Patents by Inventor Atsushi Tabata

Atsushi Tabata 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: 20210061257
    Abstract: In a hybrid vehicle including an engine, a first motor, a differential unit, a second motor, a driving force split device, and a controller, the controller is configured to control the engine, the first motor, and the second motor such that the hybrid vehicle travels with the engine rotating within a range of an allowable maximum rotational speed for control or less. In this case, the controller is configured to set the allowable maximum rotational speed such that the allowable maximum rotational speed is higher when a main-side ratio is lower than when the main-side ratio is higher. The main-side ratio is a ratio of a driving force that is transmitted to main drive wheels to the total driving force that is transmitted from a drive shaft to the main drive wheels and sub drive wheels via the driving force split device.
    Type: Application
    Filed: August 31, 2020
    Publication date: March 4, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koichi OKUDA, Atsushi TABATA, Yasutaka TSUCHIDA, Yuuki MAKINO
  • Publication number: 20210039626
    Abstract: There are provided a controller and a control method for a hybrid vehicle including an engine with a supercharger serving as a drive power source for travel, a rotary machine serving as a drive power source for travel, and a power storage device configured to transmit and receive electric power to and from the rotary machine. The controller determines whether an operation of the supercharger is limited, compensates for a torque shortage of the engine due to limitation of the operation of the supercharger by a torque of the rotary machine when it is determined that the operation of the supercharger is limited, and curbs a decrease in an amount of electric power stored in the power storage device more when it is determined that the operation of the supercharger is limited than when it is determined that the operation of the supercharger is not limited.
    Type: Application
    Filed: July 30, 2020
    Publication date: February 11, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tooru MATSUBARA, Atsushi Tabata, Koichi Okuda, Yasutaka Tsuchida, Kenta Kumazaki, Tatsuya Imamura
  • Publication number: 20210039628
    Abstract: A control device for a hybrid vehicle includes: a drive control unit that calculates required drive power which is required for a hybrid vehicle based on an accelerator opening when an accelerator return operation is performed, calculates a target engine output which changes slowly with respect to a required engine output for realizing the required drive power through slow change processing, and controls an engine, a first rotary machine, and a second rotary machine such that an engine output reaches the target engine output; and a smoothing rate setting unit that changes a smoothing rate which is used for the slow change processing based on a supercharging pressure and sets the smoothing rate to a smaller value when the supercharging pressure is high than when the supercharging pressure is low.
    Type: Application
    Filed: July 10, 2020
    Publication date: February 11, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA, Yasuhiro HIASA, Yasutaka TSUCHIDA
  • Publication number: 20210039622
    Abstract: A vehicle includes driving wheels, driven wheels, a drive device connected to a drive shaft, a drive force distribution device, and an electronic control unit configured to execute a moderate change process on a required torque required for the drive shaft to set a target torque to be output to the drive shaft when the torque output to the drive shaft changes and crosses a value of zero. The electronic control unit is configured to control the drive device such that the target torque is output to the drive shaft, and set the target torque such that a change in the target torque with respect to a change in the required torque is more moderate when the driving side distribution ratio is small compared with the change in the target torque with respect to the change in the required torque when the driving side distribution ratio is large.
    Type: Application
    Filed: August 5, 2020
    Publication date: February 11, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA, Yuuki MAKINO, Keisuke OMURO
  • Publication number: 20210031747
    Abstract: When an acceleration request is issued, an electronic control unit for a hybrid vehicle performs control for producing an acceleration feeling of setting a target engine rotation speed to an initial rotation speed (=basic initial value+initial value correction value) which is lower than an optimal-fuel-efficiency rotation speed at which required engine power is able to be most efficiently output and increasing the engine rotation speed from the initial rotation speed to the optimal-fuel-efficiency rotation speed at a rotation speed increase rate (=basic increase rate+increase rate correction value) based on the elapse of time. When the target supercharging pressure is high, the initial value correction value is set to a greater value and the increase rate correction value is set to a greater value than when the target supercharging pressure is low.
