Patents by Inventor Teruhiko NAKAZAWA

Teruhiko NAKAZAWA 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: 11047453
    Abstract: A planetary gear mechanism has a first planetary gear train that includes a ring gear to which power from a main power source is input, a planetary carrier that is connected to a first output shaft, a first planetary pinion that is turnably supported by the planetary carrier, and a first sun gear that is connected to a distribution electric motor. The planetary gear mechanism also has a second planetary gear train that includes the ring gear, the planetary carrier, the first planetary pinion, a second planetary pinion that is turnably supported by the planetary carrier, and a second sun gear that is connected to a second output shaft.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: June 29, 2021
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Yasumitsu Osada, Teruhiko Nakazawa, Atsushi Suzuki, Hiroyuki Nishizawa, Yasuhiro Torii
  • Patent number: 10926647
    Abstract: A vehicle driving apparatus includes a first motor, a second motor, and a planetary mechanism, and obtains a driving force by combining motive forces obtained from the first motor and the second motor by a planetary gear of the planetary mechanism. The vehicle driving apparatus includes at least one of a design value and a control quantity in which a frequency ratio between a sound generated by a rotation of the first motor and a sound generated by a rotation of the second motor satisfies a reduction condition of dissonance.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: February 23, 2021
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Teruhiko Nakazawa, Ryoichi Hibino, Makoto Kusakabe, Yasumitsu Osada, Shoji Nakahara, Hiroyuki Nishizawa, Yasuhiro Torii
  • Publication number: 20190329658
    Abstract: A vehicle driving apparatus includes a first motor, a second motor, and a planetary mechanism, and obtains a driving force by combining motive forces obtained from the first motor and the second motor by a planetary gear of the planetary mechanism. The vehicle driving apparatus includes at least one of a design value and a control quantity in which a frequency ratio between a sound generated by a rotation of the first motor and a sound generated by a rotation of the second motor satisfies a reduction condition of dissonance.
    Type: Application
    Filed: April 19, 2019
    Publication date: October 31, 2019
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Teruhiko NAKAZAWA, Ryoichi HIBINO, Makoto KUSAKABE, Yasumitsu OSADA, Shoji NAKAHARA, Hiroyuki NISHIZAWA, Yasuhiro TORII
  • Publication number: 20190316655
    Abstract: A planetary gear mechanism has a first planetary gear train that includes a ring gear to which power from a main power source is input, a planetary carrier that is connected to a first output shaft, a first planetary pinion that is turnably supported by the planetary carrier, and a first sun gear that is connected to a distribution electric motor. The planetary gear mechanism also has a second planetary gear train that includes the ring gear, the planetary carrier, the first planetary pinion, a second planetary pinion that is turnably supported by the planetary carrier, and a second sun gear that is connected to a second output shaft.
    Type: Application
    Filed: March 19, 2019
    Publication date: October 17, 2019
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Yasumitsu OSADA, Teruhiko NAKAZAWA, Atsushi SUZUKI, Hiroyuki NISHIZAWA, Yasuhiro TORII
  • Publication number: 20190176645
    Abstract: A target value obtaining section obtains a target value for the difference in rotational motion between a first motor and a second motor and a target value for output torque. A torque command value calculating section calculates a torque command value for the first motor and a torque command value for the second motor that achieve both of the target value for the difference in rotational motion and the target value for the output torque by using an inverse model of a motion model corresponding to a merging system.
    Type: Application
    Filed: November 19, 2018
    Publication date: June 13, 2019
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Teruhiko NAKAZAWA, Ryoichi HIBINO, Hiroyuki NISHIZAWA, Atsushi KAWAGUCHI, Gentaro YAMANAKA, Yasushi AMANO, Masaru SUGAI, Yasuhiro TORII
  • Patent number: 9739351
    Abstract: When a chain is wound around a pulley, a pin-pulley contact point as a contact point of a pin of the chain with the pulley slides and moves on a conical surface of the pulley. A contact point slip distance, namely the distance by which the pin-pulley contact point moves on the conical surface at this time, is associated with an offset. The offset is the distance between a pin-pin contact point, which is a contact point between the pins at the time the chain is in a linear state, and the pin-pulley contact point in a y-axis direction. Offsets that minimize the contact point slip distance at the maximum running radius and the minimum running radius of the chain are obtained, and the offset is set between these values. The pin-pulley contact point is set close to the pin-pin contact point of the chain in the linear state.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: August 22, 2017
    Assignee: JTEKT CORPORATION
    Inventors: Shinji Yasuhara, Taizou Wakayama, Teruhiko Nakazawa
  • Patent number: 9464688
    Abstract: Three links within one width-direction unit are included in respectively different link units. The links in the first row and the sixth row from the right end and the left end of a chain are included in the same link unit. The links in the second row and the fifth row are included in the same link unit. The links in the ninth row and the tenth row are included in the same link unit other than the link unit in which the links in the second row and the fifth row are included. With the above structure, the stress amplitude of the links forming a chain for a chain-type continuously variable transmission can be reduced.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: October 11, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Teruhiko Nakazawa, Ichiro Tarutani, Yuji Nagasawa, Shinji Yamane, Keisuke Mori
  • Patent number: 9377081
    Abstract: Adjacent chain elements transmit a tension by allowing two pins to contact each other. When a chain which has been in a linear state starts to bend, a contact point moves from one point to another. Such movement of the contact point generates a force couple. This force couple causes the rear end of the chain element to move in a lifted manner. An increasing rate of this amount of movement with respect to a relative angle to an adjacent chain element is set such that the increasing rate is small when the relative angle is small, and becomes larger when the relative angle becomes larger.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: June 28, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Teruhiko Nakazawa, Shinji Yasuhara, Taizou Wakayama
  • Publication number: 20160178032
    Abstract: Three links within one width-direction unit are included in respectively different link units. The links in the first row and the sixth row from the right end and the left end of a chain are included in the same link unit. The links in the second row and the fifth row are included in the same link unit. The links in the ninth row and the tenth row are included in the same link unit other than the link unit in which the links in the second row and the fifth row are included. With the above structure, the stress amplitude of the links forming a chain for a chain-type continuously variable transmission can be reduced.
