Patents by Inventor Akiko Nishimine

Akiko Nishimine 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: 20220041066
    Abstract: An electric vehicle is configured to be able to perform running by an MT mode that controls an electric motor with a torque characteristic like an MT vehicle having a manual transmission and an internal combustion engine, and running by an EV mode that controls the electric motor with a normal torque characteristic. The electric vehicle includes a mode changeover switch for switching to the running by the MT mode.
    Type: Application
    Filed: June 22, 2021
    Publication date: February 10, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoichiro ISAMI, Yoshio ITOU, Hiroyuki AMANO, Tatsuya IMAMURA, Akiko NISHIMINE, Hiroaki EBUCHI, Hiroaki KODERA
  • Publication number: 20220041067
    Abstract: The controller of the electric vehicle is configured to control the torque of the electric motor using the MT vehicle model based on the operation amount of the accelerator pedal, the operation amount of the pseudo-clutch pedal, and the shift position of the pseudo-shifter. Further, the controller is configured to execute the stall production process for changing the engine output torque used for calculation of the driving wheel torque to zero when the calculated virtual engine speed using the MT vehicle model becomes lower than the prescribed stall engine speed.
    Type: Application
    Filed: July 19, 2021
    Publication date: February 10, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoichiro ISAMI, Yoshio ITOU, Hiroyuki AMANO, Tatsuya IMAMURA, Akiko NISHIMINE, Hiroaki EBUCHI, Hiroaki KODERA
  • Patent number: 11241951
    Abstract: A drive unit is provided for hybrid vehicles capable of reducing electric power consumption during propulsion in an EV mode. The drive unit includes a first planetary gear unit to which an engine is connected, and a second planetary gear unit connected to a third rotary element of the first planetary gear unit. The drive unit includes a first engagement device that connects a first rotary element of the first planetary gear unit and a sixth rotary element of the second planetary gear unit, and a second engagement device that connects a fourth rotary element and the sixth rotary element of the second planetary gear unit.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: February 8, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki Komada, Takahito Endo, Tatsuya Imamura, Kensei Hata, Akiko Nishimine
  • Patent number: 11027721
    Abstract: A control system for a vehicle that prevents an unintentional mode change when a command signal cannot be transmitted to an engagement device. In the vehicle, HV-Lo mode is established by connecting a carrier to a carrier by a first clutch while disconnecting the carrier from a ring gear by a second clutch, and HV-Lo mode is established by disconnecting the carrier from the carrier by the first clutch while connecting the carrier to the ring gear by the second clutch. A normally stay clutch is used as at least one of the first clutch and the second clutch.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: June 8, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Hideaki Komada, Akiko Nishimine, Yosuke Suzuki, Hidekazu Nagai, Takahito Endo, Hirotsugu Yoshino, Kensei Hata, Hiroki Yasui
  • Patent number: 10780771
    Abstract: A drive device for a hybrid vehicle includes an engine, a first motor, a power split device, a second motor, a first speed reduction unit, a second speed reduction unit, and a differential gear. The first motor generates electric power. The power split device splits drive power output from the engine to the first motor side and a drive wheel side. The second motor increases or decreases torque output from the power split device and to be transmitted to the differential gear. The second motor is coupled to a sun gear. The first speed reduction unit is coupled to the sun gear. The second speed reduction unit is provided between the first speed reduction unit and the differential gear. The differential gear transmits torque to the drive wheel.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: September 22, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei Hata, Hideaki Komada, Akiko Nishimine, Akira Murakami
  • Publication number: 20200215997
    Abstract: A soundproofing device for a transmission according to the present disclosure is provided to transmit the power of one or more prime movers (for example, internal combustion engine and electric motor). The soundproofing device includes a Helmholtz resonator including: a wall that forms a Helmholtz resonance chamber; and an opening formed in the wall so as to cause the Helmholtz resonance chamber to communicate with the outside of the Helmholtz resonance chamber. The wall includes a transmission case that accommodates the transmission and a housing of a component mounted on the transmission (for example, PCU housing). The Helmholtz resonance chamber is formed between the transmission case and the housing.