    Type: Application
    Filed: July 21, 2020
    Publication date: February 4, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA, Yasuhiro HIASA, Yasutaka TSUCHIDA
  • Publication number: 20210034074
    Abstract: An electronic control unit of a vehicle includes (a) a target operating point setting unit that calculates a request driving force requested for a vehicle, and set a target engine operating point through a slow change process for obtaining an engine output that slowly changes with respect to a request engine output implementing the request driving force, (b) a smoothing factor setting unit that changes a smoothing factor used for the slow change process according to an amount of change in a turbocharging pressure in the engine and sets the smoothing factor to a smaller value when the amount of change in the turbocharging pressure is smaller than when the amount of change in the turbocharging pressure is larger, and (c) a drive controller that controls the engine and the continuously variable transmission such that the engine operating point is the target engine operating point.
    Type: Application
    Filed: May 27, 2020
    Publication date: February 4, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasuhiro HIASA, Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA
  • Publication number: 20210031745
    Abstract: An MG1 torque at a time of decreasing an engine speed of an engine is made larger when a turbocharging pressure by a turbocharger is higher than when the turbocharging pressure is lower. In this way, even if the losses of pumps of the engine differ due to the remaining turbocharging pressure during a transition of stopping the engine in turbocharging, it is possible to appropriately reduce the engine speed. Therefore, when the engine is being brought to a stop, it is possible to appropriately suppress vibration generated in the vehicle.
    Type: Application
    Filed: June 10, 2020
    Publication date: February 4, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA, Yasuhiro HIASA, Yasutaka TSUCHIDA
  • Publication number: 20210031746
    Abstract: When an engine during rotation stop is started, a target cranking speed is set to a value at which a first rotating machine MG1 is maintained in an electric power generation state when a request engine power is an output that needs a turbocharging pressure and which is higher than when the request output is not the output that needs the turbocharging pressure, and even after the engine is brought into the operating state, an MG1 cranking torque is controlled to apply a torque for increasing an engine speed of the engine to the target cranking speed to the engine. In this way, it is possible to increase the engine speed after an autonomous operation more quickly while suppressing power consumption of the first rotating machine MG1.
    Type: Application
    Filed: July 9, 2020
    Publication date: February 4, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA, Yasuhiro HIASA, Yasutaka TSUCHIDA
  • Patent number: 10906524
    Abstract: A control apparatus for a vehicular power transmitting system includes a power transmission switching portion configured to selectively establish a first drive mode by placing one of the first and second coupling elements in an engaged state, a second drive mode by placing the other of the first and second coupling elements in an engaged state, or a third drive mode by placing both of the first and second coupling elements in the engaged states. The power transmission switching portion switches the vehicular power transmitting system between the first and second drive modes through the third drive mode, where a predetermined condition is not satisfied, and switches the vehicular power transmitting system between the first and second drive modes with concurrent engaging and releasing actions of the first and second coupling elements, where the predetermined condition is satisfied.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: February 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masafumi Yamamoto, Atsushi Tabata, Tatsuya Imamura, Koichi Okuda, Kota Fujii
  • Publication number: 20210025346
    Abstract: A controller and a control method for a vehicle including an engine with a supercharger and an automatic transmission provided in a power transmission path between the engine and driving wheels are provided. The controller is configured to perform learning control of learning a command value associated with gear shifting of the automatic transmission. The controller is configured to limit a supercharging pressure of the supercharger when the automatic transmission is performing gear shifting to be equal to or less than a predetermined pressure until initial learning which is performed by the learning control unit in a predetermined period after the vehicle has been manufactured is completed.
