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: 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
  • Patent number: 10066718
    Abstract: A control apparatus for a dynamic power transmission apparatus is provided. The dynamic power transmission apparatus includes a differential mechanism, an electric generator, an electric motor, and a fluid coupling. The electric motor is disposed at a position apart from a transmission path along which a dynamic power of an engine is transmitted to a driving wheel. The fluid coupling is disposed between the electric motor and the transmission path. The control apparatus includes an electronic controller configured to restrict a charge of an electric storage apparatus with an electric power generated by the electric generator, depending on a state of the electric storage apparatus, and control the fluid coupling to differentially rotate and to drive the electric motor by the electric power such that a dynamic power loss is generated in the fluid coupling, when restricting the charge of the electric storage apparatus.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: September 4, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yasuhiro Hiasa, Keita Imai, Takeshi Kitahata
  • Patent number: 10023171
    Abstract: A power transmission device includes: an engine; a rotary machine; and an oil pump connected to each of a rotary shaft of the engine and a rotary shaft of the rotary machine through a one-way clutch. The power transmission device is configured to allow the rotary machine to rotate at a rotational speed higher than the rotational speed corresponding to a speed of the engine and lower than the rotational speed corresponding to an idling speed of the engine at the time of startup of the engine.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: July 17, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koichi Okuda, Atsushi Tabata, Tooru Matsubara, Kenta Kumazaki, Yasuhiro Hiasa, Takeshi Kitahata, Tatsuya Imamura, Masafumi Yamamoto, Keita Imai, Keisuke Oomuro
  • Patent number: 9944275
    Abstract: A control device of a hybrid vehicle includes an electric motor outputting a running torque at the time of motor running and a starting torque at engine start, in a state of the motor running using even the starting torque, the control device being configured to give a notification of the state to a driver when a charging capacity is smaller than a first predetermined value, and to start an engine when the charging capacity is smaller than a second predetermined value which is smaller than the first predetermined value.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: April 17, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Tooru Matsubara, Koichi Okuda, Kenta Kumazaki, Tatsuya Imamura, Keita Imai, Takeshi Kitahata, Shunya Kato, Yasuhiro Hiasa
  • Patent number: 9771065
    Abstract: A vehicle control system for reducing shocks resulting from restarting an engine under EV running mode. The vehicle control system is applied to a vehicle including an engagement device that selectively connect the engine with the powertrain, and a motor adapted to generate a drive force and connected with the powertrain. In the vehicle, a first mode is selected to propel the vehicle by the motor while interrupting the torque transmission between the engine and the powertrain and stopping the engine, and a second mode is selected to propel the vehicle by the motor while allowing the torque transmission between the engine and the powertrain and stopping the engine. The vehicle control system selects the second mode if a control response of at least any of the engagement device and the motor is estimated to be out of a predetermine range when the vehicle is running while stopping the engine.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: September 26, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Atsushi Tabata, Toshiki Kanada, Tooru Matsubara, Yasuhiro Hiasa
  • Patent number: 9677655
    Abstract: A hybrid vehicle driving device includes: a first differential mechanism connected to an engine and transmitting a rotation of the engine; a second differential mechanism connecting the first differential mechanism and a drive wheel; engagement devices changing a speed of the first differential mechanism; and a valve arranged in a hydraulic circuit and regulating the engagement devices from simultaneously engaging. The second differential mechanism includes a first rotation element connected to an output element of the first differential mechanism, a second rotation element connected to a first rotating machine, and a third rotation element connected to a second rotating machine and the drive wheel. The valve regulates the engagement devices from simultaneously engaging at a time of traveling with the engine, and tolerates the engagement devices from simultaneously engaging at a time of traveling with the first rotating machine and the second rotating machine.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: June 13, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tooru Matsubara, Kenta Kumazaki, Tatsuya Imamura, Takeshi Kitahata, Yasuhiro Hiasa, Atsushi Tabata
  • Patent number: 9649926
