Patents by Inventor Kazumi Hoshiya

Kazumi Hoshiya 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: 11524577
    Abstract: A vehicle control system configured to reduce physical stress on a driver to operate an accelerator pedal without reducing acceleration feel. The vehicle control system selects a first driving force property if an estimated stress on an ankle is less than a threshold value, and selects a second driving force property if the estimated stress on the ankle is greater than the threshold value to reduce the stress on the ankle. When the second driving force property is selected, a target driving force is reduced less than a target driving force calculated based on the first driving force property. In this case, the vehicle control system reduces a difference between: a ratio of acceleration to a pedal force given that the first driving force property is selected; and a ratio of acceleration to the pedal force given that the second driving force property is selected.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: December 13, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuki Mizukami, Kuninori Kumagai, Satoshi Yamanaka, Kazumi Hoshiya
  • Publication number: 20220340006
    Abstract: A vehicle control system configured to reduce physical stress on a driver to operate an accelerator pedal without reducing acceleration feel. The vehicle control system selects a first driving force property if an estimated stress on an ankle is less than a threshold value, and selects a second driving force property if the estimated stress on the ankle is greater than the threshold value to reduce the stress on the ankle. When the second driving force property is selected, a target driving force is reduced less than a target driving force calculated based on the first driving force property. In this case, the vehicle control system reduces a difference between: a ratio of acceleration to a pedal force given that the first driving force property is selected; and a ratio of acceleration to the pedal force given that the second driving force property is selected.
    Type: Application
    Filed: March 24, 2022
    Publication date: October 27, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuki MIZUKAMI, Kuninori KUMAGAI, Satoshi YAMANAKA, Kazumi HOSHIYA
  • Patent number: 11292451
    Abstract: A hybrid vehicle in which a running mode can be appropriately shifted without making a driver feel uncomfortable or feel a sense of slowness. A hybrid vehicle includes an engine, a first motor, a second motor, and a clutch that selectively transmits power between the engine and drive wheels. A controller shifts a running mode to the parallel hybrid vehicle mode in a case of accelerating the hybrid vehicle in the electric vehicle mode, if the drive force is greater than a maximum drive force generatable in the electric vehicle mode, and also greater than a required additional drive force as a variable corresponding to a running resistance against the hybrid vehicle running on a predetermined running road at a predetermined vehicle speed by a predetermined drive force that is set in advance based on the vehicle speed and the drive force.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: April 5, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsuhiko Yokota, Hideo Watanabe, Kazumi Hoshiya, Satoshi Yamanaka, Jonggap Kim
  • Patent number: 11208112
    Abstract: A drive force control system for a vehicle having a motor and a battery that allows a driver to sense a satisfactory acceleration even if an output torque of a motor is restricted. The drive force control system comprises a controller that calculates an upper limit acceleration of the vehicle based on an upper limit power to be supplied from the battery to the motor. The controller sets a reference jerk as the required jerk when the upper limit acceleration is equal to or greater than the target acceleration, and sets a corrected jerk that is greater than the reference jerk as the required jerk when the upper limit acceleration is less than the target acceleration.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: December 28, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Kazumi Hoshiya
  • Publication number: 20200207327
    Abstract: A control system for a hybrid vehicle configured to smoothly engage an engagement device while reducing a collision noise of the engagement device. The control system is configured to apply torque to a set of teeth on one half of the engagement device to shift a phase of the set of teeth in the event of teeth interference. After the completion of engagement of the engagement device, the control system further applies torque to the set of teeth on one half of the engagement device to reduce backlash between the set of teeth on one half of the engagement device and a set of teeth on the other half of the engagement device.
    Type: Application
    Filed: December 19, 2019
    Publication date: July 2, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya IMAMURA, Takahiro YOKOKAWA, Hideo WATANABE, Kazumi HOSHIYA, Hirokazu KATO, Minoru KATO, Kensei HATA
  • Publication number: 20200139986
    Abstract: A drive force control system for a vehicle having a motor and a battery that allows a driver to sense a satisfactory acceleration even if an output torque of a motor is restricted. The drive force control system comprises a controller that calculates an upper limit acceleration of the vehicle based on an upper limit power to be supplied from the battery to the motor. The controller sets a reference jerk as the required jerk when the upper limit acceleration is equal to or greater than the target acceleration, and sets a corrected jerk that is greater than the reference jerk as the required jerk when the upper limit acceleration is less than the target acceleration.
    Type: Application
    Filed: October 7, 2019
    Publication date: May 7, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Kazumi HOSHIYA
  • Patent number: 10605359
    Abstract: A shift control device for establishing a desired gear stage promptly while reducing a shock, during propulsion while disengaging all of engagement devices of a transmission. The shift control system compares a target stage set based on an operating data to an interim stage set based on the operating data immediately before the target stage is set. If the target stage is lower than the initial stage the engagement devices are engaged to establish the target stage without establishing the initial stage.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: March 31, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Jonggap Kim, Kazumi Hoshiya, Atsuhiko Yokota, Satoshi Yamanaka
  • Publication number: 20190170245
    Abstract: A shift control device for establishing a desired gear stage promptly while reducing a shock, during propulsion while disengaging all of engagement devices of a transmission. The shift control system compares a target stage set based on an operating data to an interim stage set based on the operating data immediately before the target stage is set. If the target stage is lower than the initial stage the engagement devices are engaged to establish the target stage without establishing the initial stage.