    Type: Application
    Filed: July 21, 2020
    Publication date: January 28, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA, Hiromasa TATSUSHIRO, Kenta KUMAZAKI
  • Patent number: 10894538
    Abstract: A control apparatus for a hybrid vehicle that includes an engine serving as a drive force source, an electric motor serving as a drive force source, drive wheels, a storage battery for supplying and receiving an electric power to and from the electric motor, a transmission mechanism for transmitting a drive force supplied from each of the drive force sources toward the drive wheels. During running of the hybrid vehicle by a drive force of the electric motor with the engine being stopped, the control apparatus is configured to determine whether the engine is to be started. When determining that the engine is to be started during the running of the hybrid vehicle, the control apparatus is configured to cause a gear ratio of the transmission mechanism to be changed and to cause the engine to be started after the gear ratio of the transmission mechanism has been changed.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: January 19, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Kitahata, Tooru Matsubara, Kazuyuki Shiiba, Koichi Okuda, Atsushi Tabata
  • Publication number: 20210010410
    Abstract: A rotation adjusting device is controlled such that an engine speed rising rate at the time of acceleration request is made smaller when a turbocharging pressure is lower than the turbocharging pressure is higher. Therefore, an engine speed can be increased at such a low speed that a rising delay in the turbocharging pressure hardly occurs, in a low turbocharging pressure region. Further, when the rotation adjusting device is controlled such that the engine speed rising rate at the time of the acceleration request is set to a value corresponding to the turbocharging pressure, an MG2 torque is controlled to compensate for an insufficient drive torque of an actual engine torque for a request engine torque. Therefore, even when the engine torque is increased slowly by increasing the engine speed at a slow speed, the insufficient drive torque is compensated for by the MG2 torque.
    Type: Application
    Filed: June 30, 2020
    Publication date: January 14, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA, Takahiro KIMURA, Yasutaka TSUCHIDA
  • Patent number: 10851889
    Abstract: While automatic driving control is being performed, traveling in a driving state of a vehicle corresponding to an unconverged region (including an unperformed region and a performed region) is preferentially selected between the traveling in the driving state of the vehicle corresponding to the unconverged region, and traveling in the driving state of the vehicle corresponding to a converged region. As such, learning control that corrects an amount of operation associated with control of the vehicle is performed more easily throughout the entire learning regions regardless of a usage state of the vehicle by a driver. Therefore, it is possible to achieve an appropriate traveling state at an early stage by the learning control that corrects the amount of operation associated with control of the vehicle.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: December 1, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Atsushi Tabata, Tetsuya Kono, Koichi Okuda
  • Patent number: 10836373
    Abstract: A control system for hybrid vehicles configured to improve energy efficiency by controlling a speed difference in a coupling. The hybrid vehicle comprises: a power split mechanism; an engine connected to a first rotary element; a first motor connected to the second rotary element; a second motor connected to the third rotary element; drive wheels to which a torque is delivered from the third rotary element; and a coupling comprising a drive member and a driven member. A controller is configured to change the speed difference in the coupling, and to change a speed or a torque of at least one of the first motor and the second motor after changing the speed difference in the coupling.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: November 17, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Atsushi Tabata
  • Publication number: 20200324984
    Abstract: There is provided a loading support system including a container selection unit configured to select a container, which is suitable for a shape of a load to be loaded on a cargo bed of a collection and delivery vehicle, from a plurality of standardized containers having different shapes, and a loading location determination unit configured to determine a loading location of the container, which is selected by the container selection unit, in the cargo bed.
    Type: Application
    Filed: April 7, 2020
    Publication date: October 15, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei OHTSUKA, Atsushi SAJIKI, Yukio UMEMURA, Takashi NANBU, Hiroki TABATA, Hiroki HAGIWARA, Takeshi SAOTOME
  • Publication number: 20200327493
    Abstract: A cargo handling place reservation system includes a reception unit configured to receive a reservation application from a user; and a reservation unit configured to reserve a reservation target candidate place as the cargo handling place for the reservation target transportation vehicle. The reservation unit is configured to extract vacant candidate places, which are the candidate places where other reservations are not set in an allocated time slot from the expected arrival time of the reservation target transportation vehicle at the candidate place until a use time allocated to the reservation target transportation vehicle elapses, by referring to a vehicle information storage unit and a candidate place information storage unit, to determine the reservation target candidate place from the extracted vacant candidate places, and to set the reservation in the allocated time slot as the reservation status of the reservation target candidate place in the candidate place information.
