Patents by Inventor Yusaku Yamamoto

Yusaku Yamamoto 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: 20240140376
    Abstract: A braking control device includes a control unit that controls a braking force in accordance with an operation amount of a braking operation member, and a braking determination unit that determines whether or not a reduction in the operation amount of the braking operation member has been started when the braking force is applied to a vehicle due to the operation of the braking operation member. In a case where a reduction rate of the operation amount upon determination that the reduction in the operation amount has been started is equal to or larger than a reduction rate determination value, the control unit starts limitation processing of providing a limitation to the reduction rate of the braking force against the vehicle.
    Type: Application
    Filed: March 30, 2022
    Publication date: May 2, 2024
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20240132035
    Abstract: A vehicle which adopts a control device as a braking control device includes a sensor that acquires a rotation angle of a wheel. The control device includes a first distance calculation unit, a second distance calculation unit, and a braking control unit. The first distance calculation unit sets a braking force corresponding to a braking operation member operation amount as a reference braking force, estimates vehicle longitudinal acceleration based on the reference braking force, and calculates a braking force reference distance estimating a moving distance until the vehicle stops based on the longitudinal acceleration. The second distance calculation unit calculates a wheel reference distance estimating the vehicle moving distance based on a detection signal of the sensor and a wheel diameter. The braking control unit executes feedback control for controlling the vehicle braking force so that a difference between the braking force reference distance and the wheel reference distance decreases.
    Type: Application
    Filed: March 28, 2022
    Publication date: April 25, 2024
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Patent number: 11958384
    Abstract: The control device includes a vehicle required braking force acquisition unit that acquires a vehicle required braking force that is a required value of the braking force applied to the vehicle, and a roll control unit that controls the rolling motion of the vehicle by adjusting a distribution ratio of the braking force with respect to a target wheel including at least one of a rear wheel on an inside during turning and a front wheel on an outside during turning of the vehicle when the braking force is applied to the vehicle according to the vehicle required braking force under a situation where the vehicle is turning.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: April 16, 2024
    Assignee: ADVICS CO., LTD.
    Inventor: Yusaku Yamamoto
  • Publication number: 20240074318
    Abstract: [Object] To provide a transducer capable of providing a high degree of freedom in deformation and suppressing a risk of breakage and a method of producing the transducer. [Solving Means] In order to achieve the above-described object, a transducer according to an embodiment of the present technology includes an elastomer. The elastomer extends along a predetermined axis direction, and has both end portions in which at least two electrodes having followability are disposed on both sides around a predetermined axis in the predetermined axis direction, the both end portions being elongated to be folded in a direction perpendicular to the predetermined axis. This makes it possible to provide a high degree of freedom in deformation and to suppress a risk of breakage.
    Type: Application
    Filed: December 9, 2021
    Publication date: February 29, 2024
    Inventors: YUSAKU KATO, AKIHIRO NAKATA, RYO IWAMURO, DAISUKE YAMAMOTO, HIROYUKI MITSUHASHI, YOSHIO GOTO
  • Publication number: 20230356601
    Abstract: A braking control device adjusts a regenerative braking force and a friction braking force applied to a vehicle. The braking control device includes a stopping distance acquisition unit that acquires a distance moved until the vehicle in travel stops, as a stopping distance. The braking control device includes a brake adjustment unit that starts replacement control to replace the regenerative braking force among braking forces, which are applied to the vehicle, with the friction braking force, when the stopping distance becomes smaller than a replacement determination value.
    Type: Application
    Filed: September 30, 2021
    Publication date: November 9, 2023
    Applicant: ADVICS CO., LTD.
    Inventors: Yusaku YAMAMOTO, Kazuaki YOSHIDA
  • Publication number: 20230331201
    Abstract: A brake control device is applied to a brake device that controls a front-wheel braking force and a rear-wheel braking force. The brake control device includes a ratio calculation circuit that calculates a target front and rear braking force distribution ratio based on a target pitch angle, and a brake control circuit that performs a stability control by operating the brake device based on the target front and rear braking force distribution ratio during braking.
    Type: Application
    Filed: June 27, 2023
    Publication date: October 19, 2023
    Applicant: ADVICS CO.., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20230331204
    Abstract: A vehicle stop determination device includes: a vehicle wheel speed sensor that outputs a signal according to a rotational speed of vehicle wheels; an acquisition unit that acquires a wheel speed at a predetermined reference time that a vehicle decelerates, based on an output signal of the vehicle wheel speed sensor; a derivation unit that derives a stopping position where the vehicle stops, based on the wheel speed acquired by the acquisition unit; and a determination unit that executes a stop determination to determine that the vehicle has stopped, when a difference distance between a position of the vehicle after the reference time and the stopping position is a stop determination value or less.