    Abstract: A power transmission device for a hybrid vehicle includes: a transmission device that includes a carrier to which an engine rotation shaft is connected; a differential device that includes a plurality of rotation components individually connected to a drive wheel, an MG2 rotation shaft, an MG1 rotation shaft, and a ring gear of the transmission device; a gear shift adjustment device that is able to control the transmission device to a neutral state where the transmission of power between the carrier and the ring gear is not allowed or to a state where the transmission of power is allowed; and an HVECU that includes a first step of controlling the transmission device to the neutral state in a state where the transmission of power between the carrier and the ring gear is allowed.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: May 16, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shunya Kato, Atsushi Tabata, Tatsuya Imamura, Tooru Matsubara, Takeshi Kitahata, Kenta Kumazaki, Yasuhiro Hiasa, Hiroyuki Shioiri, Hiroyuki Shibata
  • Patent number: 9562481
    Abstract: In a drive system, a first differential mechanism transmits engine rotation, a second differential mechanism connects the first differential mechanism with drive wheels, and a switching device changes a speed ratio of the first differential mechanism. The second differential mechanism has first, second, and third rotational elements, which connect respectively to the first differential mechanism, a first rotating machine, and a second rotating machine. In a first running condition, the vehicle runs using the second rotating machine as a power source, while differentially operating the first differential mechanism. In a second running condition, the vehicle runs using the second rotating machine as a power source, without differentially operating the first differential mechanism. A region in which the vehicle runs in the second running condition in the case where the engine cannot start by itself is larger than that in the case where the engine can start by itself.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: February 7, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tooru Matsubara, Kenta Kumazaki, Tatsuya Imamura, Takeshi Kitahata, Yasuhiro Hiasa, Atsushi Tabata
  • Patent number: 9551400
    Abstract: A power transmission device of a hybrid vehicle includes: a transmission including a planetary mechanism including a plurality of transmission rotational elements, one of the transmission rotational elements being connected to a rotary shaft of an engine; a differential device including a plurality of differential rotational elements including one connected to one of the transmission rotational elements of the transmission, one connected to a rotary shaft of a first rotary machine, and one connected to a rotary shaft of a second rotary machine and a driven wheel; a transmission control device configured to control the transmission; and a control device configured to control the first rotary machine such that pinion differential rotation of the transmission or the differential device is set to be not higher than a predetermined value at a time unique motor EV driving is performed only by power of the second rotary machine.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: January 24, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasuhiro Hiasa, Atsushi Tabata, Tooru Matsubara, Tatsuya Imamura, Takeshi Kitahata, Kenta Kumazaki
  • Publication number: 20170015298
    Abstract: A control apparatus for an electrically driven vehicle includes a electronic control unit and a dynamic power transmission mechanism. The electronic control unit is configured to control the dynamic power transmission mechanism to execute a slip control such that the speed of an electric motor is a higher speed than a speed of the electric motor at a time point and speed of a relative rotation in the fluid coupling increases, in a case of determining that the operating state of the electric motor enters the operating state in which the value of the heat load is the predetermined value or greater, the time point being a time point when the operating state of the electric motor enters the operating state in which the value of the heat load is the predetermined value or greater.
    Type: Application
    Filed: July 11, 2016
    Publication date: January 19, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya IMAMURA, Atsushi TABATA, Koichi OKUDA, Tooru MATSUBARA, Yasuhiro HIASA, Keita IMAI, Takeshi KITAHATA
  • Publication number: 20170008510
    Abstract: A control apparatus for a dynamic power transmission apparatus is provided. The dynamic power transmission apparatus includes a differential mechanism, an electric generator, an electric motor, and a fluid coupling. The electric motor is disposed at a position apart from a transmission path along which a dynamic power of an engine is transmitted to a driving wheel. The fluid coupling is disposed between the electric motor and the transmission path. The control apparatus includes an electronic controller configured to restrict a charge of an electric storage apparatus with an electric power generated by the electric generator, depending on a state of the electric storage apparatus, and control the fluid coupling to differentially rotate and to drive the electric motor by the electric power such that a dynamic power loss is generated in the fluid coupling, when restricting the charge of the electric storage apparatus.
