Patents by Inventor Yuichiro Tsukasaki

Yuichiro Tsukasaki 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: 20230347892
    Abstract: A drive assist apparatus for a vehicle includes: a driving environment recognizer recognizing driving environment information on outside of the vehicle; a target vehicle-to-vehicle distance setter setting a target preceding vehicle distance to a preceding vehicle; and a driving controller performing driving control for maintaining a preceding vehicle distance at the target preceding vehicle distance. When a vehicle driving path is congested, the target vehicle-to-vehicle distance setter sets an extended target preceding vehicle distance and a target following vehicle distance.
    Type: Application
    Filed: April 11, 2023
    Publication date: November 2, 2023
    Applicant: SUBARU CORPORATION
    Inventors: Taiki SUGIYAMA, Yuichiro TSUKASAKI, Yasushi TAKASO, Kouki TAKAYAMA
  • Publication number: 20210309288
    Abstract: An automatic steering control apparatus includes a road information recognition device, a travel state detector, and a steering angle control device. The road information recognition device recognizes road information ahead of a vehicle. The travel state detector detects information regarding a travel state of the vehicle. The steering angle control device controls a steering angle of the vehicle, on the basis of the road information and the information regarding the travel state, to allow the vehicle to move toward a target position ahead of the vehicle. The steering angle control device controls the steering angle, to allow at least a portion of a steering angle waveform to have a non-sinusoidal wave. The steering angle waveform represents a time change in the steering angle in a case where the vehicle travels while crossing repetitively an ideal travel locus to be obtained from the target position.
    Type: Application
    Filed: March 25, 2021
    Publication date: October 7, 2021
    Inventors: Yuichiro TSUKASAKI, Yasushi TAKASO
  • Patent number: 11084520
    Abstract: A steering apparatus for use in a vehicle equipped with a steer-by-wire system includes a shaft, a first reaction force member, and a second reaction force member. The shaft is configured to be able to rotate with rotation of a steering wheel disposed in a vehicle compartment. The first reaction force member is configured to apply a first reaction force in a direction opposite to a direction of the rotation of the shaft. The second reaction force member is configured to be able to apply and stop applying a second reaction force to the shaft. The second reaction force is different from the first reaction force and applied in a direction opposite to the direction of the rotation of the shaft. The second reaction force member applies the second reaction force when there is a decrease in the first reaction force.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: August 10, 2021
    Assignee: SUBARU CORPORATION
    Inventor: Yuichiro Tsukasaki
  • Patent number: 11052916
    Abstract: A conveyance amount controlling apparatus includes a control state detector, a road surface state detector, and at least one conveyance amount controller including a conveyance device conveying, to a driver, information representing a road surface state and a conveyance amount controlling device controlling a vibration conveyance amount as a conveyance amount of a vibration caused by a road surface irregularity. A second conveyance amount, as the vibration conveyance amount obtained when a road surface state amount less than a first threshold is detected by the road surface state detector, is less than a first conveyance amount, as the vibration conveyance amount obtained when execution of an automatic driving control is not detected by the control state detector. A third conveyance amount, as the vibration conveyance amount obtained when the road surface state amount equal to or greater than the first threshold is detected, is greater than the second conveyance amount.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: July 6, 2021
    Assignee: SUBARU CORPORATION
    Inventor: Yuichiro Tsukasaki
  • Publication number: 20190100232
    Abstract: A steering apparatus for use in a vehicle equipped with a steer-by-wire system includes a shaft, a first reaction force member, and a second reaction force member. The shaft is configured to be able to rotate with rotation of a steering wheel disposed in a vehicle compartment. The first reaction force member is configured to apply a first reaction force in a direction opposite to a direction of the rotation of the shaft. The second reaction force member is configured to be able to apply and stop applying a second reaction force to the shaft. The second reaction force is different from the first reaction force and applied in a direction opposite to the direction of the rotation of the shaft. The second reaction force member applies the second reaction force when there is a decrease in the first reaction force.
