Patents by Inventor Tooru Matsubara

Tooru Matsubara 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: 20220347732
    Abstract: A coil skid on which a hot-rolled coil 1 obtained by coiling a hot-rolled steel sheet is placed includes: at least two or more layers of a metal plate 11 and at least two or more layers of a heat insulating material 12 each stacked alternately, in which the metal plate 11 is in contact with the hot-rolled coil 1. The uneven cooling of an outer peripheral portion of the hot-rolled coil caused by the coil skid is prevented while ensuring the strength of the coil skid, to thereby inhibit the uneven hardness in the longitudinal direction of the hot-rolled coil resulting from this uneven cooling.
    Type: Application
    Filed: October 2, 2020
    Publication date: November 3, 2022
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Takayuki OTSUKA, Tooru AKASHI, Kazuki SHIOKAWA, Yuki TAKEUCHI, Hiroki MATSUBARA
  • Patent number: 11479234
    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: Grant
    Filed: June 10, 2020
    Date of Patent: October 25, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yasuhiro Hiasa, Yasutaka Tsuchida
  • Patent number: 11479235
    Abstract: When a speed difference between a maximum rotation speed and an engine rotation speed, that is, an actual rotation speed difference, is equal to or less than a margin rotation speed difference, an engine operating point is changed such that the actual rotation speed difference becomes greater than the margin rotation speed difference. Accordingly, the speed difference between the maximum rotation speed and the engine rotation speed is prevented from becoming equal to or less than the margin rotation speed difference. As a result, since a relatively sufficient margin is secured in the difference between the maximum rotation speed and the engine rotation speed, it is possible to prevent the engine rotation speed from falling into a high-rotation state in which the engine rotation speed exceeds the maximum rotation speed.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: October 25, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Takahiro Kimura
  • Patent number: 11447110
    Abstract: When braking of the electric vehicle is performed, the braking is controlled based on a target braking split ratio which is a target value of the ratio of the braking force that is applied to the rear wheels to a total braking force that is applied to the front and rear wheels. In this case, an initial value of the target braking split ratio is set to a value within an allowable range about a transmission split ratio when braking of the electric vehicle is started while the electric vehicle is being braked by the motor, the transmission split ratio being the ratio of a braking force that is transmitted from a drive shaft to the rear wheels via a driving force split device to a total braking force that is transmitted from the drive shaft to the front and rear wheels via the driving force split device.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: September 20, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yuuki Makino
  • Patent number: 11441670
    Abstract: Because an EOP starts operating from when a decrease in discharge flow rate of an MOP is predicted or detected, a PL actual pressure that should be obtained with a PL command pressure set to a value for a required transmission torque is more easily maintained even when the discharge flow rate of the MOP becomes insufficient. After a lapse of a predetermined period of time from the start of operation of the EOP, the PL command pressure is temporarily set to a value higher than the value for the required transmission torque, and a regulator valve is controlled to operate to close a drain port. Therefore, the operation of the EOP in a high PL actual pressure is reduced, and a delay in response of a pressure regulating operation of the regulator valve in the process of reduction of the discharge flow rate of the MOP is reduced.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: September 13, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Yuki Makino, Toshiaki Tamachi, Koji Hayashi, Tooru Matsubara, Ken Fujimoto, Masato Nakano
  • Patent number: 11440531
    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: Grant
    Filed: June 10, 2020
    Date of Patent: September 13, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yasuhiro Hiasa, Yasutaka Tsuchida
  • Patent number: 11433874
    Abstract: When a speed difference between a maximum rotation speed and an engine rotation speed, that is, an actual rotation speed difference, is equal to or less than a margin rotation speed difference, an engine operating point is changed such that the actual rotation speed difference becomes greater than the margin rotation speed difference. Accordingly, the speed difference between the maximum rotation speed and the engine rotation speed is prevented from becoming equal to or less than the margin rotation speed difference. As a result, since a relatively sufficient margin is secured in the difference between the maximum rotation speed and the engine rotation speed, it is possible to prevent the engine rotation speed from falling into a high-rotation state in which the engine rotation speed exceeds the maximum rotation speed.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: September 6, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Takahiro Kimura
  • Patent number: 11420610
    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: Grant
    Filed: August 5, 2020
    Date of Patent: August 23, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yuuki Makino, Keisuke Omuro
  • Patent number: 11402856
    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: Grant
    Filed: May 27, 2020
    Date of Patent: August 2, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasuhiro Hiasa, Atsushi Tabata, Koichi Okuda, Tooru Matsubara
  • Patent number: 11383693
    Abstract: A hybrid vehicle with an engine and a rotary machine each coupled to a drive wheel in a power transmittable manner, comprises: an electronic control device that makes the rotary machine output a starting-time compensation torque to compensate a drop in a drive torque caused in a starting process of the engine in addition to a running torque when the engine is started while the vehicle is in a running state in which the drive torque is generated by the rotary machine and the engine is in a stopped state. The electronic control device starts the engine such that a starting-time inertia torque that is generated according to starting of the engine and causes the drop in the drive torque is made smaller when a torque margin of the rotary machine which is applied to the starting-time compensation torque is relatively small than when the torque margin is relatively large.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: July 12, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Kitahata, Tooru Matsubara, Kazuyuki Shiiba, Koichi Okuda, Atsushi Tabata
  • Patent number: 11377091
