Patents by Inventor Takeshi Miyagawa

Takeshi Miyagawa 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: 11248693
    Abstract: A vehicle gear includes: a disk portion having a disk shape and a plurality of through holes formed in a circumference direction thereof; and an outer circumference portion having outer circumference teeth formed on an outer circumference side of the disk portion. Further, each of the through holes includes first and second holes (82A, 82B) formed on one and another ends, respectively, thereof in the circumference direction, and a width of the first hole is larger than a width of the second hole in a radial direction of the disk portion.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: February 15, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Takeshi Miyagawa
  • Publication number: 20200124156
    Abstract: A vehicle gear includes: a disk portion having a disk shape and a plurality of through holes formed in a circumference direction thereof; and an outer circumference portion having outer circumference teeth formed on an outer circumference side of the disk portion. Further, each of the through holes includes first and second holes (82A, 82B) formed on one and another ends, respectively, thereof in the circumference direction, and a width of the first hole is larger than a width of the second hole in a radial direction of the disk portion.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 23, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Takeshi MIYAGAWA
  • Publication number: 20190107196
    Abstract: A parking lock mechanism comprises: a parking gear; a plate-shaped parking pawl provided with a lock claw; and a cam mechanism including a cam in contact with the parking pawl and moving the cam in parallel with a rotation axis of the parking gear to pivot the parking pawl, the parking pawl having a plate thickness made larger in a portion provided with the lock claw as compared to the other portions of the parking pawl. The portion provided with the lock claw of the parking pawl has a surface that is formed on the front side in a movement direction of the cam at the time of switching from the non-lock state to the lock state and that bulges in the movement direction.
    Type: Application
    Filed: October 1, 2018
    Publication date: April 11, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hidehiko BANSHOYA, Mitsuaki TOMITA, Takeshi MIYAGAWA
  • Patent number: 10208807
    Abstract: Since a friction force generated on friction surfaces between a pressure plate and a first friction material is smaller than a friction force generated on friction surfaces between a lining plate and the first friction material, when a torque is input to a damper device, a slip first occurs between the pressure plate and the first friction material, and the lining plate and the first friction material integrally rotate. In this case, a hysteresis torque is generated based on the friction force between the pressure plate and the first friction material. Since a torque limiter mechanism also acts as a hysteresis mechanism in this way, a torque limiter mechanism is realized that can generate the hysteresis torque with a simple structure.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: February 19, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Miyagawa, Satoru Takahashi
  • Patent number: 9896088
    Abstract: A drive control system for a hybrid vehicle is provided to shift an operating mode smoothly to an electric vehicle mode in which an engine is stopped. A controller is configured to select the electric vehicle mode to be established from the first electric vehicle mode and the second electric vehicle mode upon satisfaction of the determination to shift the operating mode to the electric vehicle mode, to select the clutch to be engaged from the first clutch and the second clutch to establish the selected electric vehicle mode, and to stop the engine while engaging the selected clutch.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: February 20, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi Miyagawa, Atsushi Tabata, Tatsuya Imamura
  • Publication number: 20170166200
    Abstract: A drive control system for a hybrid vehicle is provided to shift an operating mode smoothly to an electric vehicle mode in which an engine is stopped. A controller is configured to select the electric vehicle mode to be established from the first electric vehicle mode and the second electric vehicle mode upon satisfaction of the determination to shift the operating mode to the electric vehicle mode, to select the clutch to be engaged from the first clutch and the second clutch to establish the selected electric vehicle mode, and to stop the engine while engaging the selected clutch.
    Type: Application
    Filed: December 9, 2016
    Publication date: June 15, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi MIYAGAWA, Atsushi TABATA, Tatsuya IMAMURA
  • Publication number: 20160160933
    Abstract: Since a friction force generated on friction surfaces between a pressure plate and a first friction material is smaller than a friction force generated on friction surfaces between a lining plate and the first friction material, when a torque is input to a damper device, a slip first occurs between the pressure plate and the first friction material, and the lining plate and the first friction material integrally rotate. In this case, a hysteresis torque is generated based on the friction force between the pressure plate and the first friction material. Since a torque limiter mechanism also acts as a hysteresis mechanism in this way, a torque limiter mechanism is realized that can generate the hysteresis torque with a simple structure.
