Patents by Inventor Yu Nakao

Yu Nakao 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: 11535121
    Abstract: An ECU switches a control mode to an HV mode when an SOC decreases to a lower limit during an EV mode. The ECU calculates an evaluation value ?D of high-rate deterioration indicating a deterioration component of a secondary battery due to non-uniformity in salt concentration in a battery. The ECU executes high-rate deterioration inhibiting control when the HV mode is currently selected and when the battery is evaluated as deteriorating based on the evaluation value ?D, the high-rate deterioration inhibiting control being control for increasing the SOC by making a control target of the SOC higher than the lower limit of the SOC. On the other hand, the ECU does not execute the high-rate deterioration inhibiting control when the EV mode is currently selected.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: December 27, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koji Hokoi, Yu Nakao, Yoshimitsu Takahashi, Yoshihiro Uchida, Kazuki Furuta, Kazuto Roppongi
  • Patent number: 11015542
    Abstract: A plug-in hybrid vehicle of the present disclosure includes an internal combustion engine, a particulate filter configured to collect particulate matter in exhaust gas of the internal combustion engine, an electric motor that outputs a driving force and a regenerative braking force to a wheel, a power storage device that exchanges electric power with the electric motor and is chargeable with electric power from an external power supply, and a controller programmed to decrease a target SOC for charging the power storage device with the electric power from the external power supply when a deposition amount of the particulate matter in the particulate filter is more than a predetermined value, compared to when the deposition amount of the particulate matter in the particulate filter is equal to or less than the predetermined value.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: May 25, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuma Aoki, Koji Hokoi, Yu Nakao, Kohichiroh Yonemura, Yusuke Furuhashi
  • Patent number: 11007897
    Abstract: A hybrid vehicle includes an engine, a motor generator, a battery, and an ECU (Electronic Control Unit). The ECU is configured to calculate an evaluation value indicating a degree of progress of deterioration of the battery, the deterioration being caused by an imbalance in a salt concentration in the battery, and is configured to execute a high-rate deterioration suppressing control that raises a target SOC (State of Charge) of the battery when the battery is evaluated to be deteriorated in accordance with the evaluation value. The ECU is configured to also raise the target SOC when an actual SOC is increased due to an electric power generation by the motor generator during the execution of the high-rate deterioration suppressing control. The raised target SOC is lower than the increased actual SOC.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: May 18, 2021
    Assignees: Toyota Jidosha Kabushiki Kaisha, DENSO Ten Limited
    Inventors: Yu Nakao, Koji Hokoi, Yoshimitsu Takahashi, Yoshihiro Uchida, Kazuki Furuta, Kazuto Roppongi
  • Publication number: 20200158039
    Abstract: A plug-in hybrid vehicle of the present disclosure includes an internal combustion engine, a particulate filter configured to collect particulate matter in exhaust gas of the internal combustion engine, an electric motor that outputs a driving force and a regenerative braking force to a wheel, a power storage device that exchanges electric power with the electric motor and is chargeable with electric power from an external power supply, and a controller programmed to decrease a target SOC for charging the power storage device with the electric power from the external power supply when a deposition amount of the particulate matter in the particulate filter is more than a predetermined value, compared to when the deposition amount of the particulate matter in the particulate filter is equal to or less than the predetermined value.
    Type: Application
    Filed: November 4, 2019
    Publication date: May 21, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuma AOKI, Koji Hokoi, Yu Nakao, Kohichiroh Yonemura, Yusuke Furuhashi
  • Publication number: 20190283624
    Abstract: A vehicle includes an engine, a motor generator, a battery, and an ECU. The ECU is configured to calculate an evaluation value indicating a degree of progress of deterioration of the battery, the deterioration being caused by an imbalance in a salt concentration in the battery, and is configured to execute high-rate deterioration suppressing control that raises a target SOC of the battery when the battery is evaluated to be deteriorated in accordance with the evaluation value. The ECU is configured to also raise the target SOC when an actual SOC is increased due to the electric power generation by the motor generator during the execution of the high-rate deterioration suppressing control. The raised target SOC is lower than the increased actual SOC.
    Type: Application
    Filed: March 12, 2019
    Publication date: September 19, 2019
    Inventors: Yu Nakao, Koji Hokoi, Yoshimitsu Takahashi, Yoshihiro Uchida, Kazuki Furuta, Kazuto Roppongi
  • Publication number: 20190232815
    Abstract: An ECU switches a control mode to an HV mode when an SOC decreases to a lower limit during an EV mode. The ECU calculates an evaluation value ?D of high-rate deterioration indicating a deterioration component of a secondary battery due to non-uniformity in salt concentration in a battery. The ECU executes high-rate deterioration inhibiting control when the HV mode is currently selected and when the battery is evaluated as deteriorating based on the evaluation value ?D, the high-rate deterioration inhibiting control being control for increasing the SOC by making a control target of the SOC higher than the lower limit of the SOC. On the other hand, the ECU does not execute the high-rate deterioration inhibiting control when the EV mode is currently selected.
    Type: Application
    Filed: January 29, 2019
    Publication date: August 1, 2019
    Inventors: Koji Hokoi, Yu Nakao, Yoshimitsu Takahashi, Yoshihiro Uchida, Kazuki Furuta, Kazuto Roppongi
  • Patent number: 8135530
    Abstract: An ECU executes a program including the steps of: if brake hold control is currently exerted , setting at zero a controlled value of a degree of operation of an accelerator pedal used as a controlled value of a degree of a request made by a driver for acceleration, to control a force output to drive the vehicle; if an actual value of the degree of operation of the accelerator pedal serving as an actual value of the degree of the request made by the driver for acceleration is larger than a predetermined degree, determining that there is a request from the driver for acceleration; outputting a command to cancel the brake hold control; and converging the controlled value of the degree of operation of the accelerator pedal to the actual value of the degree of operation of the accelerator pedal.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: March 13, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kiyoshiro Ueoka, Yu Nakao
  • Publication number: 20100076661
    Abstract: An ECU executes a program including the steps of: if brake hold control is currently exerted, setting at zero a controlled value of a degree of operation of an accelerator pedal used as a controlled value of a degree of a request made by a driver for acceleration, to control a force output to drive the vehicle; if an actual value of the degree of operation of the accelerator pedal serving as an actual value of the degree of the request made by the driver for acceleration is larger than a predetermined degree, determining that there is a request from the driver for acceleration; outputting a command to cancel the brake hold control; and converging the controlled value of the degree of operation of the accelerator pedal to the actual value of the degree of operation of the accelerator pedal.
    Type: Application
    Filed: November 7, 2007
    Publication date: March 25, 2010
    Inventors: Kiyoshiro Ueoka, Yu Nakao
  • Publication number: 20080081311
    Abstract: For accurately setting an abutment tooth model on a measuring apparatus and easily adjusting a position of the model, a holder includes a pillar shaped abutment tooth model holding base (1), which has a concave part at the upper side, and a holding hole provided at a center of an end face of the lower side for inserting a supporting shaft projecting at a center of a rotating part of the measuring apparatus, and can detachably hold the residual ridge side of the model with an sticky material built in the concave part, and a cylindrical body (2), which has a lower side having a slightly larger inner diameter than an outer diameter of the holding base (1) and being externally fitted to the holding base (1), a stepped part, and an upper side therefrom having a smaller inner diameter than that of the lower side thereof.
    Type: Application
    Filed: September 26, 2007
    Publication date: April 3, 2008
    Applicant: GC Corporation
    Inventors: Tatsuru DOUMOTO, Tomohiko KURODA, Yu NAKAO