Patents by Inventor Yasuhiro Hiasa

Yasuhiro Hiasa 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: 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: 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: 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: 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: 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
  • Patent number: 11279338
    Abstract: A control device for a hybrid vehicle includes an engine operating point control unit that shifts an engine operating point to an engine operating point on an optimal fuel-efficiency operating line outside a predetermined noise generation region in which combustion sounds of an engine become noise when the engine operating point is in the noise generation region. Accordingly, when the engine operating point is in the noise generation region, the engine operating point control unit shifts the engine operating point to an engine operating point on the optimal fuel-efficiency operating line outside the noise generation region. As a result, since the engine operating point is not separated from the optimal fuel-efficiency operating line even when the engine operating point departs from the noise generation region, it is possible to curb a decrease in fuel efficiency.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: March 22, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tooru Matsubara, Atsushi Tabata, Koichi Okuda, Yasuhiro Hiasa, Takashi Kohno
  • Publication number: 20210300318
    Abstract: The present disclosure relates to a control device for a vehicle. The vehicle includes an engine as a drive source, a motor generator as a drive source, a battery for storing electric power generated by the motor generator using an output of the engine, and an exhaust treatment device provided in an exhaust passage of the engine. The control device is configured to execute a temperature rise control that increases the output of the engine and raises a temperature of exhaust gas flowing into the exhaust treatment device.
    Type: Application
    Filed: February 3, 2021
    Publication date: September 30, 2021
    Inventors: Yasuhiro HIASA, Yasutaka TSUCHIDA
  • Publication number: 20210107445
    Abstract: A control device for a hybrid vehicle includes an engine operating point control unit that shifts an engine operating point to an engine operating point on an optimal fuel-efficiency operating line outside a predetermined noise generation region in which combustion sounds of an engine become noise when the engine operating point is in the noise generation region. Accordingly, when the engine operating point is in the noise generation region, the engine operating point control unit shifts the engine operating point to an engine operating point on the optimal fuel-efficiency operating line outside the noise generation region. As a result, since the engine operating point is not separated from the optimal fuel-efficiency operating line even when the engine operating point departs from the noise generation region, it is possible to curb a decrease in fuel efficiency.
    Type: Application
    Filed: September 10, 2020
    Publication date: April 15, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tooru MATSUBARA, Atsushi TABATA, Koichi OKUDA, Yasuhiro HIASA, Takashi KOHNO
  • Publication number: 20210086751
    Abstract: Since a maximum rotation speed of a second rotary machine is set to a lower value when a supercharging pressure is high than when the supercharging pressure is low, an engine torque decreases with an rotation speed of the second rotary machine which is relatively low and the rotation speed is less likely to fall into a high-rotation state. When the supercharging pressure is relatively low and the rotation speed is less likely to reach an upper-limit rotation speed of the second rotary machine, the maximum rotation speed is set to a relatively high value. Accordingly, the engine torque does not decrease to the rotation speed which is relatively high and power performance can be easily secured. As a result, it is possible to prevent a decrease in power performance due to the decrease in the engine torque and to prevent the rotation speed from falling into a high-rotation state.
    Type: Application
    Filed: July 9, 2020
    Publication date: March 25, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yasuhiro Hiasa, Yasutaka Tsuchida
  • Publication number: 20210061252
    Abstract: When a first type gear shift line is used as a gear shift line to change the gear ratio, and a predetermined condition including a condition that a state of charge of the power storage device is equal to or lower than a first ratio is satisfied, the control device changes the gear shift line to a second type gear shift line that recommends a lower speed gear ratio than the first type gear shift line.
    Type: Application
    Filed: August 12, 2020
    Publication date: March 4, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasuhiro HIASA, Takahiro KIMURA, Yasutaka TSUCHIDA, Shinichi SASADE
  • Publication number: 20210061251
    Abstract: In a hybrid vehicle, when a required driving force is equal to or smaller than a first upper limit driving force, a control device sets a target driving force to the required driving force. When the required driving force is larger than the first upper limit driving force, the control device sets a target compensation power of a power storage device, based on a difference between the required driving force and the first upper limit driving force. The control device sets a second upper limit driving force of a driveshaft when an upper limit power is output from an engine and the power storage device is charged or discharged with a power based on the target compensation power. The control device sets a target driving force to the smaller between the required driving force and the second upper limit driving force. This configuration suppresses deterioration of the driver's drive feeling.
    Type: Application
    Filed: August 12, 2020
    Publication date: March 4, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro KIMURA, Yasuhiro HIASA, Yasutaka TSUCHIDA
  • 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: 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
  • 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
  • Patent number: 10794482
    Abstract: A shifting control apparatus includes an overall-speed-position shifting control portion including: a synchronous shifting control portion to implement a synchronous control of shifting actions of the vehicular automatic transmission and the step-variable transmission portion to respective target ones of the overall speed positions and the gear positions, such that a moment of generation of a command to establish the target overall speed position is delayed with respect to a moment of generation of a command to establish the target gear position, so that the shifting actions take place in synchronization with each other, irrespective of different control response times of the shifting actions; and a multiple-step shifting control portion to command the synchronous shifting control portion such that the vehicular automatic transmission performs a shift-up action from a present one of the overall speed position to the target overall speed position through at least one intermediate overall speed position interme
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: October 6, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasuhiro Hiasa, Ichiro Isobe, Tooru Matsubara, Kazuyuki Shiiba
  • Publication number: 20190063603
    Abstract: A shifting control apparatus includes an overall-speed-position shifting control portion including: a synchronous shifting control portion to implement a synchronous control of shifting actions of the vehicular automatic transmission and the step-variable transmission portion to respective target ones of the overall speed positions and the gear positions, such that a moment of generation of a command to establish the target overall speed position is delayed with respect to a moment of generation of a command to establish the target gear position, so that the shifting actions take place in synchronization with each other, irrespective of different control response times of the shifting actions; and a multiple-step shifting control portion to command the synchronous shifting control portion such that the vehicular automatic transmission performs a shift-up action from a present one of the overall speed position to the target overall speed position through at least one intermediate overall speed position interme
    Type: Application
    Filed: August 17, 2018
    Publication date: February 28, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasuhiro HIASA, Ichiro ISOBE, Tooru MATSUBARA, Kazuyuki SHIIBA
  • Patent number: 10155509
    Abstract: An engine, a transmission unit which is connected to the engine and is shifted by an engagement apparatus, and a differential unit which connects the transmission unit and a drive wheel are included. The differential unit includes a first rotary element connected to an output element of the transmission unit, a second rotary element connected to a first rotary machine, and a third rotary element connected to the drive wheel. When an output from the first rotary machine is limited, the engagement apparatus is slipped and an operation point of the engine is changed. The change of the operation point can cause an increase in torque of the engine.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: December 18, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Tooru Matsubara, Kenta Kumazaki, Yasuhiro Hiasa, Tatsuya Imamura, Takeshi Kitahata
  • Patent number: 10112601
    Abstract: A driving device for a hybrid vehicle includes a transmission unit configured to output a rotation of an engine while changing rotating speed of the engine; and a first rotating electric machine. The first rotating electric machine is configured to supply a torque for increasing the rotating speed of the engine at the time of starting up of the engine to the engine through the transmission unit. At the time of starting up of the engine, the gear shift stage of the transmission unit is switched to an overdrive state. Thus, a torque sufficient for starting up of the engine can be supplied to the engine, and hence the engine can be appropriately started up.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: October 30, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Atsushi Tabata, Tooru Matsubara, Kenta Kumazaki, Yasuhiro Hiasa, Tsuyoshi Kitahata