    Abstract: In a vehicle condition in which an engine rotation speed is likely to exceed a maximum rotation speed, since supercharging by a supercharger is curbed, it is possible to curb an increase in an engine torque. Even when the engine rotation speed exceeds the maximum rotation speed, the engine rotation speed is made less likely to increase by control of decreasing the engine torque. In a vehicle condition in which the engine rotation speed is less likely to exceed the maximum rotation speed, since a supercharging pressure becomes relatively high, it becomes easier to secure power performance. Accordingly, it is possible to curb a decrease in power performance due to curbing of supercharging and to prevent an engine from falling into a high-rotation state in which the engine rotation speed exceeds the maximum rotation speed.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: July 5, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tooru Matsubara, Atsushi Tabata, Koichi Okuda, Yasutaka Tsuchida, Keisuke Omuro, Tetsuya Kono
  • Patent number: 11377087
    Abstract: Since a supercharging pressure from a supercharger decreases when an actual rotation speed difference is equal to or less than a margin rotation speed difference, a response delay of an engine torque due to a response delay of the supercharging pressure in a high rotation curbing control unit can be appropriately curbed. A shortage of the engine torque with respect to a required engine torque due to a decrease in the supercharging pressure by a supercharging pressure decreasing unit is compensated for using an torque of a second rotary machine. Accordingly, it is possible to curb a decrease in power performance due to a decrease in the supercharging pressure and to prevent an engine rotation speed from falling into a high-rotation state in which the engine rotation speed exceeds a maximum rotation speed.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: July 5, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Takahiro Kimura
  • Patent number: 11370410
    Abstract: When a travel mode in which an engine is not used as a drive power source for travel is switched to a travel mode in which the engine is used as a drive power source for travel in response to an acceleration request from a driver, it is determined whether an assist torque which is able to be output from a second rotary machine is sufficient for a required assist torque for compensating for an output shortage of the engine due to a supercharging response delay in a supercharger. When it is determined that the assist torque is not sufficient for the required assist torque, an engine rotation speed is increased to a predetermined target rotation speed by an MG1 torque of a first rotary machine.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: June 28, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yasutaka Tsuchida
  • Patent number: 11352943
    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: Grant
    Filed: June 30, 2020
    Date of Patent: June 7, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Takahiro Kimura, Yasutaka Tsuchida
  • Patent number: 11338790
    Abstract: Since a maximum rotation speed is set to a lower value when a supercharging pressure from a supercharger is high than when the supercharging pressure is low, an engine torque is decreased at a relatively low engine rotation speed and the engine rotation speed is less likely to fall into a high-rotation state. Since the maximum rotation speed is set to a relatively high value when the supercharging pressure is relatively low and the engine rotation speed is less likely to fall into a high-rotation state, the engine torque is not decreased at a relatively high engine rotation speed and power performance can be easily secured. Accordingly, it is possible to curb a decrease in power performance due to a decrease in the engine torque and to prevent the engine rotation speed from falling into a high-rotation state.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: May 24, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Takashi Kohno, Yasutaka Tsuchida
  • Patent number: 11333063
    Abstract: When it is determined that there is a likelihood of occurrence of an abnormality in a supercharger, a maximum engine rotation speed and a maximum MG2 rotation speed are changed to a low rotation speed side and operating points of an engine and a rotary machine are controlled such that an engine rotation speed and an MG2 rotation speed are respectively within ranges which do not exceed the changed maximum rotation speeds. Accordingly, even when the supercharger does not operate normally and an abnormal increase in a supercharging pressure occurs, it is possible to curb a high-rotation state of the engine rotation speed and the MG2 rotation speed. As a result, even when an abnormal increase in the supercharging pressure occurs, it is possible to curb a decrease in durability of components.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: May 17, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yasutaka Tsuchida
  • Patent number: 11325584
    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: Grant
    Filed: July 10, 2020
    Date of Patent: May 10, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yasuhiro Hiasa, Yasutaka Tsuchida
  • Publication number: 20220118967
    Abstract: While a vehicle is traveling in an automatic driving mode, an auto-driving oil pressure changing unit makes the engagement pressure of hydraulic oil supplied to a release-side engagement device to be released during a downshift of a stepwise shifting unit, higher than the engagement pressure set during traveling in a manual driving mode, so that retraction of the acceleration due to a drop of drive torque during the downshift is reduced. At this time, an auto-driving rotating machine controller makes drive-side MG2 torque generated from a second rotating machine, larger than that generated during traveling in the manual driving mode, so as to speed up the progress of the downshift, and prevent retraction of the acceleration from being prolonged.
    Type: Application
    Filed: October 7, 2021
    Publication date: April 21, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinichi SASADE, Tooru MATSUBARA, Hiromasa TATSUSHIRO, Daisuke SUYAMA, Tomoyasu KIMURA
  • Patent number: 11305781
    Abstract: A vehicle control device stores learning data to correct a parameter used in a control program for controlling a vehicle, determines whether or not a part controlled by the parameter has been replaced; and resets the learning data when determining that the part has been replaced. The vehicle control device determines whether or not the part has been replaced by identifying individuality of the part based on characteristics of a sensor output from a sensor provided in the part.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: April 19, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Hiromasa Tatsushiro, Kota Fujii
  • Publication number: 20220111845
    Abstract: A control device for a vehicle includes an electronic control unit configured to: execute driving assistance control for driving the vehicle at least by automatically controlling a speed irrespective of a driving operation of a driver; execute regenerative braking using a rotator at a time of deceleration during travel under the driving assistance control, and to restrict downshift of an automatic transmission when a demanded deceleration amount for the vehicle is equal to or lower than a predetermined deceleration amount; and execute the regenerative braking using the rotator at the time of deceleration during the travel under the driving assistance control, and not to restrict the downshift when the demanded deceleration amount is higher than the predetermined deceleration amount.
    Type: Application
    Filed: October 4, 2021
    Publication date: April 14, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi KOHNO, Yasuhiro HIASA, Yasutaka TSUCHIDA, Tooru MATSUBARA