Patents by Inventor Ken Iwatsuki

Ken Iwatsuki 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).

  • Publication number: 20050188939
    Abstract: Large vibrations can be prevented from being generated during engine rotation. A control apparatus for driving a vehicle has an engine stop permission output control processing module which: reads engine rotational speed; determines whether the engine rotational speed takes a value within a predetermined stop disable range; does not output an engine stop permission when the engine rotational speed takes a value within the stop disable range; and outputs an engine stop permission when the engine rotational speed takes a value except the value within the stop disable range, and an engine stop control processing module which stops an engine when the engine stop permission is outputted. In this case, when the engine rotational speed takes the value except the value within the stop disable range, the engine stop permission is outputted to stop the engine.
    Type: Application
    Filed: February 28, 2005
    Publication date: September 1, 2005
    Inventors: Ken Iwatsuki, Takeshi Hara, Kazuma Hasegawa
  • Publication number: 20050159861
    Abstract: A drive control system for an electric vehicle and a method of drive control of the electric vehicle. The drive control system for the electric vehicle includes a drive motor target torque calculation processing device for calculating a drive motor target torque representing a target torque of a drive motor; and a drive motor target torque restriction processing device that judges whether or not a parking mechanism is in operation and, if the parking mechanism is in operation, restricts variations in the drive motor target torque.
    Type: Application
    Filed: December 3, 2004
    Publication date: July 21, 2005
    Inventors: Ken Iwatsuki, Masaki Nomura
  • Publication number: 20050078431
    Abstract: The electric charge of a capacitor can be reliably discharged. Therefore, an electric discharge controller has an electrically operated machine, an inverter, a capacitor, a voltage command value generating processor for generating a voltage command value for driving, an electric discharge control processor for generating a voltage command value for electric discharge, and a driving signal generating processor. When an electric current is supplied from a direct electric current source to the inverter, the driving signal generating processor generates a driving signal on the basis of the voltage command value for driving. When the supply of the electric current from the direct electric current source to the inverter is interrupted, the driving signal generating processor generates the driving signal on the basis of the voltage command value for electric discharge, and supplies the driving signal to the inverter.
    Type: Application
    Filed: October 7, 2004
    Publication date: April 14, 2005
    Applicants: AISIN AW CO., LTD., KABUSHIKI KAISHA TOSHIBA
    Inventors: Ken Iwatsuki, Takeshi Kitahata
  • Publication number: 20040249518
    Abstract: An electrically operated vehicle driving controller has an electrically operated machine driving section for operating an electrically operated machine; a driving section temperature detecting section for detecting the driving section temperature of the electrically operated machine driving section; a limit ratio calculating processor for calculating a limit ratio for limiting the torque of the electrically operated machine on the basis of the driving section temperature; a rotating speed calculating processor for calculating the rotating speed of the electrically operated machine; and a limit torque calculating processor for calculating an electrically operated machine limit torque corresponding to an electrically operated machine maximum torque set corresponding to the rotating speed on the basis of the limit ratio.
    Type: Application
    Filed: May 24, 2004
    Publication date: December 9, 2004
    Applicant: AISIN AW CO., LTD.
    Inventors: Toshio Okoshi, Ken Iwatsuki, Taketo Takeuchi
  • Publication number: 20040148070
    Abstract: An electric drive control apparatus including an electrically operated machine, a detector for detecting a current supplied to the electrically operated machine, and a controller that estimates a subsequent current based on a detected current, effects proportional operation processing based on an estimated current, effects integration operation processing based on the detected current, generates output signals based on a first value of the proportional operation processing and a second value of the integration operation processing, and generates an electric current to be fed to the electrically operated machine based on the output signals.
    Type: Application
    Filed: December 23, 2003
    Publication date: July 29, 2004
    Applicant: AISIN AW CO., LTD.
    Inventors: Masami Ishikawa, Ken Iwatsuki
  • Publication number: 20040045751
    Abstract: An object of the invention is to provide a hybrid vehicle drive apparatus, a control method of a hybrid vehicle drive apparatus, and a program thereof which are capable of preventing an engine (11) from racing at the time of sharp acceleration of the vehicle and therefore preventing a degraded state of exhaust gas, and therefore increasing the overall output. The invention includes: an electric power generator (16) mechanically connected to the engine (11); a drive motor (25) driven by at least one of an electric current generated by the electric power generator (16) and an electric current supplied from a battery (43); battery state detecting means for detecting a battery state of the battery (43); target drive motor torque setting means (90) for setting a target torque of the drive motor based on the battery state. In this case, the target drive motor torque is set based on the battery state.
    Type: Application
    Filed: August 26, 2003
    Publication date: March 11, 2004
    Inventors: Kazuo Aoki, Toshio Okoshi, Hiroyuki Kojima, Kozo Yamaguchi, Ken Iwatsuki
  • Patent number: 5969500
    Abstract: In a motor control system and method controlled by a d-axis current command value i.sub.ds and a q-axis current command value i.sub.qs, a d-axis voltage command value V.sub.d * and a q-axis voltage command value v.sub.q * are computed on the basis of d-axis current deviation .DELTA.i.sub.d of d-axis current value i.sub.d from the d-axis current command value i.sub.ds and q-axis current deviation .DELTA.i.sub.q of q-axis current value i.sub.q from the q-axis current command value i.sub.qs and on the basis of q-axis inductance value L.sub.q and d-axis inductance value L.sub.d wherein the inductance values L.sub.q and L.sub.d are tuned or adjusted so that the d-axis current deviation .DELTA.i.sub.d and q-axis current deviation .DELTA.i.sub.q approach zero.
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: October 19, 1999
    Assignee: Aisin Aw Co., Ltd.
    Inventors: Masami Ishikawa, Shinichi Otake, Ken Iwatsuki