    Type: Application
    Filed: November 21, 2018
    Publication date: June 6, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Jonggap KIM, Kazumi HOSHIYA, Atsuhiko YOKOTA, Satoshi YAMANAKA
  • Publication number: 20190126908
    Abstract: A hybrid vehicle in which a running mode can be appropriately shifted without making a driver feel uncomfortable or feel a sense of slowness. A hybrid vehicle includes an engine, a first motor, a second motor, and a clutch that selectively transmits power between the engine and drive wheels. A controller shifts a running mode to the parallel hybrid vehicle mode in a case of accelerating the hybrid vehicle in the electric vehicle mode, if the drive force is greater than a maximum drive force generatable in the electric vehicle mode, and also greater than a required additional drive force as a variable corresponding to a running resistance against the hybrid vehicle running on a predetermined running road at a predetermined vehicle speed by a predetermined drive force that is set in advance based on the vehicle speed and the drive force.
    Type: Application
    Filed: October 31, 2018
    Publication date: May 2, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsuhiko YOKOTA, Hideo WATANABE, Kazumi HOSHIYA, Satoshi YAMANAKA, Jonggap KIM
  • Patent number: 10093300
    Abstract: A vehicle control system to reduce shocks under an autonomous mode is provided. The vehicle control system is configured to select an operating mode of a vehicle from a manual mode in which a driving force and a braking force are controlled manually by a driver, and an autonomous mode in which the driving force and the braking force are controlled autonomously. A controller is configured to execute a fuel cut-off control, and a threshold selected under the autonomous mode is set in such a manner as to terminate the fuel cut-off control earlier than under the manual mode.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: October 9, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji Kuwahara, Kazumi Hoshiya, Norimi Asahara, Yoshio Ito, Takahito Endo, Tadashi Fujiyoshi
  • Patent number: 9902393
    Abstract: A vehicle control system is provided to ensure acceleration response while improving energy efficiency in an autonomous vehicle in which an operating mode is selected from an autonomous mode and a manual mode. A switching device is disposed between a motor and drive wheels to switch a driving mode between a direct drive mode and a differential drive mode. A controller executes a motor-idling control to keep a speed of the motor to a standby speed during propulsion in a motor-standby mode. The controller is configured to select a first standby speed of a motor idling control in a case that the vehicle is propelled in the manual mode, and to select a second standby speed that is lower than the first standby speed in a case that the vehicle is propelled in the autonomous mode.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: February 27, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahito Endo, Kazumi Hoshiya, Yoshio Ito, Norimi Asahara, Seiji Kuwahara, Tadashi Fujiyoshi, Yuji Iwase
  • Patent number: 9896109
    Abstract: A vehicle control system configured to suppress engine noise in an autonomous mode is provided. An operating mode of the vehicle can be switched between a manual mode in which a driving force and a braking force of the vehicle are controlled by a manual operation and an autonomous mode in which the driving force and the braking force of the vehicle are controlled autonomously. The vehicle control system is configured to shift an upshifting point for reducing a speed ratio of a transmission to a low speed side in the autonomous mode, in comparison with the upshifting point set in the manual mode.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: February 20, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji Kuwahara, Kazumi Hoshiya, Norimi Asahara, Yoshio Ito, Takahito Endo, Tadashi Fujiyoshi
  • Patent number: 9873434
    Abstract: A vehicle control system is provided to improve energy efficiency of a vehicle that can be operated not only manually but also autonomously. The vehicle control system is configured to deliver oil to an oil requiring site in a first feeding amount under the manual mode, and to deliver oil to the oil requiring site in a second feeding amount that is smaller than the first feeding amount during propulsion under the autonomous mode in line with a travel plan. When a required amount of oil delivered to the oil requiring site is expected to be increased based on the travel plan under the autonomous mode, the controller increases an oil feeding amount to the oil requiring site from the second feeding amount.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: January 23, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahito Endo, Kazumi Hoshiya, Yoshio Ito, Norimi Asahara, Seiji Kuwahara, Tadashi Fujiyoshi, Yuji Iwase
  • Publication number: 20170066436
    Abstract: A vehicle control system is provided to ensure acceleration response while improving energy efficiency in an autonomous vehicle in which an operating mode is selected from an autonomous mode and a manual mode. A switching device is disposed between a motor and drive wheels to switch a driving mode between a direct drive mode and a differential drive mode. A controller executes a motor-idling control to keep a speed of the motor to a standby speed during propulsion in a motor-standby mode. The controller is configured to select a first standby speed of a motor idling control in a case that the vehicle is propelled in the manual mode, and to select a second standby speed that is lower than the first standby speed in a case that the vehicle is propelled in the autonomous mode.
