Patents by Inventor Atsuhiko Yoneda

Atsuhiko Yoneda 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: 10298157
    Abstract: On the basis of an energization phase signal being output from a rotational phase sensor and changing its output at every predetermined rotational phase corresponding to a stepwise change (increase or decrease) in rotational phase, a motor controller switches a phase current passing through the corresponding phase coil, and changes the magnitude of the phase current passing through the corresponding phase coil such that an actual motor torque detected by a torque sensor coincides with a target motor torque.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: May 21, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Atsuhiko Yoneda
  • Patent number: 10160283
    Abstract: A relative velocity between a sprung mass and an unsprung mass of a vehicle is calculated by differentiating a stroke amount of an electromagnetic damper with respect to time. The relative velocity is compared with a predetermined value that is set in advance, and a determination is made whether or not the relative velocity is the predetermined value or higher. In a case where the relative velocity is lower than the predetermined value (relative velocity<predetermined value), a normal filter is selected, and a gain G of only an unsprung resonance frequency range is increased. On the other hand, in a case where the relative velocity is the predetermined value or higher (relative velocity?predetermined value), a delay inhibition filter is selected, and a gain of a high frequency range is increased compared to the normal filter.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: December 25, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Tomoya Toyohira, Takafumi Kato, Satoshi Ohno, Atsuhiko Yoneda
  • Publication number: 20180361816
    Abstract: An object of the present invention is to obtain an electromagnetic suspension apparatus capable of quickly reducing an influence of a mechanical frictional force generated in each part of an electromagnetic actuator. The electromagnetic suspension apparatus includes an electromagnetic actuator that generates a driving force related to a damping operation and an expansion and contraction, an information acquisition unit that acquires vehicle state information including a stroke speed of the electromagnetic actuator, an equivalent frictional force calculation unit that calculates an equivalent frictional force of the electromagnetic actuator based on the vehicle state information, and an ECU that calculates a target driving force of the electromagnetic actuator and controls the driving force of the electromagnetic actuator using the calculated target driving force. The ECU corrects the target driving force based on the equivalent frictional force calculated by the equivalent frictional force calculation unit.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 20, 2018
    Inventors: Satoshi OHNO, Atsuhiko YONEDA, Takafumi KATO, Tomoya TOYOHIRA
  • Publication number: 20180361814
    Abstract: An object of the present invention is to obtain an electromagnetic suspension apparatus capable of meeting a request to improve ride comfort irrespective of a magnitude of a spring constant preset in a spring member. The electromagnetic suspension apparatus includes an electromagnetic actuator that generates a driving force related to vibration damping of the vehicle body, an information acquisition unit that acquires information on a stroke position of the electromagnetic actuator, and an ECU that calculates a target driving force of the electromagnetic actuator and controls a driving force of the electromagnetic actuator using the calculated target driving force. When the stroke position acquired by the information acquisition unit is in a neutral range including a neutral position, the ECU corrects the target driving force so as to reduce a spring force related to the spring member as compared with when the stroke position is in a non-neutral range.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 20, 2018
    Inventors: Satoshi OHNO, Tomoya TOYOHIRA, Takafumi KATO, Atsuhiko YONEDA
  • Publication number: 20180361813
    Abstract: Provided is an electromagnetic suspension apparatus capable of achieving both of vibration isolation performance and road holding performance. The electromagnetic suspension apparatus includes an electromagnetic actuator, an information acquisition unit that acquires information on a stroke speed of the electromagnetic actuator and a state quantity of the vehicle, a plurality of filters in which individual gain characteristics are respectively set, a filter setting unit that selectively sets a filter having a gain characteristic suitable for the state quantity of the vehicle from among the plurality of filters, a filter processing unit that performs a filtering process on a stroke speed signal using the filter set by the filter setting unit, and a drive control unit that controls driving of the electromagnetic actuator based on relationship information between the stroke speed after the filtering process and a damping force corresponding to the stroke speed.
