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).

  • Patent number: 9657612
    Abstract: A control system for electric vehicle is provided. The control system is applied to an electric vehicle (Ve) having a motor (2, 3) and an electric oil pump (19) driven by a pumping motor (20). The control system is configured to activate the electric oil pump (19) with a predetermined duty cycle when a main switch is turned on to bring the vehicle (Ve) into a ready-on state where the vehicle (Ve) is ready to travel.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: May 23, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Akiko Nishimine
  • Patent number: 9573587
    Abstract: A drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to; obtain at least one of a first time that is a duration of a motor driven state or a second time that is a duration of a state where the motor driven state is ended, estimate a temperature of the power split mechanism based on at least one of the first time or the second time, and allow or inhibit the motor driven state in accordance with a temperature of the power split mechanism, the first time, or the second time.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: February 21, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei Hata, Yuji Iwase, Yosuke Suzuki, Akiko Nishimine, Sohei Murata
  • Patent number: 9555794
    Abstract: A drive control system is for a hybrid vehicle. The drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to obtain a temperature of the power split mechanism based on a first time that is a duration of a motor driven state, allow the motor driven state when the obtained temperature obtained by the electronic control unit is lower than a predetermined upper limit temperature, and inhibit the motor driven state when the obtained temperature is higher than or equal to the upper limit temperature.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: January 31, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei Hata, Yuji Iwase, Yosuke Suzuki, Akira Murakami, Akiko Nishimine, Sohei Murata
  • Patent number: 9528404
    Abstract: A power transmission device has a first check valve and a second check valve on the respective discharge passages. An oil temperature sensor is disposed at a position that is vertically lower than an oil-introducing portion of a merging section.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: December 27, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroaki Kimura, Akiko Nishimine, Takeshi Kuwahara, Ryota Takayanagi
  • Publication number: 20160280215
    Abstract: A control system for hybrid vehicles that ensures high motor power while limiting damage on a planetary gear unit is provided. In a planetary gear unit, a sun gear is connected to a first motor, a ring gear is connected to a second motor, and a carrier is connected to an engine. An operating mode of the hybrid vehicle can be selected from a hybrid mode, a single-motor mode, and a dual-motor mode. The control system is configured to shift the operating mode to the hybrid mode if an estimated temperature of the pinion gear is higher than a threshold temperature (step S5), and to the single-motor mode if the estimated temperature of the pinion gear is lower than a threshold temperature (step S7).
    Type: Application
    Filed: February 29, 2016
    Publication date: September 29, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Akiko NISHIMINE
  • Publication number: 20160265652
    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: Application
    Filed: March 11, 2016
    Publication date: September 15, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Akiko Nishimine
  • Publication number: 20160207519
    Abstract: A drive control system for a hybrid vehicle comprises a lubricating oil passage, a first oil pump, an electronic control unit, and an electronic control unit. The lubricating oil passage is configured to supply lubricating oil to the power split mechanism by causing the lubricating oil to flow outward in a radial direction of a power split mechanism. The first oil pump is configured to be allowed to be driven by a first motor, and configured to generate hydraulic pressure of the lubricating oil that lubricates the power split mechanism. The electronic control unit is configured to, when the hybrid vehicle is set to a one-motor mode after traveling in a two-motor mode, execute control for increasing an amount of the lubricating oil that is supplied to the power split mechanism by driving the first motor.
    Type: Application
    Filed: January 13, 2016
    Publication date: July 21, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei HATA, Yuji IWASE, Yosuke SUZUKI, Yota MIZUNO, Akiko NISHIMINE, Sohei MURATA
  • Publication number: 20160176392
    Abstract: A control system for a hybrid vehicle includes an electronic control unit. The electronic control unit is configured to, when any one of the following conditions iii) to vi) is satisfied, activate the oil pump to start supplying oil to a power split mechanism: iii) a required driving force becomes larger than or equal to a first pump changing value when a first drive mode is selected; iv) a vehicle speed becomes higher than or equal to a second pump changing value when the first drive mode is selected; v) the required driving force becomes smaller than or equal to a third pump changing value when the third drive mode is selected; and vi) the vehicle speed becomes lower than or equal to a fourth pump changing value when the third drive mode is selected.
    Type: Application
    Filed: December 9, 2015
    Publication date: June 23, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Sohei MURATA, Akiko NISHIMINE, Kensei HATA, Yosuke SUZUKI
  • Publication number: 20160137050
    Abstract: A hybrid vehicle uses a first motor, a second motor and an engine as driving force sources and includes a gear transmission mechanism and an oil supply mechanism. The gear transmission mechanism transmits torque, output from the first motor, to a drive shaft side. The oil supply mechanism is driven by power other than power of the engine to supply oil to the gear transmission mechanism. When the hybrid vehicle is caused to travel by using the torque output from at least the first motor in a state where operation of the engine is stopped, and when an estimated amount of oil that is supplied from the oil supply mechanism to the gear transmission mechanism is smaller than or equal to a predetermined amount, an electronic control unit limits an operation state of the first motor such that load on the gear transmission mechanism decreases.