    Type: Application
    Filed: August 12, 2016
    Publication date: March 9, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahito ENDO, Kazumi HOSHIYA, Yoshio ITO, Norimi ASAHARA, Seiji KUWAHARA, Tadashi FUJIYOSHI, Yuji IWASE
  • Publication number: 20160349755
    Abstract: A vehicle control system configured to ensure running stability of a vehicle even if a vehicle weight is heavy is provided. The vehicle control system determines a travel locus of the vehicle within a planned route. If the vehicle tows another vehicle, or if a weight of the vehicle is heavier than a predetermined threshold value, the control system alters the travel locus of the vehicle in such a manner that a turning radius of the vehicle is increased.
    Type: Application
    Filed: April 26, 2016
    Publication date: December 1, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji KUWAHARA, Kazumi HOSHIYA, Norimi ASAHARA, Yoshio ITO, Takahito ENDO, Tadashi FUJIYOSHI
  • Publication number: 20160347314
    Abstract: A vehicle control system configured to suppress engine noise in an autonomous mode is provided. An operating mode of the vehicle can be switched between a manual mode in which a driving force and a braking force of the vehicle are controlled by a manual operation and an autonomous mode in which the driving force and the braking force of the vehicle are controlled autonomously. The vehicle control system is configured to shift an upshifting point for reducing a speed ratio of a transmission to a low speed side in the autonomous mode, in comparison with the upshifting point set in the manual mode.
    Type: Application
    Filed: May 27, 2016
    Publication date: December 1, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji KUWAHARA, Kazumi HOSHIYA, Norimi ASAHARA, Yoshio ITO, Takahito ENDO, Tadashi FUJIYOSHI
  • Patent number: 9506558
    Abstract: A vehicle control system to prevent a vehicle stopped in the autonomous mode from being started undesirably is provided. The vehicle control system is configured to select an operating mode from an autonomous mode and a manual mode, and to select a drive range from a drivable range and a non-drivable range. A controller is configured to detect a fact that a door is opened, that a door lock is unlocked, or that a seatbelt is unfastened. If at least any of those facts is detected, the controller shifts the drive range to the non-drivable range or shifts the operating mode to the manual mode.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: November 29, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi Fujiyoshi, Kazumi Hoshiya, Yoshio Ito, Norimi Asahara, Seiji Kuwahara, Takahito Endo, Kazuya Arakawa
  • Publication number: 20160339915
    Abstract: A vehicle control system configured to adjust a vehicle behavior to the behavior expected by the driver in autonomous mode is provided. The vehicle control system determines target values of the driving force, the braking force, and the steering angle based on manual operations of an accelerator, a brake and the steering device in the autonomous mode. A controller corrects a control parameter including a vehicle speed, a distance from a forerunning vehicle, an acceleration and a travelling locus based on the manual operation executed in the autonomous mode.
    Type: Application
    Filed: April 26, 2016
    Publication date: November 24, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji KUWAHARA, Kazumi HOSHIYA, Norimi ASAHARA, Yoshio ITO, Takahito ENDO, Tadashi FUJIYOSHi
  • Publication number: 20160318514
    Abstract: A vehicle control system to reduce shocks under an autonomous mode is provided. The vehicle control system is configured to select an operating mode of a vehicle from a manual mode in which a driving force and a braking force are controlled manually by a driver, and an autonomous mode in which the driving force and the braking force are controlled autonomously. A controller is configured to execute a fuel cut-off control, and a threshold selected under the autonomous mode is set in such a manner as to terminate the fuel cut-off control earlier than under the manual mode.
    Type: Application
    Filed: April 6, 2016
    Publication date: November 3, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji KUWAHARA, Kazumi HOSHIYA, Norimi ASAHARA, Yoshio ITO, Takahito ENDO, Tadashi FUJIYOSHI
  • Publication number: 20160312885
    Abstract: The present disclosure relates to a control apparatus for a vehicle. The vehicle includes an engine, and a transmission that is coupled to the engine. The control apparatus includes an electronic control unit (ECU). The ECU is configured to change a speed ratio of the transmission without an operation by a driver when an automatic operation mode is selected, and change the speed ratio of the transmission as a result of an operation by the driver when a manual operation mode is selected. The automatic operation mode and the manual operation mode are selected by the driver. The ECU executes shifting limit control based on selection of the automatic operation mode. The shifting limit control is control for reducing a shock resulting from the changing of the speed ratio of the transmission.
    Type: Application
    Filed: April 22, 2016
    Publication date: October 27, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Seiji KUWAHARA, Kazumi HOSHIYA, Norimi ASAHARA, Yoshio ITO, Takahito ENDO, Tadashi FUJIYOSHI