    Type: Application
    Filed: July 16, 2018
    Publication date: April 4, 2019
    Applicant: SUBARU CORPORATION
    Inventor: Yuichiro TSUKASAKI
  • Publication number: 20190092338
    Abstract: A conveyance amount controlling apparatus includes a control state detector, a road surface state detector, and at least one conveyance amount controller including a conveyance device conveying, to a driver, information representing a road surface state and a conveyance amount controlling device controlling a vibration conveyance amount as a conveyance amount of a vibration caused by a road surface irregularity. A second conveyance amount, as the vibration conveyance amount obtained when a road surface state amount less than a first threshold is detected by the road surface state detector, is less than a first conveyance amount, as the vibration conveyance amount obtained when execution of an automatic driving control is not detected by the control state detector. A third conveyance amount, as the vibration conveyance amount obtained when the road surface state amount equal to or greater than the first threshold is detected, is greater than the second conveyance amount.
    Type: Application
    Filed: July 16, 2018
    Publication date: March 28, 2019
    Applicant: SUBARU CORPORATION
    Inventor: Yuichiro TSUKASAKI
  • Patent number: 10086666
    Abstract: A coupling structure for vehicle chassis members couples a ball joint member and an axle housing used for a vehicle to each other. The structure includes a socket that has a substantially columnar external shape, is provided in the ball joint member, and has a socket bolt groove throughout a circumference in an outer circumferential surface of the socket. The structure also includes a collar that has a substantially cylindrical shape and is disposed so as to surround an outer circumferential surface of the socket. The axle housing has a coupling hole having a substantially columnar internal shape into which the socket is inserted. The ball joint member and the axle housing are coupled to each other by disposing the socket in the coupling hole while the socket is surrounded by the collar.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: October 2, 2018
    Assignee: SUBARU CORPORATION
    Inventors: Hidehisa Tomizawa, Toshi Ishida, Hajime Terasaki, Yoshiaki Utsugi, Masaru Kogure, Yuichiro Tsukasaki, Toshiyuki Hyuga, Noritaka Hayashi, Kensuke Ohshima
  • Patent number: 9802639
    Abstract: A steering apparatus includes: a pinion shaft coupled to a steering wheel and having a pinion; a rack shaft having a rack engaged with the pinion and a shaft back located on opposite side of the rack with an axial center of the rack shaft in between; a rack shaft housing that houses and slidably supports the rack shaft; and a rack shaft supporting mechanism having a pressure applying member that applies a pressure onto the shaft back toward the pinion. The shaft back includes a predetermined region provided across a midpoint of the rack which corresponds to a neutral position of the steering wheel. The predetermined region is a right-to-left steering wheel angle region having a height higher than a height of any other region of the shaft back.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: October 31, 2017
    Assignee: SUBARU CORPORATION
    Inventors: Yuichiro Tsukasaki, Masaru Kogure, Hiroyuki Ooiwa, Mitsuharu Minami
  • Publication number: 20160221599
    Abstract: A steering apparatus includes: a pinion shaft coupled to a steering wheel and having a pinion; a rack shaft having a rack engaged with the pinion and a shaft back located on opposite side of the rack with an axial center of the rack shaft in between; a rack shaft housing that houses and slidably supports the rack shaft; and a rack shaft supporting mechanism having a pressure applying member that applies a pressure onto the shaft back toward the pinion. The shaft back includes a predetermined region provided across a midpoint of the rack which corresponds to a neutral position of the steering wheel. The predetermined region is a right-to-left steering wheel angle region having a height higher than a height of any other region of the shaft back.
    Type: Application
    Filed: February 3, 2016
    Publication date: August 4, 2016
    Inventors: Yuichiro TSUKASAKI, Masaru KOGURE, Hiroyuki OOIWA, Mitsuharu MINAMI
  • Publication number: 20160089943
    Abstract: A coupling structure for vehicle chassis members couples a ball joint member and an axle housing used for a vehicle to each other. The structure includes a socket that has a substantially columnar external shape, is provided in the ball joint member, and has a socket bolt groove throughout a circumference in an outer circumferential surface of the socket. The structure also includes a collar that has a substantially cylindrical shape and is disposed so as to surround an outer circumferential surface of the socket. The axle housing has a coupling hole having a substantially columnar internal shape into which the socket is inserted. The ball joint member and the axle housing are coupled to each other by disposing the socket in the coupling hole while the socket is surrounded by the collar.