    Type: Application
    Filed: July 8, 2016
    Publication date: January 12, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya IMAMURA, Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Yasuhiro Hiasa, Keita Imai, Takeshi Kitahata
  • Patent number: 9505399
    Abstract: A vehicle having mounted thereon a differential device including a sun gear, a ring gear and a carrier, a first motor generator coupled to the sun gear, a second motor generator coupled to the ring gear, an automatic transmission provided between the ring gear and a drive wheel, an engine coupled to the carrier, and a brake suppressing the rotation of the carrier. The vehicle has a traveling mode that is selected from a first mode in which traveling is performed by using a torque outputted from the first and second motor generators in a state where the brake is engaged, and a second mode in which the traveling is performed by operating the engine in a state where the brake is disengaged.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: November 29, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Tooru Matsubara, Kenta Kumazaki, Takeshi Kitahata, Yasuhiro Hiasa, Atsushi Tabata
  • Patent number: 9499053
    Abstract: A hybrid vehicle includes electrical storage devices, a charging device, a motor generator, a diode, an outlet and a relay. The first electrical storage device stores driving electric power. The charging device charges the first electrical storage device with the user of a power supply outside the vehicle. The motor generator has a power generation function. The second electrical storage device stores electric power that is generated by the motor generator. When electric power is output to a device outside the vehicle from the outlet, the relay limits electric power, which is output from the first electrical storage device, such that electric power stored in the second electrical storage device is output.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: November 22, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Tooru Matsubara, Kenta Kumazaki, Takeshi Kitahata, Yasuhiro Hiasa, Atsushi Tabata
  • Patent number: 9463789
    Abstract: A control device of a vehicle includes a first electric motor; a differential mechanism having a rotating element coupled to the first electric motor, a rotating element that is an output rotating member coupled to drive wheels in a power transmittable manner, and a rotating element coupled to a non-rotating member by actuation of a lock mechanism; and a second electric motor coupled to the drive wheels in a power transmittable manner. During motor running for running with output torques from the first electric motor and the second electric motor used together in an actuated state of the lock mechanism, a drive torque shared by the first electric motor is made smaller in a requested drive torque when a rotation speed of a pinion making up the differential mechanism is higher.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: October 11, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koichi Okuda, Atsushi Tabata, Keita Imai, Tooru Matsubara, Tatsuya Imamura, Takeshi Kitahata, Kenta Kumazaki, Shunya Kato, Yasuhiro Hiasa, Yuji Iwase, Hiroyuki Shibata
  • Patent number: 9457795
    Abstract: A vehicle control device is configured to select a single motor running, a multiple motor running and an engine running, such that a level of a charging capacity of an electric storage device in which the multiple motor running is selectable is higher than a level of the charging capacity in which the single motor running is selectable. During the single motor running performed with the charging capacity being equal to or greater than a first threshold value, the control device is configured, upon increase of the drive force requested by a driver of the vehicle, to select the multiple motor running when the charging capacity is equal to or greater than a second threshold value that is higher than the first threshold value, and to select the engine running when the charging capacity of the electric storage device is less than the second threshold value.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: October 4, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keita Imai, Tatsuya Imamura, Kouichi Okuda, Tooru Matsubara, Takeshi Kitahata, Kenta Kumazaki, Yasuhiro Hiasa, Shunya Kato, Atsushi Tabata
  • Publication number: 20160264128
    Abstract: A vehicle control system for reducing shocks resulting from restarting an engine under EV running mode. The vehicle control system is applied to a vehicle including an engagement device that selectively connect the engine with the powertrain, and a motor adapted to generate a drive force and connected with the powertrain. In the vehicle, a first mode is selected to propel the vehicle by the motor while interrupting the torque transmission between the engine and the powertrain and stopping the engine, and a second mode is selected to propel the vehicle by the motor while allowing the torque transmission between the engine and the powertrain and stopping the engine. The vehicle control system selects the second mode if a control response of at least any of the engagement device and the motor is estimated to be out of a predetermine range when the vehicle is running while stopping the engine.