    Type: Application
    Filed: December 27, 2019
    Publication date: July 9, 2020
    Inventors: Shotaro KATO, Akiko NISHIMINE, Fusahiro TSUKANO, Yu MIYAHARA, Yuya TAKAHASHI, Akinori GOTO, Hiroshi TAKEKAWA
  • Patent number: 10682904
    Abstract: A drive unit for a hybrid vehicle capable of improvement of fuel efficiency during HV running is provided. The drive unit includes an engine, a first motor, a second motor, a first planetary gear unit, a second planetary gear unit, a first engagement unit, and a second engagement unit. In a case where an operation state of the vehicle is high vehicle speed and a low driving force in which a requested driving force is small, by bringing the first engagement unit to an engaged state and the second engagement unit to the disengaged state, a first state where a gear ratio which is a rotation number ratio between an input element and an output element of a complex planetary gear unit becomes a first gear ratio ?2 smaller than “1” is set.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: June 16, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahito Endo, Hideaki Komada, Tatsuya Imamura, Kensei Hata, Akiko Nishimine
  • Publication number: 20200173490
    Abstract: A shaft supporting structure in which a shaft support span is reduced to prevent flexure of the shaft. In the supporting structure, a rotary member is mounted on a rotary shaft supported by bearings to be rotated integrally therewith, and the bearings are supported by a support member. The first bearing and the second bearing are disposed on both sides of the rotary member on the rotary shaft, and the first bearing is disposed between the rotary member and the fastening member in the axial direction of the rotary shaft.
    Type: Application
    Filed: November 29, 2019
    Publication date: June 4, 2020
    Inventors: Masashi SHINODA, Akiko NISHIMINE, Shotaro KATO, Kensei HATA, So OKITA
  • Publication number: 20200149624
    Abstract: A cooling system for a power transmission unit that can supply oil properly to a differential mechanism and motors. The cooling system comprises: a first branch passage to supply the oil to the differential mechanism; a second branch passage to supply the oil to the first motor; and a third branch passage to supply the oil to the second motor. The second branch passage includes a first oil feeding section that supplies the oil to a coil of the first motor, and a second oil feeding section that supplies the oil f to a core of the first motor. The third branch passage includes a third oil feeding section that supplies the oil to a coil of the second motor, and a fourth oil feeding section that supplies the oil to a core of the second motor.
    Type: Application
    Filed: November 8, 2019
    Publication date: May 14, 2020
    Inventors: Kensei Hata, Akiko Nishimine, Shotaro Kato, Masashi Shinoda, So Okita
  • Publication number: 20200139958
    Abstract: A control system for a hybrid vehicle configured to suppress a temperature rise in a transmission while achieving a required driving force without modifying a cooling system. If a temperature in the transmission is lower than a threshold level during propulsion in a hybrid mode, a controller operates an engine at an optimally fuel efficient point. If the temperature in the transmission system is equal to or higher than the threshold level during propulsion in a hybrid mode, the controller shifts the operating point of the engine to the point at which the heat generation in the transmission system can be suppressed.
    Type: Application
    Filed: November 4, 2019
    Publication date: May 7, 2020
    Inventors: Kensei Hata, Akiko Nishimine
  • Patent number: 10562520
    Abstract: A control device for a vehicle includes an electronic control unit. The electronic control unit, when switching a traveling mode of the vehicle, is configured to control an amount of torque change produced in a drive power source for traveling subjected to switching in operation upon switching of the traveling mode, such that the amount of torque change during manual driving is larger than that during autonomous driving.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: February 18, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akiko Nishimine, Tatsuya Imamura
  • Patent number: 10525816
    Abstract: Provided is a drive unit for a hybrid vehicle which can increase selectable modes in an EV mode. A drive unit includes a first planetary gear unit connected to an engine, and a second planetary gear unit connected to a second rotary element of the first planetary gear unit. The drive unit includes a first engagement device which connects rotary elements of the first planetary gear unit, a third rotary element in the first planetary gear unit, a second engagement device which connects any one of a fifth rotary element and a sixth rotary element in the second planetary gear unit, and a third engagement device which can fix a first rotary element of the first planetary gear unit.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: January 7, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya Imamura, Hideaki Komada, Takahito Endo, Kensei Hata, Akiko Nishimine
  • Patent number: 10502261
    Abstract: A concave portion provided in at least one of the first assembled surface, and other assembled surfaces for fastening the driving force source, in the region corresponding to the outer race of the tapered roller bearing, the other assembled surfaces provided to one of the fixed component and the driving force source.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: December 10, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koichi Kato, Shinichi Baba, Shinichiro Suenaga, Iori Matsuda, Michitaka Tsuchida, Akiko Nishimine
  • Patent number: 10393255
