Patents by Inventor Takehiko Fushimi

Takehiko Fushimi 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).

  • Patent number: 8047512
    Abstract: A vibration damping apparatus actively damping vibration of a vibration source by adding vibration to the vibration source includes a vibrational state detecting means and a vibrator including a magnetic pole, a coil, and a controlling means, and the vibrator adds vibration to the vibration source by controlling a current-supplied state of the coil to vibrate the coil and the magnetic pole relatively, wherein the controlling means selectively switches a vibration generating mode and a regenerative mode based on the vibrational state of the vibration source, the vibration is added to the vibration source to damp the vibration of the vibration source in the vibration generating mode, and regenerative current is caused by an electro motive force generated at the coil by the vibration of the vibration source to flow into a regenerative resistor in the regenerative mode.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: November 1, 2011
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Daichi Mizushima, Takehiko Fushimi
  • Patent number: 7756619
    Abstract: An active vibration insulator includes an electromagnetic actuator, a controller, and a bad-roads processor. The electromagnetic actuator generates vibrating forces depending on electric-current supplies. The controller carries out vibrating-forces generation control. In the vibrating-forces generation control, the electric-current supplies are made variable so as to actively inhibit vibrations generated by an on-vehicle vibration generating source of a vehicle from transmitting to a specific part of the vehicle based on cyclic pulsating signals output from the on-vehicle vibration generating source. Thus, the controller lets the electromagnetic actuator generate the vibrating forces. The bad-roads processor stops the vibrating-forces generation control effected by the controller when the vehicle travels on bad roads.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: July 13, 2010
    Assignee: Tokai Rubber Industries, Ltd.
    Inventors: Hiroyuki Ichikawa, Takayoshi Yasuda, Hideki Oshima, Takehiko Fushimi, Daichi Mizushima, Kenichi Sato
  • Patent number: 7747353
    Abstract: A method of setting control data by an active vibration isolation control system includes the steps of selecting, when a frequency of a pulse signal actually detected is superior to a predetermined frequency, appropriate control data selected from among predetermined data maps incorporating control data capable of securing, in accordance with various vehicle driving conditions respectively, a control condition in which operation of the vibrator is preferably controlled, calculating a deviation between the appropriate control data commensurate with the actual vehicle driving condition at the time of controlling and actually detected data representing vibration subjected to a vehicle specific position, the actually detected data obtained in terms of a same physics amount as a physics amount of the control data, and modifying the appropriate control data on the basis of the calculated deviation.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: June 29, 2010
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Daichi Mizushima, Takehiko Fushimi, Hiroyuki Ichikawa, Atsushi Muramatsu
  • Patent number: 7403367
    Abstract: An active vibration insulator includes an electromagnetic actuator, a control-signals generating device, a driver, a calculator, and a judging device. The electromagnetic actuator generates vibrating forces depending on electric-current supplies. The control-signals generating device generates cyclic control signals based on cyclic pulsating signals output from a vibration generating source of a vehicle. The cyclic control signals actively inhibit vibrations generated by the vibration generating source from transmitting to a specific part of the vehicle. The driver drives the electromagnetic actuator by making the electric-current supplies variable based on the cyclic control signals. The calculator calculates an estimated transfer function composed of estimated values of a transfer function for a transfer system including the electromagnetic actuator and the driver. The judging device judges an inoperative malfunction of the electromagnetic actuator based the estimated transfer function.
    Type: Grant
    Filed: December 27, 2005
    Date of Patent: July 22, 2008
    Assignees: Tokai Rubber Industries, Ltd, Aisin Seiki Kabushiki Kaisha
    Inventors: Takayoshi Yasuda, Hideki Oshima, Hiroyuki Ichikawa, Daichi Mizushima, Takehiko Fushimi, Kenichi Sato
  • Publication number: 20080106015
    Abstract: An active vibration reduction system for a vehicle for suppressing a vibration from a vibration source includes a vibration suppression signal generating unit for generating a vibration suppression signal having a frequency being synchronous with the vibration from the vibration source, a sensible signal generating unit for generating a sensible signal having a frequency being asynchronous with the vibration from the vibration source, a magnetic pole forming magnetic flux, a coil provided in a manner that intersects the magnetic flux, and a coil driving circuit relatively vibrating the magnetic pole and the coil by controlling an energized state of the coil based on the vibration suppression signal and the sensible signal.