    Type: Application
    Filed: September 21, 2015
    Publication date: March 31, 2016
    Inventors: Hidehisa TOMIZAWA, Toshi ISHIDA, Hajime TERASAKI, Yoshiaki UTSUGI, Masaru KOGURE, Yuichiro TSUKASAKI, Toshiyuki HYUGA, Noritaka HAYASHI, Kensuke OHSHIMA
  • Patent number: 9193388
    Abstract: A suspension device has longitudinal force compliance steer properties to steer a rear wheel to toe-in or toe-out according to increase in longitudinal force applied to wheel treads of a rear wheel. The suspension device includes: a hub bearing housing; suspension links having both edges pivotally attached to a vehicle body and a hub bearing respectively, to support the hub bearing housing; a suspension spring generating reaction force corresponding to relative displacement amount in the longitudinal direction of the hub bearing housing as to the vehicle body; a damper generating damping force corresponding to relative speed in the longitudinal direction of the hub bearing housing as to the vehicle body; and a toe change generating unit generating toe change in a direction where toe change due to longitudinal force compliance properties is temporarily cancelled out or suppressed at an early stage of turning of the vehicle.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: November 24, 2015
    Assignee: FUJI JUKOGYO KABUSHIKI KAISHA
    Inventors: Masaru Kogure, Yuichiro Tsukasaki, Masahiro Saito, Kazuya Morota, Kenji Watanuki, Toshiyuki Hyuga, Daisuke Yamada, Kensuke Ohshima, Yoshiaki Utsugi, Masato Nakatake, Takashi Kogure, Kazuya Ando, Hidehisa Tomizawa, Masashi Imoto, Toshi Ishida
  • Publication number: 20140291944
    Abstract: A suspension device has longitudinal force compliance steer properties to steer a rear wheel to toe-in or toe-out according to increase in longitudinal force applied to wheel treads of a rear wheel. The suspension device includes: a hub bearing housing; suspension links having both edges pivotally attached to a vehicle body and a hub bearing respectively, to support the hub bearing housing; a suspension spring generating reaction force corresponding to relative displacement amount in the longitudinal direction of the hub bearing housing as to the vehicle body; a damper generating damping force corresponding to relative speed in the longitudinal direction of the hub bearing housing as to the vehicle body; and a toe change generating unit generating toe change in a direction where toe change due to longitudinal force compliance properties is temporarily cancelled out or suppressed at an early stage of turning of the vehicle.
    Type: Application
    Filed: March 27, 2014
    Publication date: October 2, 2014
    Applicant: FUJI JUKOGYO KABUSHIKI KAISHA
    Inventors: Masaru KOGURE, Yuichiro TSUKASAKI, Masahiro SAITO, Kazuya MOROTA, Kenji WATANUKI, Toshiyuki HYUGA, Daisuke YAMADA, Kensuke OHSHIMA, Yoshiaki UTSUGI, Masato NAKATAKE, Takashi KOGURE, Kazuya ANDO, Hidehisa TOMIZAWA, Masashi IMOTO, Toshi ISHIDA
  • Patent number: 8544862
    Abstract: In a vehicle steering device, extendable portions whose elastic properties corresponding to a force acting in a compressing direction and whose elastic properties corresponding to a force acting in a stretching direction are asymmetrical are disposed in a symmetric fashion at intermediate sections of tie rods. Thus, an effective steering gear ratio with respect to leftward and rightward steering can be properly changed in accordance with a vehicle speed by using a simple configuration that does not use a complex mechanism having a motor. In this case, a steering gear ratio can be mainly changed for one of the wheels, while a linear lateral force corresponding to steering can be generated at the other wheel. Moreover, since the steering gear ratio can be changed mechanically without performing motor control, the occurrence of control delay can be prevented, thereby reliably preventing deterioration of the driver's operational feel.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: October 1, 2013
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Yuichiro Tsukasaki
  • Patent number: 8364347
    Abstract: A small-size, highly-reliable left-right independent steering device is provided without having to make significant modifications to existing vehicles or to develop dedicated vehicles. The device includes tie rods linked to left and right front wheels and axially expandable and contractible by means of small-size telescopic mechanism portions defined by ball-screw-type linear actuators. Each telescopic mechanism portion mainly includes a main body to which a tie-rod end of the corresponding tie rod is fixed, and an electric motor serving as an actuator attached substantially perpendicularly to the main body. The other end of the tie rod is coupled to a steering rod and functions as a piston rod that can advance or recede in the axial direction by means of the telescopic mechanism portion. Thus, the telescopic mechanism portions are mountable within tire wheels at positions free of, for example, suspension arms and stabilizers located near the tie rods.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: January 29, 2013