    Abstract: A traveling control device for a vehicle includes an electronic control device. The vehicle includes a transmission constituting a part of a power transmission path between a drive power source and drive wheels. The electronic control device is configured to execute a gear shift of the transmission based on a traveling state, switch automatic driving by automatic driving control and manual driving by a driving operation from a driver, and inhibit switching between the automatic driving and the manual driving until the gear shift of the transmission is completed after the gear shift of the transmission starts.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: August 27, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Akiko Nishimine
  • Patent number: 10337603
    Abstract: A lubricating structure is for a hybrid vehicle that includes an engine, a first motor, and a second motor as driving force sources. The lubricating structure includes a planetary gear mechanism, a brake mechanism, an oil pump, and a first oil supply mechanism. The brake mechanism selectively fixes a carrier of the planetary gear mechanism by stopping rotation of the carrier. The oil pump is driven by a predetermined power to generate a hydraulic pressure of oil in a state in which the rotation of the carrier is stopped by the brake mechanism. The first oil supply mechanism feeds the oil to an axis portion of each of pinion gears of the planetary gear mechanism by the oil pump generating the hydraulic pressure.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: July 2, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Akiko Nishimine
  • Patent number: 10323632
    Abstract: A lubricating oil supply device for a vehicle includes an electric oil pump and an electronic control unit. The electronic control unit is configured to control the electric oil pump, determine whether or not lubricating oil needs to be supplied by the electric oil pump, control a drive duty of the electric oil pump to a first value when the ECU determines that lubricating oil needs to be supplied, and control the drive duty to a second value that is smaller than the first value when the ECU determines that lubricating oil does not need to be supplied. The electronic control unit is configured to perform duty variable control for controlling the drive duty to a third value, which is between the first value and the second value, during a predetermined changeover transition period, in changing over the drive duty from the first value to the second value.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: June 18, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kaoru Goto, Akiko Nishimine
  • Publication number: 20190143962
    Abstract: A control system for a vehicle that prevents an unintentional mode change when a command signal cannot be transmitted to an engagement device. In the vehicle, HV-Lo mode is established by connecting a carrier to a carrier by a first clutch while disconnecting the carrier from a ring gear by a second clutch, and HV-Lo mode is established by disconnecting the carrier from the carrier by the first clutch while connecting the carrier to the ring gear by the second clutch. A normally stay clutch is used as at least one of the first clutch and the second clutch.
    Type: Application
    Filed: November 9, 2018
    Publication date: May 16, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuya IMAMURA, Hideaki KOMADA, Akiko NISHIMINE, Yosuke SUZUKI, Hidekazu NAGAI, Takahito ENDO, Hirotsugu YOSHINO, Kensei HATA, Hiroki YASUI
  • Publication number: 20190118639
    Abstract: A drive device for a hybrid vehicle includes an engine, a first motor, a power split device, a second motor, a first speed reduction unit, a second speed reduction unit, and a differential gear. The first motor generates electric power. The power split device splits drive power output from the engine to the first motor side and a drive wheel side. The second motor increases or decreases torque output from the power split device and to be transmitted to the differential gear. The second motor is coupled to a sun gear. The first speed reduction unit is coupled to the sun gear. The second speed reduction unit is provided between the first speed reduction unit and the differential gear. The differential gear transmits torque to the drive wheel.
    Type: Application
    Filed: October 5, 2018
    Publication date: April 25, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei HATA, Hideaki KOMADA, Akiko NISHIMINE, Akira MURAKAMI
  • Patent number: 10232838
    Abstract: A control device for a vehicle, the vehicle includes a transmission provided in a power transmission path between a drive power source and drive wheels. The control device includes an electronic control unit configured to i) shift the transmission according to traveling conditions, ii) switch a driving mode for running the vehicle between autonomous driving under autonomous driving control, and manual driving based on driving operation of a driver, and iii) shift the transmission such that a shift time required for shifting of the transmission during the manual driving is shorter than a shift time required for shifting of the transmission during the autonomous driving.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: March 19, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Akiko Nishimine
  • Patent number: 10197151
    Abstract: By providing an auxiliary check valve in parallel with a check valve installed in an electric oil pump, it is possible to measure an oil temperature even when the check valve is stuck. A flow resistance of an oil passage of the auxiliary check valve is set so as to be larger than that of the check valve, and a minimum valve open pressure difference of the auxiliary check valve is set so as to be smaller than that of the check valve. Thus, it is possible to further accurately measure an oil temperature and determine a fault. By using a rotation speed of the electric oil pump and an oil temperature in determining whether there is a fault in the electric oil pump or in the oil passage, it is possible to reduce the influence of variations, or the like, in measurement of a temperature sensor.
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: February 5, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Akiko Nishimine