    Type: Application
    Filed: November 5, 2007
    Publication date: May 8, 2008
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takehiko FUSHIMI, Daichi MIZUSHIMA
  • Publication number: 20070241489
    Abstract: A vibration damping apparatus actively damping vibration of a vibration source by adding vibration to the vibration source includes a vibrational state detecting means and a vibrator including a magnetic pole, a coil, and a controlling means, and the vibrator adds vibration to the vibration source by controlling a current-supplied state of the coil to vibrate the coil and the magnetic pole relatively, wherein the controlling means selectively switches a vibration generating mode and a regenerative mode based on the vibrational state of the vibration source, the vibration is added to the vibration source to damp the vibration of the vibration source in the vibration generating mode, and regenerative current is caused by an electro motive force generated at the coil by the vibration of the vibration source to flow into a regenerative resistor in the regenerative mode.
    Type: Application
    Filed: April 4, 2007
    Publication date: October 18, 2007
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Daichi Mizushima, Takehiko Fushimi
  • Patent number: 7209338
    Abstract: An active vibration insulator includes an electromagnetic actuator, a cyclic-control-signals output device, and an electromagnetic-actuator driver. The electromagnetic-actuator driver includes an asymmetric half-bridge circuit, and an actuating-signals output device. The actuating-signal output device outputs a signal for turning on one of a high-side switch and a low-side switch of the asymmetric half-bridge circuit, and outputs a pulse-width-modulated actuating signal for actuating the other one of them by means of pulse-width modulation based on the cyclic control signals, which the cyclic-control-signals output device outputs, or outputs a pulse-width-modulated actuating signal for actuating both of them by means of pulse-width modulation when the cyclic control signals are positive.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: April 24, 2007
    Assignees: Tokai Rubber Industries, Ltd, Aisin Seiki Kabushiki Kaisha
    Inventors: Hiroyuki Ichikawa, Takehiko Fushimi
  • Publication number: 20060287788
    Abstract: An active vibration insulator includes an electromagnetic actuator, a controller, and a bad-roads processor. The electromagnetic actuator generates vibrating forces depending on electric-current supplies. The controller carries out vibrating-forces generation control. In the vibrating-forces generation control, the electric-current supplies are made variable so as to actively inhibit vibrations generated by an on-vehicle vibration generating source of a vehicle from transmitting to a specific part of the vehicle based on cyclic pulsating signals output from the on-vehicle vibration generating source. Thus, the controller lets the electromagnetic actuator generate the vibrating forces. The bad-roads processor stops the vibrating-forces generation control effected by the controller when the vehicle travels on bad roads.
    Type: Application
    Filed: June 12, 2006
    Publication date: December 21, 2006
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroyuki Ichikawa, Takayoshi Yasuda, Hideki Oshima, Takehiko Fushimi, Daichi Mizushima, Kenichi Sato
  • Publication number: 20060287799
    Abstract: An active vibration insulator includes an electromagnetic actuator, a control-signals generator, a control-signals compensator, and a driver. The electromagnetic actuator generates vibrating forces depending on electric-current supplies. The control-signals generator generates control signals, which actively inhibit vibrations generated by a vibration generating source of a vehicle from transmitting to a specific part of the vehicle, based on cyclic pulsating signals output from the vibration generating source. The control-signals compensator compensates the cyclic control signals, which the control-signals generator generates, depending on output voltages of a battery. The driver is connected between the battery and the electromagnetic actuator, and makes the electric-current supplies variable based on the cyclic control signals, which the control-signals compensator has compensated, and the output voltages of the battery, thereby driving the electromagnetic actuator.
    Type: Application
    Filed: June 12, 2006
    Publication date: December 21, 2006
    Applicant: TOKAI RUBBER INDUSTRIES, LTD.
    Inventors: Hiroyuki Ichikawa, Takayoshi Yasuda, Takehiko Fushimi, Daichi Mizushima, Kenichi Sato
  • Publication number: 20060139840
    Abstract: An active vibration insulator includes an electromagnetic actuator, a control-signals generating device, a driver, a calculator, and a judging device. The electromagnetic actuator generates vibrating forces depending on electric-current supplies. The control-signals generating device generates cyclic control signals based on cyclic pulsating signals output from a vibration generating source of a vehicle. The cyclic control signals actively inhibit vibrations generated by the vibration generating source from transmitting to a specific part of the vehicle. The driver drives the electromagnetic actuator by making the electric-current supplies variable based on the cyclic control signals. The calculator calculates an estimated transfer function composed of estimated values of a transfer function for a transfer system including the electromagnetic actuator and the driver. The judging device judges an inoperative malfunction of the electromagnetic actuator based the estimated transfer function.