    Type: Application
    Filed: September 30, 2021
    Publication date: October 19, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20230303042
    Abstract: A braking control device executes pre-stop braking control to adjust a braking force when a vehicle stops. The pre-stop braking control includes reduction control that reduces the braking force, and increase control that is executed before the reduction control is started, to increase the braking force. An increasing unit executes the increase control, and a reducing unit executes the reduction control. A calculation unit calculates a braking distance extended by the reduction control, as an extended distance, and calculates a braking distance shortened by the increase control, as a shortened distance. The calculation unit calculates the extended distance to become longer when an operation amount of a braking operation member operated by a driver is reduced during braking than when the operation amount is not reduced. When a difference between the extended distance and the shortened distance is less than a determination value, the reducing unit starts the reduction control.
    Type: Application
    Filed: September 30, 2021
    Publication date: September 28, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Patent number: 11731598
    Abstract: A brake control device includes: a decrease determination unit that determines whether a requested braking force for a vehicle is decreasing; and a brake control unit which, on the condition that the decrease determination unit determines that the requested braking force is decreasing during deceleration of the vehicle, executes ratio change decrease control of reducing the braking force of the vehicle according to the decrease of the requested braking force, while making a braking force distribution ratio smaller than a reference braking force distribution ratio. The reference braking force distribution ratio is the braking force distribution ratio at a time point when the requested braking force starts to decrease.
    Type: Grant
    Filed: December 25, 2019
    Date of Patent: August 22, 2023
    Assignee: ADVICS CO., LTD.
    Inventor: Yusaku Yamamoto
  • Publication number: 20230219542
    Abstract: The braking control device includes a control amount derivation unit that derives a target vehicle braking force representing a target value of a vehicle braking force applied, and a braking control unit that controls a regenerative braking device and a frictional braking device based on the target vehicle braking force. When the target vehicle braking force is increased, the braking control unit executes a braking force application process of increasing the frictional braking force applied to the wheel so that such frictional braking force becomes larger than the regenerative braking force applied to the wheel. When the target vehicle braking force is increased, the braking control unit executes a switching process of switching at least a part of the frictional braking force applied to the wheel to the regenerative braking force to increase the regenerative braking force applied to the wheel after execution of the braking force application process.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 13, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20230219544
    Abstract: A braking control device includes a braking control unit that controls a braking device, a load reduction amount derivation unit that derives a reduction amount of a load input from a vehicle body to a suspension for a second wheel, and an anti-force derivation unit that derives an anti-lift force. The braking control unit performs posture braking processing of adjusting the second braking force so that the difference between the reduction amount of the load and the anti-lift force is less than or equal to a difference determination value, and adjusting the first braking force so that the vehicle braking force becomes the required value.
    Type: Application
    Filed: January 22, 2021
    Publication date: July 13, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Patent number: 11677208
    Abstract: An optical amplification device includes a first Raman amplifier outputs a first excitation light to a transmission line in a same direction as a signal light, and a second Raman amplifier outputs a second excitation light to the transmission line in an opposite direction to the signal light. The first Raman amplifier includes a first detector detects a first power of a first transmitted light transmitted through a first optical filter. The second Raman amplifier includes a second detector detects second power of a second transmitted light transmitted through a second optical filter. The first Raman amplifier stops output of the first excitation light when the first power is higher than a threshold. The second Raman amplifier stops output of the second excitation light when the second power is reduced from power of the first excitation light transmitted through the second optical filter.
    Type: Grant
    Filed: April 19, 2021
    Date of Patent: June 13, 2023
    Assignee: FUJITSU LIMITED
    Inventor: Yusaku Yamamoto
  • Patent number: 11648919
    Abstract: A braking control device includes a first control unit configured to execute first control for reducing a target braking force, which is either a front-wheel braking force to be applied to front wheels of a vehicle or a rear-wheel braking force to be applied to rear wheels during increasing of deceleration of the vehicle, in a case that a behavior of the vehicle is unstable as the target braking force is increased; and a second control unit configured to execute second control for reducing a rate of increase in the target braking force and increasing a rate of increase in the front-wheel braking force or the rear-wheel braking force, which is not the target braking force, prior to execution of the first control.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: May 16, 2023
    Assignee: ADVICS CO., LTD.