    Type: Application
    Filed: August 27, 2014
    Publication date: September 15, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya IMAMURA, Atsushi TABATA, Toshiki KANADA, Tooru MATSUBARA, Yasuhiro HIASA
  • Patent number: 9428179
    Abstract: A power transmission device for a hybrid vehicle includes a transmission device that includes a carrier to which an engine rotation shaft is connected; a differential device that includes a plurality of rotation components individually connected to a ring gear of the transmission device, an MG1 rotation shaft, an MG2 rotation shaft, and a drive wheel; a gear shift adjustment device that includes an engagement portion capable of controlling the transmission device to a neutral state where transmission of power between the carrier and the ring gear is not allowed or to a state where the transmission of power is allowed; and an HVECU that includes a first step of decreasing a rotating speed of a first rotating electric machine at the time an engine is started up during an EV travel mode.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: August 30, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shunya Kato, Atsushi Tabata, Tatsuya Imamura, Tooru Matsubara, Takeshi Kitahata, Kenta Kumazaki, Yasuhiro Hiasa, Hiroyuki Shioiri, Hiroyuki Shibata
  • Patent number: 9415675
    Abstract: Provided is a hybrid vehicle driving device including: a first differential mechanism configured to be connected to an engine and transmit a rotation of the engine; a second differential mechanism configured to connect the first differential mechanism and a driving wheel; and a switching device configured to shift the first differential mechanism, wherein the second differential mechanism includes a first rotation component connected to an output component of the first differential mechanism, a second rotation component connected to the first rotation machine, and a third rotation component connected to the second rotation machine and the driving wheel, and a reaction torque of the first rotation machine is corrected at a torque phase (S2-Y) after a start of the gear shift operation of the first differential mechanism by the switching device while the vehicle travels by using the engine as a power source (S3).
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: August 16, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenta Kumazaki, Tooru Matsubara, Atsushi Tabata, Tatsuya Imamura, Tsuyoshi Kitahata, Yasuhiro Hiasa
  • Publication number: 20160129905
    Abstract: A control system for a hybrid vehicle is provided. The hybrid vehicle includes: a power distribution device having a rotary element connected to an engine, a rotary element connected to a first motor, and a rotary element connected to an output shaft; a second motor that applies a torque to the output shaft; and a halting means that halts an output shaft of the engine. The control system is configured to shift from the first mode in which the vehicle is powered by both the first and the second motors to the second mode in which the vehicle is powered only by the second motor while allowing the output shaft of the engine to rotate by the halting device after reducing an output torque of the first motor to a predetermined value.
    Type: Application
    Filed: August 2, 2013
    Publication date: May 12, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kenta KUMAZAKI, Tooru MATSUBARA, Atsushi TABATA, Tatsuya IMAMURA, Takeshi KITAHATA, Yasuhiro HIASA, Munehiro KATSUMATA, Kazuyuki SHIIBA
  • Patent number: 9233614
    Abstract: In an electric vehicle, an automatic transmission is provided between a differential unit and drive wheels. The differential unit includes a motor-generator and a power split device, and the motor-generator is cooled by lubricant of the automatic transmission. A battery charger is operable to charge a power storage device using a power supply outside the vehicle. When the temperature of the lubricant is lower than a predetermined temperature upon execution of charging of the power storage device using the charger, and the automatic transmission is in a neutral state, or a power cutting-off state, the controller rotates the motor-generator of the differential unit so as to perform warming control for raising the temperature of the lubricant.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: January 12, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Tooru Matsubara, Kenta Kumazaki, Takeshi Kitahata, Yasuhiro Hiasa, Atsushi Tabata