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).

  • Patent number: 10315507
    Abstract: A hybrid vehicle includes a clutch and a transmission unit configured to be able to switch into a neutral state. The hybrid vehicle is able to transmit power of an engine through any one of a first path through which power is transmitted from the engine to a first MG via a transmission unit and a differential unit and another second path through which power is transmitted from the engine to the first MG. The clutch is provided in the second path, and switches between an engaged state and a released state. The controller controls the engine, the first MG, the transmission unit and the clutch. The controller sets the transmission unit to a non-neutral state, sets the clutch to the engaged state, and then causes the vehicle to travel by using driving force from the first MG and driving force from the second MG.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: June 11, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Atsushi Tabata, Toshiki Kanada, Hidehiko Banshoya
  • Patent number: 10286771
    Abstract: A drive unit for a hybrid vehicle an axial length thereof is shortened is provided. A power distribution device is disposed in an inner circumferential side of a cylindrical output gear, and at least a portion of a second clutch is also disposed in the inner circumferential side of the output gear while being adjacent to the power distribution device in an axial direction.
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: May 14, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshiki Kanada, Tatsuya Imamura, Yasuki Yoshikawa, Atsushi Tabata
  • Publication number: 20190084554
    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: Application
    Filed: September 14, 2018
    Publication date: March 21, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masafumi YAMAMOTO, Atsushi TABATA, Tatsuya IMAMURA, Koichi OKUDA, Kota FUJII
  • Publication number: 20190084553
    Abstract: A control device includes an electronic control unit configured to selectively execute traveling in a first traveling mode and traveling in a second traveling mode, the first traveling mode being a traveling mode in which in a state where one engagement device is controlled so as to be engaged, a differential state is controlled by a first rotating machine to transmit torque of an engine, and the second traveling mode being a traveling mode in which in a state where the other engagement device is controlled so as to be engaged, a differential state is controlled to transmit torque of the engine, and perform switching to traveling in the second traveling mode in a case where a vehicle speed is equal to or higher than a predetermined vehicle speed when engine stop control that stops the engine is executed during traveling in the first traveling mode.
    Type: Application
    Filed: June 20, 2018
    Publication date: March 21, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masafumi YAMAMOTO, Atsushi TABATA, Tatsuya IMAMURA, Koichi OKUDA
  • Publication number: 20190084555
    Abstract: A control apparatus for a power transmitting system of a vehicle includes a drive mode control portion for selectively establishing one of first and second engine-braking drive modes in which a braking torque of the engine is applied to the vehicle. The first engine-braking drive mode is established in an engaged state of the first coupling device, while the second engine-braking drive mode is established in an engaged state of the second coupling device. The drive mode control portion switches the power transmitting system between the first and second engine-braking drive modes, such that the engine speed is held constant in the process of switching between the first and second engine-braking drive modes.
    Type: Application
    Filed: September 21, 2018
    Publication date: March 21, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keisuke Omuro, Atsushi Tabata, Tatsuya Imamura, Koichi Okuda
  • Publication number: 20190084404
    Abstract: A control apparatus for a vehicular power transmitting system includes a drive mode setting portion configured to select a first reverse drive mode of the vehicle to be established with an engaging action of the first coupling element, and a required vehicle drive force determining portion configured to determine whether a degree of operation of an accelerator pedal of the vehicle during reverse driving of the vehicle is higher than a predetermined threshold value. The drive mode setting portion selects the first reverse drive mode when the required vehicle drive force determining portion has determined that the degree of operation of the accelerator pedal during the reverse driving of the vehicle is higher than the predetermined threshold value.