    Inventor: Yusaku Yamamoto
  • Publication number: 20230063777
    Abstract: A braking control device, when stopping a vehicle in a state where a braking force is being applied to the vehicle, executes a reducing control of reducing the braking force corresponding to a braking request before the vehicle stops and executes an increasing control of increasing the braking force corresponding to the braking request before the reducing control in order to suppress vehicle pitching behavior generated when the braking force is applied to the vehicle. The control device sets braking force increase amount in the increasing control based on a difference distance that is a difference between a first distance correlated with a vehicle traveling distance from a reduction start timing when the reducing control is executed until the stopping of the vehicle and a second distance correlated with a vehicle traveling distance from the reduction start timing when the reducing control is not executed until the stopping of the vehicle.
    Type: Application
    Filed: January 14, 2021
    Publication date: March 2, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20230025963
    Abstract: A control device includes: a first braking unit, that applies a first braking force to a steering wheel of a vehicle; a second braking unit, that applies a second braking force to a non-steering wheel of the vehicle; and a control device that controls the first braking unit, and the second braking unit, according to a target braking force, where the control device includes a steering angle information acquiring unit that acquires a steering angle-related value related to a steering angle of the steering wheel, and a distribution changing unit that executes a distribution change control of changing a braking force distribution between the first braking force and the second braking force based on the steering angle-related value when the target braking force is applied.
    Type: Application
    Filed: January 14, 2021
    Publication date: January 26, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20230008900
    Abstract: A vehicle control device includes: an acquiring unit that acquires vehicle height information from a link mechanism type vehicle height sensor that is connected to a lower arm of a suspension that connects a vehicle body and wheels of a vehicle; a storage unit that stores vehicle height error information, which is information representing a relationship between an acting force that is applied to the vehicle in a horizontal direction and an error that is contained in the vehicle height information that is output by the vehicle height sensor; and a correcting unit that corrects the vehicle height information that has been acquired by the acquiring unit, based on the acting force that acts when the vehicle height information is acquired and the vehicle height error information that is stored in the storage unit.
    Type: Application
    Filed: December 24, 2020
    Publication date: January 12, 2023
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20220194336
    Abstract: A braking control device includes: a control unit that is configured to control front-wheel braking power and rear-wheel braking power based on braking power distribution and requested braking power; a distribution setting unit that is configured to set the braking power distribution; and a slip judgment unit that is configured to judge whether or not the vehicle is in a rear-wheel-led slip state. If it is judged that the vehicle is in the rear-wheel-led slip state when the braking power distribution is first braking power distribution, the distribution setting unit executes a distribution shifting process of shifting the braking power distribution to second braking power distribution within a predetermined period. The second braking power distribution is such distribution that the rear-wheel braking power is reduced relative to that observed when the first braking power distribution is set as the braking power distribution.
    Type: Application
    Filed: February 12, 2020
    Publication date: June 23, 2022
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20220144229
    Abstract: A brake control device includes: a decrease determination unit that determines whether a requested braking force for a vehicle is decreasing; and a brake control unit which, on the condition that the decrease determination unit determines that the requested braking force is decreasing during deceleration of the vehicle, executes ratio change decrease control of reducing the braking force of the vehicle according to the decrease of the requested braking force, while making a braking force distribution ratio smaller than a reference braking force distribution ratio. The reference braking force distribution ratio is the braking force distribution ratio at a time point when the requested braking force starts to decrease.
    Type: Application
    Filed: December 25, 2019
    Publication date: May 12, 2022
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20220105809
    Abstract: The control device includes a vehicle required braking force acquisition unit that acquires a vehicle required braking force that is a required value of the braking force applied to the vehicle, and a roll control unit that controls the rolling motion of the vehicle by adjusting a distribution ratio of the braking force with respect to a target wheel including at least one of a rear wheel on an inside during turning and a front wheel on an outside during turning of the vehicle when the braking force is applied to the vehicle according to the vehicle required braking force under a situation where the vehicle is turning.
    Type: Application
    Filed: January 24, 2020
    Publication date: April 7, 2022
    Applicant: ADVICS CO., LTD.
    Inventor: Yusaku YAMAMOTO
  • Publication number: 20210391681
    Abstract: An optical amplification device includes a first Raman amplifier outputs a first excitation light to a transmission line in a same direction as a signal light, and a second Raman amplifier outputs a second excitation light to the transmission line in an opposite direction to the signal light. The first Raman amplifier includes a first detector detects a first power of a first transmitted light transmitted through a first optical filter. The second Raman amplifier includes a second detector detects second power of a second transmitted light transmitted through a second optical filter. The first Raman amplifier stops output of the first excitation light when the first power is higher than a threshold. The second Raman amplifier stops output of the second excitation light when the second power is reduced from power of the first excitation light transmitted through the second optical filter.
    Type: Application
    Filed: April 19, 2021
    Publication date: December 16, 2021
    Applicant: FUJITSU LIMITED
    Inventor: Yusaku YAMAMOTO