    Type: Application
    Filed: November 18, 2015
    Publication date: May 19, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akiko NISHIMINE, Yota MIZUNO, Sohei MURATA, Kensei HATA
  • Publication number: 20160101776
    Abstract: A drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to; obtain at least one of a first time that is a duration of a motor driven state or a second time that is a duration of a state where the motor driven state is ended, estimate a temperature of the power split mechanism based on at least one of the first time or the second time, and allow or inhibit the motor driven state in accordance with a temperature of the power split mechanism, the first time, or the second time.
    Type: Application
    Filed: October 9, 2015
    Publication date: April 14, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei HATA, Yuji IWASE, Yosuke SUZUKI, Akiko NISHIMINE, Sohei MURATA
  • Publication number: 20160101771
    Abstract: A drive control system is for a hybrid vehicle. The drive control system includes a power split mechanism, a brake mechanism, a first motor, an output member, a second motor and an electronic control unit. The electronic control unit is configured to obtain a temperature of the power split mechanism based on a first time that is a duration of a motor driven state, allow the motor driven state when the obtained temperature obtained by the electronic control unit is lower than a predetermined upper limit temperature, and inhibit the motor driven state when the obtained temperature is higher than or equal to the upper limit temperature.
    Type: Application
    Filed: October 8, 2015
    Publication date: April 14, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei HATA, Yuji IWASE, Yosuke SUZUKI, Akira MURAKAMI, Akiko NISHIMINE, Sohei MURATA
  • Publication number: 20160101773
    Abstract: A drive control system for preventing damage from a power distribution device under a motor mode and for improving fuel efficiency. A time duration from termination of the first operating mode where a torque of the first motor is applied to the power distribution device while halting a carrier (at step S4), and a temperature of the power distribution device is estimated based on the calculated time duration (at step S13). The first operating mode is enabled if the estimated temperature is lower than a predetermined allowable temperature (at step S15), and inhibited if the estimated temperature is higher than the allowable temperature (at step S10).
    Type: Application
    Filed: October 8, 2015
    Publication date: April 14, 2016
    Inventors: Kensei HATA, Yuji IWASE, Yosuke SUZUKI, Akira MURAKAMI, Akiko NISHIMINE, Sohei MURATA
  • Publication number: 20160069231
    Abstract: A control system for electric vehicle is provided. The control system is applied to an electric vehicle (Ve) having a motor (2, 3) and an electric oil pump (19) driven by a pumping motor (20). The control system is configured to activate the electric oil pump (19) with a predetermined duty cycle when a main switch is turned on to bring the vehicle (Ve) into a ready-on state where the vehicle (Ve) is ready to travel.
    Type: Application
    Filed: August 13, 2015
    Publication date: March 10, 2016
    Inventor: Akiko Nishimine
  • Publication number: 20160069428
    Abstract: A downsized hydraulic system for a vehicle having a mechanical oil pump and an electric oil pump is provided. The hydraulic system comprises a first check valve allowing oil to flow only from the mechanical oil pump to an oil requiring site, and a second check valve allowing oil to flow only from the electric oil pump to an oil requiring site. The first check valve comprises a first port connected to an outlet of the mechanical oil pump, a second port connected to an outlet port of the second check valve, and a third port connected to the oil requiring site. The first check valve is adapted to provide a communication among those three ports by opening the first port, and provided with a through guide allowing the oil to flow between the second port and the third port even when the first port is closed.
    Type: Application
    Filed: September 4, 2015
    Publication date: March 10, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryota TAKAYANAGI, Akiko NISHIMINE, Hiroaki KIMURA
  • Patent number: 9233683
    Abstract: A vehicle control apparatus configured to selectively establish one of a first drive state in which a vehicle drive force is generated primarily by a second motor/generator operated with an electric energy supplied from an electric-energy storage device while an engine is placed in a rest state, and a second drive state in which a first motor/generator is operated with a drive force of the engine, to generate an electric energy and in which the vehicle drive force is generated primarily by the second motor/generator operated with at least the electric energy generated by the first motor/generator. The vehicle control apparatus is further configured such that the vehicle drive force generated in the second drive state at a given value of an accelerator pedal operation amount ?acc is larger than that generated in the first drive state.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: January 12, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryoki Il, Akihiro Sato, Norihiro Yamamura, Akiko Nishimine, Tomoyuki Maruyama, Takeshi Miyagawa, Tomoaki Furukawa, Takeshi Kanayama, Tetsuo Hori, Koji Hayashi
  • Patent number: 9199626
    Abstract: A control device of a vehicle includes: an engine; a connection/disconnection device configured to connect/interrupt the engine; a rotating machine disposed to enable transmission of drive power to the wheels; and a running position selection device, the control device including a first manual mode selected by performing a deceleration increasing operation by a driver for increasing vehicle deceleration while the automatic running position is selected and a second manual mode selected by performing a deceleration increasing operation by a driver for increasing the vehicle deceleration while the manual running position is selected, while the vehicle is running with the engine interrupted from the wheels, if the first manual mode is selected, the vehicle deceleration being generated only by the rotating machine, and if the second manual mode is selected, the connection/disconnection device being put into the connected state to generate the vehicle deceleration at least by the engine.
