatsu Nakamura

Yoshitatsu Nakamura 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).

  • Piston for an internal combustion engine
    Patent number: 6845741
    Abstract: A piston for an internal combustion engine is provided. The engine has an intake port through which an intake air is introduced into the cylinder in a way as to produce a swirl that travels along while whirling about an axis transversal to an axis of the cylinder. The piston has at a crown face thereof a cavity that has a part-cylindrical bottom. The cavity has a longitudinal center axis extending obliquely to a crank axis so that the longitudinal center axis of the cavity nearly coincides with an axis along which the swirl travels within the cylinder.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: January 25, 2005
    Assignee: Hitachi Unisia Automotive, Ltd.
    Inventors: Masayuki Saruwatari, Yoshitatsu Nakamura
  • Piston for an internal combustion engine
    Publication number: 20040003793
    Abstract: A piston for an internal combustion engine is provided. The engine has an intake port through which an intake air is introduced into the cylinder in a way as to produce a swirl that travels along while whirling about an axis transversal to an axis of the cylinder. The piston has at a crown face thereof a cavity that has a part-cylindrical bottom. The cavity has a longitudinal center axis extending obliquely to a crank axis so that the longitudinal center axis of the cavity nearly coincides with an axis along which the swirl travels within the cylinder.
    Type: Application
    Filed: May 22, 2003
    Publication date: January 8, 2004
    Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.
    Inventors: Masayuki Saruwatari, Yoshitatsu Nakamura
  • Fuel pressure control device of engine
    Patent number: 6450148
    Abstract: In a device for controlling the pressure of fuel supplied from a fuel pump to a fuel injection valve, a target fuel pressure corresponding to the engine operation condition is controlled to a lower limit value set based on an engine environmental temperature.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: September 17, 2002
    Assignee: Unisia Jecs Corporation
    Inventors: Yoshitatsu Nakamura, Masaki Nakamura, Toru Kitayama
  • Device for controlling fuel pressure of engine and method thereof
    Patent number: 6382184
    Abstract: In a fuel pressure control system of a non-return system which feedback controls the fuel pressure supplied to a fuel injection valve to meet the fuel supply amount, a fuel pressure in a fuel supply passage is feedback controlled to become a pressure corresponding to the engine environmental temperature condition of during the engine operation stop.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: May 7, 2002
    Assignee: Unisia Jecs Corporation
    Inventors: Yoshitatsu Nakamura, Masaki Nakamura, Toru Kitayama
  • Device for controlling fuel pressure of engine and method thereof
    Publication number: 20010023683
    Abstract: In a fuel pressure control system of a non-return system which feedback controls the fuel pressure supplied to a fuel injection valve to meet the fuel supply amount, a fuel pressure in a fuel supply passage is feedback controlled t become a pressure corresponding to the engine environmental temperature condition of during the engine operation stop.
    Type: Application
    Filed: November 30, 2000
    Publication date: September 27, 2001
    Inventors: Yoshitatsu Nakamura, Masaki Nakamura, Toru Kitayama
  • Fuel pressure control device of engine
    Publication number: 20010003975
    Abstract: In a device for controlling the pressure of fuel supplied from a fuel pump to a fuel injection valve, a target fuel pressure corresponding to the engine operation condition is controlled to a lower limit value set based on an engine environmental temperature.
    Type: Application
    Filed: November 30, 2000
    Publication date: June 21, 2001
    Inventors: Yoshitatsu Nakamura, Masaki Nakamura, Toru Kitayama