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Yuichiro Tsukasaki, Masaru Kogure
  • Patent number: 8346434
    Abstract: When a vehicle is turning, it is determined whether an inside turning wheel has sufficient grip force. If the inside wheel has sufficient grip force, left and right forces orthogonally input to the vehicle body are calculated based on longitudinal and lateral tire forces, and are checked if there is a difference in the left and right forces. If there is such a left-right force difference and the vehicle is not undergoing a braking operation, the turning angle of the inside wheel is corrected using a left-right independent steering device that independently controls the turning angles of left and right wheels, so that the difference becomes zero. Thus, the difference in left and right forces laterally input to the vehicle body is reduced to minimize a jack-up force. This improves the driving stability and achieves a good roll feel by means of a jack-down force, thereby achieving improved driving feel.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: January 1, 2013
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Yuichiro Tsukasaki, Masaru Kogure
  • Patent number: 8224564
    Abstract: A control unit sets a current total risk function for each of white lines, guardrails, side walls, and three-dimensional objects existing around a vehicle, estimates a temporal change in the position of each object, and calculates a minimum of the total risk function at the vehicle position for each time. An objective function is generated for the time, and a turning control amount that minimizes the objective function at the time is calculated as a turning control amount of the vehicle. Risk functions provided when the vehicle moves by the turning control amount are set for respective routes. A final avoidance route is selected from the risk functions of the routes, and steering and braking are controlled.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: July 17, 2012
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Toyokazu Ogasawara, Yuichiro Tsukasaki
  • Patent number: 8165750
    Abstract: The objective of the present invention is to provide a vehicle motion control device capable of controlling the driving force distribution to the wheels with superior stability and response while effectively utilizing the tire grip.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: April 24, 2012
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Yuichiro Tsukasaki, Masaru Kogure
  • Publication number: 20110233886
    Abstract: In a vehicle steering device, extendable portions whose elastic properties corresponding to a force acting in a compressing direction and whose elastic properties corresponding to a force acting in a stretching direction are asymmetrical are disposed in a symmetric fashion at intermediate sections of tie rods. Thus, an effective steering gear ratio with respect to leftward and rightward steering can be properly changed in accordance with a vehicle speed by using a simple configuration that does not use a complex mechanism having a motor. In this case, a steering gear ratio can be mainly changed for one of the wheels, while a linear lateral force corresponding to steering can be generated at the other wheel. Moreover, since the steering gear ratio can be changed mechanically without performing motor control, the occurrence of control delay can be prevented, thereby reliably preventing deterioration of the driver's operational feel.
    Type: Application
    Filed: March 21, 2011
    Publication date: September 29, 2011
    Applicant: FUJI JUKOGYO KABUSHIKI KAISHA
    Inventor: Yuichiro Tsukasaki
  • Publication number: 20110166738
    Abstract: The objective of the present invention is to provide a vehicle motion control device capable of controlling the driving force distribution to the wheels with superior stability and response while effectively utilizing the tire grip.
    Type: Application
    Filed: January 25, 2011
    Publication date: July 7, 2011
    Applicant: FUJI JUKOGYO KABUSHIKI KAISHA
    Inventors: Yuichiro TSUKASAKI, Masaru Kogure
  • Patent number: 7890230
    Abstract: The objective of the present invention is to provide a vehicle motion control device capable of controlling the driving force distribution to the wheels with superior stability and response while effectively utilizing the tire grip.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: February 15, 2011
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Yuichiro Tsukasaki, Masaru Kogure