    Type: Grant
    Filed: April 27, 2011
    Date of Patent: December 1, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomoaki Furukawa, Takeshi Kanayama, Tetsuo Hori, Tomoyuki Maruyama, Akiko Nishimine, Takeshi Miyagawa, Ryoki Ii, Koji Hayashi, Norihiro Yamamura, Akihiro Sato
  • Patent number: 9168860
    Abstract: A vehicular indicator device for a hybrid vehicle which is provided with vehicle drive power sources in the form of an engine and an electric motor and which is driven in one of a plurality of vehicle drive modes including an EV drive mode, a series HV drive mode and a parallel HV drive mode that is automatically selected according to a vehicle drive power, said indicator device being configured to indicate the selected vehicle drive mode and said vehicle drive power, the vehicular indicator device being configured to indicate a running state of the hybrid vehicle as represented by said vehicle drive power and said selected vehicle drive mode, in a two-dimensional coordinate system on a display screen, which coordinate system is defined by said vehicle drive power and said selected vehicle drive mode.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: October 27, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Norihiro Yamamura, Koji Hayashi, Takeshi Kanayama, Tetsuo Hori, Tomoyuki Maruyama, Akiko Nishimine, Takeshi Miyagawa, Ryoki Il, Tomoaki Furukawa, Akihiro Sato
  • Patent number: 9102322
    Abstract: A vehicle control apparatus configured to selectively establish one of a first drive state in which a vehicle drive force is generated primarily by a second motor/generator operated with an electric energy supplied from an electric-energy storage device while an engine is placed in a rest state, and a second drive state in which a first motor/generator is operated with a drive force of the engine, to generate an electric energy and in which the vehicle drive force is generated primarily by the second motor/generator operated with at least the electric energy generated by the first motor/generator. The vehicle control apparatus is further configured such that the vehicle drive force generated in the second drive state at a given value of an accelerator pedal operation amount ?acc is larger than that generated in the first drive state.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: August 11, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Ryoki Il, Akihiro Sato, Norihiro Yamamura, Akiko Nishimine, Tomoyuki Maruyama, Takeshi Miyagawa, Tomoaki Furukawa, Takeshi Kanayama, Tetsuo Hori, Koji Hayashi
  • Publication number: 20150203095
    Abstract: A vehicle control apparatus configured to selectively establish one of a first drive state in which a vehicle drive force is generated primarily by a second motor/generator operated with an electric energy supplied from an electric-energy storage device while an engine is placed in a rest state, and a second drive state in which a first motor/generator is operated with a drive force of the engine, to generate an electric energy and in which the vehicle drive force is generated primarily by the second motor/generator operated with at least the electric energy generated by the first motor/generator. The vehicle control apparatus is further configured such that the vehicle drive force generated in the second drive state at a given value of an accelerator pedal operation amount ?acc is larger than that generated in the first drive state.
    Type: Application
    Filed: February 24, 2015
    Publication date: July 23, 2015
    Inventors: Ryoki II, Akihiro SATO, Norihiro YAMAMURA, Akiko NISHIMINE, Tomoyuki MARUYAMA, Takeshi MIYAGAWA, Tomoaki FURUKAWA, Takeshi KANAYAMA, Tetsuo HORI, Koji HAYASHI
  • Patent number: 9061679
    Abstract: A control apparatus for a hybrid vehicle includes: engine starting means for starting an engine when a need for switching to a 4-wheel drive mode has been forecasted, the hybrid vehicle having a series HV drive mode in which the hybrid vehicle is run with a second electric motor, in the released state of a connecting/disconnecting device, while a first electric motor is operated with a drive force of said engine to generate an electric energy, the control apparatus further including, as said engine starting means, series HV drive controlling means for starting said engine and enlarging a series HV drive mode region for running the hybrid vehicle in said series HV drive mode, so as to cover a portion or an entirety of an original EV drive mode region for running the hybrid vehicle in said EV drive mode, when the need for switching to said 4-wheel drive mode has been forecasted.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: June 23, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoyuki Maruyama, Norihiro Yamamura, Akiko Nishimine, Ryoki Il, Tomoaki Furukawa, Takeshi Kanayama, Tetsuo Hori, Koji Hayashi, Takeshi Miyagawa, Akihiro Sato