    Type: Application
    Filed: September 21, 2018
    Publication date: March 21, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keita IMAI, Koichi OKUDA, Tatsuya IMAMURA, Atsushi TABATA
  • Patent number: 10227068
    Abstract: A control process including the following steps is executed. The control process includes, at the time of switching from series-parallel mode to series mode, a step of reducing an engine torque, a step of releasing a clutch, a step of reducing a reaction torque of a first rotary electric machine and a step of increasing a torque of a second rotary electric machine, and, when synchronization is started and a step of increasing a positive torque of the first MG, a step of starting engagement of a clutch, and, when a rotation speed of the first rotary electric machine and a rotation speed of an engine are synchronous with each other, a step of engaging the clutch.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: March 12, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kiyonori Takagi, Hidehiko Banshoya, Atsushi Kawamoto, Haruhisa Suzuki, Tatsuya Imamura, Toshiki Kanada, Atsushi Tabata
  • Patent number: 10214093
    Abstract: A transmission unit is able to switch between a non-neutral state where power of an engine is transmitted via a path K1 and a neutral state where power of the engine is not transmitted via the path K1. A clutch is able to switch between an engaged state where power is transmitted from the engine to a first MG and a released state where transmission of power from the engine to the first MG is interrupted. When the transmission unit is controlled to the non-neutral state and, at the same time, the clutch is set to the released state, a vehicle is operable in series-parallel mode. When power is transmitted via the path K2 by directly coupling the engine to the first MG by the clutch and the path K1 is interrupted by controlling the transmission unit to the neutral state, the vehicle is operable in series mode.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: February 26, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidehiko Banshoya, Kiyonori Takagi, Atsushi Kawamoto, Haruhisa Suzuki, Tatsuya Imamura, Toshiki Kanada, Atsushi Tabata
  • Patent number: 10190669
    Abstract: A tolerance ring is interposed between an output side rotary shaft and a rotor shaft. For this reason, even in a case where a backlash formed in a spline fitting portion between the output side rotary shaft and the rotor shaft is not eliminated, the rotary shafts of both of the output side rotary shaft and the rotor shaft are held by the tolerance ring without a backlash, and rattling noise can be suppressed. An oil supply groove for supplying a lubricant between an annular portion of the tolerance ring and the output side rotary shaft is provided inside an annular groove formed in the output side rotary shaft. With this, it is possible to suppress degradation of the durability of the tolerance ring without performing special processing on the tolerance ring.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: January 29, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Atsushi Tabata, Haruhisa Suzuki, Koichi Okuda, Hiroyuki Tateno
  • Patent number: 10189344
    Abstract: A hybrid vehicle includes a transmission unit and a clutch. The transmission unit is configured to be able to switch into a neutral state. The hybrid vehicle is able to transmit power of an engine through any one of a first path through which power is transmitted to a first MG from the engine via the transmission unit and a differential unit and another second path through which power is transmitted from the engine. The clutch is provided in the second path. The clutch switches between an engaged state where power is transmitted and a released state where transmission of power is interrupted. The controller sets the transmission unit to the neutral state and sets the clutch to the engaged state, and then starts the engine by increasing the rotation speed of the engine with the use of the first MG.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: January 29, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Atsushi Tabata, Toshiki Kanada
  • Patent number: 10193414
    Abstract: A power transmission apparatus includes a first electric motor, a power split mechanism, a second electric motor, a case, a support wall, and a breather mechanism. The case accommodates the first electric motor, the power split mechanism, and the second electric motor. The support wall is provided between the power split mechanism and the second electric motor. The breather mechanism is located in a rotational angle range that is at least equal to 90 degrees and is smaller than 180 degrees. The breather mechanism has a through hole and a breather chamber. The breather chamber is provided at a case inner side end of the through hole and is opened in a direction that does not oppose a virtual surface that passes through the rotational axis at a rotational angle of 90 degrees of the second electric motor.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: January 29, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Kiyonori Takagi, Hidehiko Banshoya, Atsushi Kawamoto, Haruhisa Suzuki, Kuniaki Ishii, Tooru Matsubara, Kazuyuki Shiiba, Atsushi Tabata, Yuji Yasuda, Junji Matsushita, Katsutoshi Shimizu
  • Patent number: 10173515
    Abstract: A hybrid vehicle is able to select series-parallel mode by engaging a clutch (C1) or a brake (B1) and releasing a clutch (CS), and is able to select series mode by releasing both the clutch (C1) and the brake (B1) and engaging the clutch (CS). The hybrid vehicle includes a simultaneous supply prevention valve (550) that prevents simultaneous engagement of the clutch (CS) and at least one of the clutch (CI) or the brake (B1). When a signal pressure of at least one of hydraulic pressure for engaging the clutch (C1) or hydraulic pressure for engaging the brake (B1) is input to the simultaneous supply prevention valve (550), the simultaneous supply prevention valve (550) is switched to a state where supply of hydraulic pressure to the clutch (CS) is cut off.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: January 8, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidehiko Banshoya, Kiyonori Takagi, Atsushi Kawamoto, Haruhisa Suzuki, Tatsuya Imamura, Toshiki Kanada, Atsushi Tabata