    Type: Application
    Filed: February 18, 2016
    Publication date: June 9, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takeshi MIYAGAWA, Satoru TAKAHASHI
  • Patent number: 9242634
    Abstract: The control device of the present invention causes an engine to perform both partial cylinder operation and also all-cylinder operation, and moreover changes the operating point of the engine when the motor torque of a second motor-generator enters into operating point changeover ranges R1 and R2. The operating point changeover range R2 when the engine is performing partial cylinder operation is set to be wider, as compared to the operating point changeover range R1 when the engine is performing all-cylinder operation.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: January 26, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoru Takahashi, Takeshi Miyagawa, Noritaka Nakajima, Kouki Kawamoto, Daiki Sato, Masato Nakano, Akihiro Sato, Takeshi Kanayama, Shinichiro Suenaga
  • 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: 9233606
    Abstract: A vehicle drive device has an outer rotor type electric motor with a rotor disposed on an outer circumferential side of a stator including a first power transmission path coupling an inside of the rotor and drive wheels; and a second power transmission path coupling an outside of the rotor and the drive wheels, the first power transmission path and the second power transmission path having different gear ratios, one power transmission path of the first power transmission path and the second power transmission path being coupled to the drive wheels to make a gear change.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: January 12, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoru Takahashi, Yasushi Kobiki, Isao Sato, Takeshi Miyagawa, Hiroaki Kiyokami
  • 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
  • Publication number: 20150258976
    Abstract: The control device of the present invention causes an engine to perform both partial cylinder operation and also all-cylinder operation, and moreover changes the operating point of the engine when the motor torque of a second motor-generator enters into operating point changeover ranges R1 and R2. The operating point changeover range R2 when the engine is performing partial cylinder operation is set to be wider, as compared to the operating point changeover range R1 when the engine is performing all-cylinder operation.
    Type: Application
    Filed: November 30, 2012
    Publication date: September 17, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoru Takahashi, Takeshi Miyagawa, Noritaka Nakajima, Kouki Kawamoto, Daiki Sato, Masato Nakano, Akihiro Sato, Takeshi Kanayama, Shinichiro Suenaga
  • 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: 9085299
    Abstract: A drive control device for a hybrid vehicle is provided with a differential device including four rotary elements; and an engine, first and second electric motors and an output rotary member which are respectively connected to the four rotary elements. One of the four rotary elements is constituted by a rotary component of a first differential mechanism and a rotary component of a second differential mechanism selectively connected through a clutch, and one of the rotary components of the first and second differential mechanisms which are selectively connected to each other through the clutch is selectively fixed to a stationary member through a brake. The drive control device comprises: an electric motor operation control portion configured to control the second electric motor for starting the engine with an output torque of the second electric motor, when a reaction force is exerted on the first and second electric motors.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: July 21, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoru Takahashi, Tomoyuki Maruyama, Hiroaki Kiyokami, Satoshi Kasamai, Koki Ueno, Takeshi Miyagawa, Norihiro Yamamura, Yoshitaka Suzuki, Hiroki Kuwamoto, Tomohito Ono
  • 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
  • Patent number: 9026291
    Abstract: A vehicle hybrid drive device having an EV running mode enabling a vehicle to run only with a second rotating machine used as a drive power source while an engine is disconnected from a drive power transmission path, a series HEV running mode enabling the vehicle to run only with the second rotating machine used as the drive power source while a first rotating machine is rotationally driven to generate electricity by the engine disconnected from the drive power transmission path, and a parallel HEV running mode enabling the vehicle to run with the engine and at least one of the first and second rotating machines used as the drive power sources while the engine is connected to the drive power transmission path. If a driver desires power-performance-oriented running or fuel-efficiency-oriented running, the range for selecting the series HEV running mode is made narrower or wider, respectively, than usual.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: May 5, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Koji Hayashi, Takeshi Kanayama, Tetsuo Hori, Ryoki Ii, Tomoaki Furukawa, Akiko Nishimine, Takeshi Miyagawa, Tomoyuki Maruyama, Norihiro Yamamura, Akihiro Sato
  • Publication number: 20150073635
    Abstract: A drive control device for a hybrid vehicle is provided with a differential device including four rotary elements; and an engine, first and second electric motors and an output rotary member which are respectively connected to the four rotary elements. One of the four rotary elements is constituted by a rotary component of a first differential mechanism and a rotary component of a second differential mechanism selectively connected through a clutch, and one of the rotary components of the first and second differential mechanisms which are selectively connected to each other through the clutch is selectively fixed to a stationary member through a brake. The drive control device comprises: an electric motor operation control portion configured to control the second electric motor for starting the engine with an output torque of the second electric motor, when a reaction force is exerted on the first and second electric motors.
    Type: Application
    Filed: March 21, 2012
    Publication date: March 12, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoru Takahashi, Tomoyuki Maruyama, Hiroaki Kiyokami, Satoshi Kasamai, Koki Ueno, Takeshi Miyagawa, Norihiro Yamamura, Yoshitaka Suzuki, Hiroki Kuwamoto, Tomohito Ono
  • Publication number: 20150011347
    Abstract: A vehicle drive device has an outer rotor type electric motor with a rotor disposed on an outer circumferential side of a stator, comprising: a first power transmission path coupling an inside of the rotor and drive wheels; and a second power transmission path coupling an outside of the rotor and the drive wheels, the first power transmission path and the second power transmission path having different gear ratios, one power transmission path of the first power transmission path and the second power transmission path being coupled to the drive wheels to make a gear change.
    Type: Application
    Filed: March 2, 2012
    Publication date: January 8, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoru Takahashi, Yasushi Kobiki, Isao Sato, Takeshi Miyagawa, Hiroaki Kiyokami