    Type: Application
    Filed: May 14, 2018
    Publication date: December 20, 2018
    Inventors: Satoshi OHNO, Tomoya TOYOHIRA, Takafumi KATO, Atsuhiko YONEDA
  • Publication number: 20180297434
    Abstract: An electromagnetic suspension device includes: an electromagnetic actuator which is disposed side by side with a spring member provided between a body and a wheel of a vehicle and which produces a driving force for damping operation and extending and contracting operation; an information acquisition unit which acquires the stroke position of the electromagnetic actuator; and an ECU which sets a target damping force and a target stretching force and controls a driving force of the electromagnetic actuator by using a target driving force based on the set target damping force and target stretching force. When the stroke position acquired by the information acquisition unit is in an end region close to a stroke end, the ECU corrects the target driving force such that the stroke position shifts from the end region toward a neutral region.
    Type: Application
    Filed: April 16, 2018
    Publication date: October 18, 2018
    Inventors: Satoshi OHNO, Tomoya TOYOHIRA, Takafumi KATO, Atsuhiko YONEDA
  • Publication number: 20180297433
    Abstract: An electromagnetic suspension device includes: an electromagnetic actuator that generates a driving force related to vibration damping of a vehicle body by an electric motor; a rotational angle acquisition unit that acquires a rotational angle of the electric motor; a rotational angle acceleration calculation unit that calculates a rotational angle acceleration of the electric motor based on the rotational angle; ECU that performs driving force control including inertia compensation control of the electromagnetic actuator based on the rotational angle acceleration; and a relative speed calculation unit that acquires a relative speed between above- and below-spring members. In an area in which a relative speed exceeds a predetermined relative speed threshold, the ECU corrects an amount of inertia compensation so that the amount of inertia compensation is decreased, as compared with an area in which a relative speed value is the relative speed threshold or less.
    Type: Application
    Filed: April 16, 2018
    Publication date: October 18, 2018
    Inventors: Satoshi OHNO, Atsuhiko YONEDA
  • Publication number: 20180156303
    Abstract: A vehicle suspension system (3) includes an electromagnetic damper (7) provided with a sprung member (8) and an unsprung member (9) to apply a drive force and a damping force between the sprung member and the unsprung member, and a control unit (10) for controlling the electromagnetic damper. A target load for the electromagnetic damper is determined based on the unsprung member demand load that attenuates a vertical vibration of the unsprung member, and the sprung member demand load that restrains a vertical displacement of the sprung member. An absolute value of the sprung member demand load is reduced when a sprung member frequency is in an unsprung member resonance frequency range.
    Type: Application
    Filed: May 15, 2017
    Publication date: June 7, 2018
    Inventors: Tomoya Toyohira, Takafumi Kato, Satoshi Ohno, Atsuhiko Yoneda
  • Publication number: 20180134111
    Abstract: A vehicle suspension system (3) is provided that allows attention eliciting information such as rumble strips, bumps and road markers to be conveyed to the vehicle operator substantially without detracting from the performance of the vehicle suspension system. A control unit (10) determines if a prescribed warning condition exists according to vehicle information and/or road surface information acquired by an information acquiring unit, and performs a warning control including an extending and retracting movement of the actuator interposed between an sprung member (8) and an unsprung member (9) of the vehicle at a prescribed frequency when the warning condition is determined.