  • Patent number: 10161507
    Abstract: In a non-forward range, the same gear position as a forward first gear position is established in a stepped transmission. A hydraulic controller includes a second linear solenoid valve and third linear solenoid valve that respectively supply hydraulic pressure to a second clutch and first brake, and a selector valve that is provided in an oil passage upstream of the second and third linear solenoid valves and that switches between a state where hydraulic pressure is supplied to the oil passage and a state where supply of hydraulic pressure is cut off. When the non-forward range is set or when a vehicle is moving backward, the selector valve cuts off supply of hydraulic pressure to the oil passage. Thus, when there is a failure in the second or third linear solenoid valve, it is possible to suitably establish a gear position wherein the vehicle is not allowed to move backward.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: December 25, 2018
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Kota Fujii, Koichi Okuda, Atsushi Tabata, Haruhisa Suzuki, Tooru Matsubara, Kazuyuki Noda, Yoshimitsu Hyodo, Kousuke Tanaka
  • 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: 10124795
    Abstract: A driving force control system for a hybrid vehicle is provided to reduce a shock resulting from switching a travelling direction between the forward direction and the backward direction. The control system is applied to a hybrid vehicle in which an operating mode can be selected at least from a series mode and a series parallel mode. A travelling direction of the vehicle is switched by a shifting device between forward direction and backward direction. A controller is configured to maintain the previous operating mode after switching the travelling direction of the vehicle by the shifting device.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: November 13, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Kawanishi, Atsushi Tabata, Tatsuya Imamura
  • 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: 10093165
    Abstract: A control device of a vehicle including a first differential portion, a second differential portion, and a second rotating machine, the first differential portion including a first rotating element, a second rotating element to which a first rotating machine is coupled in a power transmittable manner, and a third rotating element coupled to drive wheels, the first differential portion having a differential state controlled through control of the operational state of the first rotating machine, the second differential portion including a fourth rotating element to which an engine is coupled in a power transmittable manner, a fifth rotating element, and a sixth rotating element to which the first rotating element is coupled, the second rotating machine being coupled to the drive wheels in a power transmittable manner, the vehicle further including at least one engagement device out of a first engagement device and a second engagement device as well as a third engagement device, the first engagement device coupl
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: October 9, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Atsushi Tabata
  • Patent number: 10071727
    Abstract: A control system for a vehicle includes an electronic control unit. The electronic control unit is configured to i) calculate a target supercharging pressure of an intake air such that, when an internal combustion engine is operated through the homogeneous charge compression ignition, the internal combustion engine achieves a required output while satisfying a predetermined requirement, ii) control an output of the internal combustion engine such that the output approaches the required output in accordance with an actual supercharging pressure in process of changing the actual supercharging pressure to the target supercharging pressure that is achieved by a supercharger, and iii) control a rotary machine such that an output of the rotary machine compensates for part or all of a differential output between the required output and the output in process of changing the actual supercharging pressure to the target supercharging pressure.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: September 11, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Atsushi Tabata
  • Patent number: 10065633
    Abstract: A hybrid vehicle includes an electronic control unit configured to, when the drive mode is changed from one of the series-parallel mode and the parallel mode to the other one of the series-parallel mode and the parallel mode and the speed stage is changed from one of the low speed stage and the high speed stage to the other one of the low speed stage and the high speed stage, selectively execute either one of a first control and a second control. The first control is control in which the drive mode and the speed stage are changed by passing through the series mode. The second control is control in which one of the drive mode and the speed stage is changed and then the other one of the drive mode and the speed stage is changed without passing through the series mode.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: September 4, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidehiko Banshoya, Atsushi Tabata, Toshiki Kanada, Haruhisa Suzuki, Atsushi Kawamoto, Tatsuya Imamura, Kiyonori Takagi
  • 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