    Type: Application
    Filed: December 27, 2005
    Publication date: June 29, 2006
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takayoshi Yasuda, Hideki Oshima, Hiroyuki Ichikawa, Daichi Mizushima, Takehiko Fushimi, Kenichi Sato
  • Publication number: 20060023388
    Abstract: An active vibration insulator includes an electromagnetic actuator, a cyclic-control-signals output device, and an electromagnetic-actuator driver. The electromagnetic-actuator driver includes an asymmetric half-bridge circuit, and an actuating-signals output device. The actuating-signal output device outputs a signal for turning on one of a high-side switch and a low-side switch of the asymmetric half-bridge circuit, and outputs a pulse-width-modulated actuating signal for actuating the other one of them by means of pulse-width modulation based on the cyclic control signals, which the cyclic-control-signals output device outputs, or outputs a pulse-width-modulated actuating signal for actuating both of them by means of pulse-width modulation when the cyclic control signals are positive.
    Type: Application
    Filed: July 27, 2005
    Publication date: February 2, 2006
    Applicants: TOKAI RUBBER INDUSTRIES, LTD., AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hiroyuki Ichikawa, Takehiko Fushimi
  • Publication number: 20050184214
    Abstract: A method of setting control data by an active vibration isolation control system includes the steps of selecting, when a frequency of a pulse signal actually detected is superior to a predetermined frequency, appropriate control data selected from among predetermined data maps incorporating control data capable of securing, in accordance with various vehicle driving conditions respectively, a control condition in which operation of the vibrator is preferably controlled, calculating a deviation between the appropriate control data commensurate with the actual vehicle driving condition at the time of controlling and actually detected data representing vibration subjected to a vehicle specific position, the actually detected data obtained in terms of a same physics amount as a physics amount of the control data, and modifying the appropriate control data on the basis of the calculated deviation.
    Type: Application
    Filed: February 18, 2005
    Publication date: August 25, 2005
    Inventors: Daichi Mizushima, Takehiko Fushimi, Hiroyuki Ichikawa, Atsushi Muramatsu
  • Publication number: 20050187673
    Abstract: A method of generating action control data includes an actuator as a control object, a detector for detecting an actual measured data of an action signal in the actuator, and a data map including control data which can perform a preferable condition of control by activating the actuator. The method of generating action control data for activating the actuator in accordance with a driving condition appropriate at a time of controlling on the basis of an appropriate control data selected from the data map includes the steps of calculating a deviation between the appropriate control data and an actual measured data, modifying the appropriate control data on the basis of calculated deviation, and generating the modified appropriate control data as the action control data.
    Type: Application
    Filed: February 18, 2005
    Publication date: August 25, 2005
    Inventors: Daichi Mizushima, Takehiko Fushimi
  • Patent number: 6678177
    Abstract: A driving system of a bridge circuit for driving an inductance load turns OFF one of switching elements on either an upper arm connected to a power supply or a lower arm connected to a ground and turns ON the other one of the switching elements on the same arm when a pulse width modulation signal is OFF when a phase difference occurs between an electric current of a control signal with a sine wave and a voltage and when a polarity of the electric current differs from a polarity of the voltage, wherein the electric current is circulated via the other one of the switching elements, the flywheel diode connected to the one of the switching elements, and the inductance load.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: January 13, 2004
    Assignees: Aisin Seiki Kabushiki Kaisha, Tokai Rubber Industries, Ltd.
