Patents by Inventor Haruhiro Iwaki

Haruhiro Iwaki 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).

  • Constant speed running control apparatus for vehicle and method thereof
    Patent number: 7172043
    Abstract: When a constant speed running control is released during a changing operation of target vehicle speed, a target vehicle speed in just before the changing operation of target vehicle speed is set to a target vehicle speed at the time when the constant speed running control is resumed.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: February 6, 2007
    Assignee: Hitachi, Ltd.
    Inventor: Haruhiro Iwaki
  • Constant speed running control apparatus for vehicle and method thereof
    Publication number: 20040134701
    Abstract: When a constant speed running control is released during a changing operation of target vehicle speed, a target vehicle speed in just before the changing operation of target vehicle speed is set to a target vehicle speed at the time when the constant speed running control is resumed.
    Type: Application
    Filed: December 23, 2003
    Publication date: July 15, 2004
    Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.
    Inventor: Haruhiro Iwaki
  • Apparatus and method for controlling variable valve timing mechanism
    Patent number: 6708657
    Abstract: In an apparatus for, controlling a variable valve timing mechanism that variably controls valve timing of an engine by changing a rotation phase of a camshaft relative to a crankshaft due to friction braking of an electromagnetic brake, the rotation phase is controlled while limiting a change rate of the rotation phase.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: March 23, 2004
    Assignee: Unisia Jecs Corporation
    Inventors: Haruhiro Iwaki, Satoru Watanabe
  • Apparatus and method for diagnosing variable valve timing apparatus
    Patent number: 6615778
    Abstract: In a variable valve timing apparatus for variably controlling the valve timing by changing a rotation phase of a camshaft with respect to a crankshaft, an abnormality diagnosis of the apparatus is performed on a condition that a change amount per unit time in a control target value of the rotation phase has been kept equal to or less than a predetermined limit value for a predetermined period or more.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: September 9, 2003
    Assignee: Unisia Jecs Corporation
    Inventors: Haruhiro Iwaki, Hajime Hosoya
  • Apparatus and method for controlling variable valve timing mechanism
    Publication number: 20020174843
    Abstract: In an apparatus for, controlling a variable valve timing mechanism that variably controls valve timing of an engine by changing a rotation phase of a camshaft relative to a crankshaft due to friction braking of an electromagnetic brake, the rotation phase is controlled while limiting a change rate of the rotation phase.
    Type: Application
    Filed: May 23, 2002
    Publication date: November 28, 2002
    Applicant: UNISIA JECS CORPORATION
    Inventors: Haruhiro Iwaki, Satoru Watanabe
  • Air-fuel ratio control device for internal combustion engine and method thereof
    Patent number: 6453229
    Abstract: In an air-fuel ratio feedback control of an internal combustion engine aimed to approximate an air-fuel ratio to a target air-fuel ratio set according to operating conditions of the engine, the feedback control is carried out using the feedback control amount which is computed according to a sliding mode control, having a deviation between the target air-fuel ratio and the detected air-fuel ratio detected by the air-fuel ratio sensor set as a switching function. According to the present invention, a simple air-fuel ratio feedback control is carried out according to an accurate sliding mode control with no dispersion for each engine, that is easy to design, and that can be applied generally to any kind of vehicle or engine.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: September 17, 2002
    Assignee: Unisia Jecs Corporation
    Inventors: Shigeo Ohkuma, Koji Takahashi, Satoru Watanabe, Hajime Hosoya, Hidekazu Yoshizawa, Haruhiro Iwaki
  • Apparatus and method for diagnosing variable valve timing apparatus
    Publication number: 20020062798
    Abstract: In a variable valve timing apparatus for variably controlling the valve timing by changing a rotation phase of a camshaft with respect to a crankshaft, an abnormality diagnosis of the apparatus is performed on a condition that a change amount per unit time in a control target value of the rotation phase has been kept equal to or less than a predetermined limit value for a predetermined period or more.
    Type: Application
    Filed: November 21, 2001
    Publication date: May 30, 2002
    Applicant: UNISIA JECS CORPORATION
    Inventors: Haruhiro Iwaki, Hajime Hosoya