    Type: Application
    Filed: May 15, 2017
    Publication date: May 17, 2018
    Inventors: Tomoya Toyohira, Takafumi Kato, Atsuhiko Yoneda
  • Patent number: 9783227
    Abstract: A vehicle steering device (11) is provided that performs steering of a vehicle in response to operation of a steering wheel (13) operated when the traveling direction of the vehicle is changed. The vehicle steering device (11) includes a first steering assist device having a first steering torque sensor (23), a first assist motor (51), and a first EPS control unit (37), and a second steering assist device having a second steering torque sensor (25), a second assist motor (57), and a second EPS control unit (39). The first and second EPS control units (37, 39) perform driving control of the first and second assist motors (51, 57) independently from each other. Even if either one of the two control units (37, 39) respectively controlling driving of the two assist motors (51, 57) fails into an abnormal situation, such an abnormal situation can be brought under control quickly and soundly.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: October 10, 2017
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuo Shimizu, Atsuhiko Yoneda, Yukihiro Wakakuwa
  • Publication number: 20170267051
    Abstract: A relative velocity between a sprung mass and an unsprung mass of a vehicle is calculated by differentiating a stroke amount of an electromagnetic damper with respect to time. The relative velocity is compared with a predetermined value that is set in advance, and a determination is made whether or not the relative velocity is the predetermined value or higher. In a case where the relative velocity is lower than the predetermined value (relative velocity<predetermined value), a normal filter is selected, and a gain G of only an unsprung resonance frequency range is increased. On the other hand, in a case where the relative velocity is the predetermined value or higher (relative velocity?predetermined value), a delay inhibition filter is selected, and a gain of a high frequency range is increased compared to the normal filter.
    Type: Application
    Filed: March 16, 2017
    Publication date: September 21, 2017
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Tomoya Toyohira, Takafumi Kato, Satoshi Ono, Atsuhiko Yoneda
  • Patent number: 9587997
    Abstract: A magnetostrictive torque sensor incorporated in an electric power steering apparatus includes first through fourth detection coils, which are disposed face-to-face with a magnetostrictive film across a bobbin winding holder that is disposed around an outer circumferential surface of the magnetostrictive film. A bobbin support, which supports the bobbin winding holder, is disposed on the bobbin winding holder at a central position in the axial direction of the first through fourth detection coils.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: March 7, 2017
    Assignee: Honda Motor Co., Ltd.
    Inventors: Koichi Fujita, Atsuhiko Yoneda
  • Patent number: 9533703
    Abstract: The steering device includes first and second motors for steering which have common electric characteristics; first and second current sensors detecting first and second current values in the first and second motor, respectively; and abnormality diagnosis units. The abnormality diagnosis units make an abnormality diagnosis indicating that the steering device is abnormal when difference between the first and second current values exceeds a predetermined threshold value. When some abnormality occurs in the current detecting units for detecting the magnitudes of a current flowing through the steering motor, an abnormality diagnosis is rapidly made by comparing the difference with the predetermined value.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: January 3, 2017
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yasuo Shimizu, Manabu Ikegaya, Atsuhiko Yoneda, Takashi Miyoshi, Yoshihiro Oniwa
  • Patent number: D770110
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: October 25, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Norio Okada, Hirohisa Miyazaki, Atsuhiko Yoneda, Mitsuhiro Shigeri, Masato Suzuki
  • Patent number: D770711
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: November 1, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Norio Okada, Hirohisa Miyazaki, Atsuhiko Yoneda, Mitsuhiro Shigeri, Masato Suzuki
  • Patent number: D776380
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: January 10, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Atsuhiko Yoneda, Hirohisa Miyazaki, Norio Okada, Mitsuhiro Shigeri, Masato Suzuki
  • Patent number: D776889
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: January 17, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Atsuhiko Yoneda, Hirohisa Miyazaki, Norio Okada, Mitsuhiro Shigeri, Masato Suzuki
  • Patent number: D779139
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: February 14, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Atsuhiko Yoneda, Hirohisa Miyazaki, Norio Okada, Mitsuhiro Shigeri, Masato Suzuki
  • Patent number: D779754
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: February 21, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hirohisa Miyazaki, Norio Okada, Atsuhiko Yoneda, Mitsuhiro Shigeri, Masato Suzuki
  • Patent number: D781515
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: March 14, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Norio Okada, Hirohisa Miyazaki, Atsuhiko Yoneda, Mitsuhiro Shigeri, Masato Suzuki