    Inventors: Kenji Asano, Takehiko Fushimi, Hiroyuki Ichikawa
  • Patent number: 6566816
    Abstract: A plurality of lamps 21 to 28 inclusive are supplied with a voltage one after another in sequence. A time duration during which the voltage is supplied to each of the lamps 21 to 28 inclusive is controlled in PWM fashion to restrict an amount of voltage supplied thereto. A current detect circuit portion 36 solely detects all of the voltages supplied to the lamps 21 to 28 inclusive, respectively. Each of the voltages exceeds a threshold value, a dead band between two adjacent voltage supply durations. Thus, it is possible to restrict possible electromagnetic noises which are generated upon voltage supply to lamps 21 to 28 inclusive in a vehicular lamp control apparatus in which the lamps 21 to 28 inclusive are supplied with voltage from a high voltage battery 11.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: May 20, 2003
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Takehiko Fushimi, Hiroshi Kajino, Katsuyoshi Mizumoto
  • Publication number: 20020191419
    Abstract: A driving system of a bridge circuit for driving an inductance load turns OFF one of switching elements on either an upper arm connected to a power supply or a lower arm connected to a ground and turns ON the other one of the switching elements on the same arm when a pulse width modulation signal is OFF when a phase difference occurs between an electric current of a control signal with a sine wave and a voltage and when a polarity of the electric current differs from a polarity of the voltage, wherein the electric current is circulated via the other one of the switching elements, the flywheel diode connected to the one of the switching elements, and the inductance load.
    Type: Application
    Filed: May 22, 2002
    Publication date: December 19, 2002
    Inventors: Kenji Asano, Takehiko Fushimi, Hiroyuki Ichikawa
  • Publication number: 20020047533
    Abstract: A plurality of lamps 21 to 28 inclusive are supplied with a voltage one after another in sequence. A time duration during which the voltage is supplied to each of the lamps 21 to 28 inclusive is controlled in PMW fashion to restrict an amount of voltage supplied thereto. A current detect circuit portion 36 solely detects all of the voltages supplied to the lamps 21 to 28 inclusive, respectively. Each of the voltages exceeds a threshold value, a dead band between two adjacent voltage supply durations. Thus, it is possible to restrict possible electromagnetic noises which are generated upon voltage supply to lamps 21 to 28 inclusive in a vehicular lamp control apparatus in which the lamps 21 to 28 inclusive are supplied with voltage from a high voltage battery 11.
    Type: Application
    Filed: September 19, 2001
    Publication date: April 25, 2002
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takehiko Fushimi, Hiroshi Kajino, Katsuyoshi Mizumoto
  • Patent number: 5791432
    Abstract: In a steering control apparatus for an automotive vehicle, there are provided a steering mechanism which is linked with a road wheel to be controlled, an actuator for actuating the steering mechanism, and a steering angle sensor which is arranged in the vicinity of the steering mechanism for detecting a steered position of the road wheel. The apparatus includes a first control circuit which is provided for setting a desired steering angle of the road wheel, and includes a second control circuit which is electrically connected to the first control circuit, and which controls a current to be fed into the actuator in response to a difference between the desired steering angle and an actual steering angle which is produced on the basis of the steered position detected by the steering angle sensor, to control a steering angle of the road wheel. The second control circuit is formed as one body with the steering angle sensor and arranged in the vicinity of the steering mechanism.
    Type: Grant
    Filed: April 17, 1996
    Date of Patent: August 11, 1998
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Takehiko Fushimi, Hisayasu Mase, Takeshi Hatano
  • Patent number: 5506776
    Abstract: The amount of wiring required in a steering control system is reduced, and a power loss which occurs in the wiring of the power system is also reduced. The influences of electric noises upon the wiring between sensors and a control unit is reduced, thus improving the reliability. The control unit 9 connected with sensors and a servo unit SVU each include an independent computer 1, 8, and are connected to each other through a communication line. The control unit 9 is disposed adjacent to the sensors, while the servo unit SVU is disposed adjacent to an actuator. Information relating to a target steer angle and which is transmitted is chosen to be a variance T.DELTA. thereof, and on the receiving end, T.DELTA. is accumulated to obtain a target steer angle T.theta.. A steer angle deviation 0e is transmitted from SVU to the control unit 9. The presence or absence of any abnormality occurring is examined by checking the period of signal reception and signal values.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: April 9, 1996
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Takehiko Fushimi, Hisayasu Mase, Takeshi Hatano, Tadaichi Matsumoto, Kazutaka Tamura
  • Patent number: 4972133
    Abstract: A fail-safe arrangement for an electrical power steering system is directed to providing a control arrangement for a power steering motor which will prevent abnormal operation from having adverse impact. The control system detects the welding or sticking together of closed relay contacs and functions to prevent such a situation by monitoring the motor terminal voltage so as to cut off power above a predetermined value regardless of position of the relay contacts.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: November 20, 1990
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Fumiaki Hirota, Takehiko Fushimi