    Type: Application
    Filed: April 8, 2020
    Publication date: October 15, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroki TABATA, Atsushi SAJIKI, Yukio UMEMURA, Takashi NANBU, Kohei OHTSUKA, Hiroki HAGIWARA, Takeshi SAOTOME, Masao HITOMI, Yu NISHIKATA, Kousuke MATSUYAMA, Maiko EGUCHI, Seiji KUROKI, Hiroaki KAWAHARA
  • Publication number: 20200327496
    Abstract: A delivery management system includes: an acceptance unit configured to accept a delivery request including information on a delivery date of a package, from a user, a setting unit configured to set a delivery fee, in which a discount according to the delivery date is applied, for the delivery request; a delivery schedule storage unit configured to store a delivery schedule of each of a plurality of delivery vehicles; and a determination unit configured to determine a delivery vehicle that delivers the package corresponding to the delivery request based on the delivery schedule such that a requirement of the delivery date of the delivery request is satisfied.
    Type: Application
    Filed: April 8, 2020
    Publication date: October 15, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei OHTSUKA, Atsushi SAJIKI, Yukio UMEMURA, Takashi NANBU, Hiroki TABATA, Hiroki HAGIWARA, Takeshi SAOTOME, Masao HITOMI, Yu NISHIKATA, Kousuke MATSUYAMA, Maiko EGUCHI, Seiji KUROKI, Hiroaki KAWAHARA
  • Publication number: 20200327484
    Abstract: A sharing system includes a management apparatus connected to a plurality of user terminals, a storage facility terminal provided in a storage facility, and a plurality of relay facility terminals respectively provided in a plurality of relay facilities through a network. The management apparatus includes a usage processing unit configured to perform usage processing of an article. When the usage processing unit receives a usage request, which is transmitted from the user terminal and which includes a usage user and a usage article, the usage processing unit transmits, to the storage facility terminal, a transport instruction to transport the usage article to the relay facility corresponding to the usage user, as the usage processing.
    Type: Application
    Filed: April 7, 2020
    Publication date: October 15, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kohei OHTSUKA, Atsushi SAJIKI, Yukio UMEMURA, Takashi NANBU, Hiroki TABATA, Hiroki HAGIWARA, Takeshi SAOTOME
  • Publication number: 20200256460
    Abstract: A control device for a vehicle includes an electronic control unit configured to perform an automatic driving control, to determine whether there is a possibility that a start control of an engine and a gear shift control of an automatic transmission are concurrently executed in a future traveling under the automatic driving control, during execution of the automatic driving control, and to first execute one control of the start control of the engine and the gear shift control of the automatic transmission in the future traveling and execute the other control after the one control finishes, when the electronic control unit determines that there is the possibility that the start control of the engine and the gear shift control of the automatic transmission are concurrently executed in the future traveling under the automatic driving control.
    Type: Application
    Filed: December 30, 2019
    Publication date: August 13, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shuma NAITO, Atsushi TABATA, Tetsuya KONO, Kouichi OKUDA, Kota FUJII
  • Publication number: 20200208736
    Abstract: While automatic driving control is being performed, traveling in a driving state of a vehicle corresponding to an unconverged region (including an unperformed region and a performed region) is preferentially selected between the traveling in the driving state of the vehicle corresponding to the unconverged region, and traveling in the driving state of the vehicle corresponding to a converged region. As such, learning control that corrects an amount of operation associated with control of the vehicle is performed more easily throughout the entire learning regions regardless of a usage state of the vehicle by a driver. Therefore, it is possible to achieve an appropriate traveling state at an early stage by the learning control that corrects the amount of operation associated with control of the vehicle.
    Type: Application
    Filed: November 4, 2019
    Publication date: July 2, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Atsushi Tabata, Tetsuya Kono, Koichi Okuda