    Type: Application
    Filed: February 25, 2016
    Publication date: June 23, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Teruhiko NAKAZAWA, Ichiro TARUTANI, Yuji NAGASAWA, Shinji YAMANE, Keisuke MORI
  • Patent number: 9316287
    Abstract: A chain, wound to span between two pulleys each having facing conical surfaces able to change a distance therebetween and sandwiched by the facing conical surfaces, includes: link units each configured such that plate-shaped links, each having openings, are oriented in a chain circumferential direction and arranged in a chain width direction; and pins each extending through the openings of the links of the link units adjacent in the chain circumferential direction and each contacting the conical surfaces of sheaves at both ends thereof. A curvature radius of a shape curve representing a shape of each end face of each pin in a plane perpendicular to the chain circumferential direction is larger at an inner side in a pulley radial direction than at an initial contact point that is a contact point at the time when a load on each pin is 0.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: April 19, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Teruhiko Nakazawa, Ichiro Tarutani, Haruhiro Hattori, Yuji Nagasawa, Shinji Yamane, Keisuke Mori
  • Patent number: 9303724
    Abstract: Three links (40) within one width-direction unit (54) are included in respectively different link units (46). The links in the first row and the sixth row from the right end and the left end of a chain are included in the same link unit (first link unit 46-1). The links in the second row and the fifth row are included in the same link unit (second link unit 46-2). The links in the ninth row and the tenth row are included in the same link unit other than the link unit in which the links in the second row and the fifth row are included (first link unit 46-1 or third link unit 46-3). With the above structure, the stress amplitude of the links forming a chain for a chain-type continuously variable transmission can be reduced.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: April 5, 2016
    Assignee: JTEKT CORPORATION
    Inventors: Teruhiko Nakazawa, Ichiro Tarutani, Yuji Nagasawa, Shinji Yamane, Keisuke Mori
  • Publication number: 20160040761
    Abstract: When a chain is wound around a pulley, a pin-pulley contact point as a contact point of a pin of the chain with the pulley slides and moves on a conical surface of the pulley. A contact point slip distance, namely the distance by which the pin-pulley contact point moves on the conical surface at this time, is associated with an offset. The offset is the distance between a pin-pin contact point, which is a contact point between the pins at the time the chain is in a linear state, and the pin-pulley contact point in a y-axis direction. Offsets that minimize the contact point slip distance at the maximum running radius and the minimum running radius of the chain are obtained, and the offset is set between these values. The pin-pulley contact point is set close to the pin-pin contact point of the chain in the linear state.
    Type: Application
    Filed: July 29, 2015
    Publication date: February 11, 2016
    Applicant: JTEKT CORPORATION
    Inventors: Shinji YASUHARA, Taizou WAKAYAMA, Teruhiko NAKAZAWA
  • Patent number: 9163708
    Abstract: A chain (endless flexible member) is looped over an input pulley and an output pulley. Each of the input pulley and the output pulley includes a pair of a fixed sheave and a movable sheave. The fixed sheave and the movable sheave have tapered faces that are opposed to each other to define a V-shaped groove. A vibration damping plate (vibration damping member) is fixed to each fixed sheave, and is in contact with the outer peripheral face of the fixed sheave. When the fixed sheave vibrates, the vibrations are damped by the friction between the outer peripheral face of the fixed shave and the vibration damping plate.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: October 20, 2015
    Assignee: JTEKT CORPORATION
    Inventors: Shinji Yamane, Keisuke Mori, Teruhiko Nakazawa, Haruhiro Hattori
  • Publication number: 20140287854
    Abstract: A chain (endless flexible member) is looped over an input pulley and an output pulley. Each of the input pulley and the output pulley includes a pair of a fixed sheave and a movable sheave. The fixed sheave and the movable sheave have tapered faces that are opposed to each other to define a V-shaped groove. A vibration damping plate (vibration damping member) is fixed to each fixed sheave, and is in contact with the outer peripheral face of the fixed sheave. When the fixed sheave vibrates, the vibrations are damped by the friction between the outer peripheral face of the fixed shave and the vibration damping plate.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 25, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Shinji YAMANE, Keisuke MORI, Teruhiko NAKAZAWA, Haruhiro HATTORI
  • Publication number: 20140066243
    Abstract: A chain, wound to span between two pulleys each having facing conical surfaces able to change a distance therebetween and sandwiched by the facing conical surfaces, includes: link units each configured such that plate-shaped links, each having openings, are oriented in a chain circumferential direction and arranged in a chain width direction; and pins each extending through the openings of the links of the link units adjacent in the chain circumferential direction and each contacting the conical surfaces of sheaves at both ends thereof. A curvature radius of a shape curve representing a shape of each end face of each pin in a plane perpendicular to the chain circumferential direction is larger at an inner side in a pulley radial direction than at an initial contact point that is a contact point at the time when a load on each pin is 0.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 6, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Teruhiko NAKAZAWA, Ichiro TARUTANI, Haruhiro HATTORI, Yuji NAGASAWA, Shinji YAMANE, Keisuke MORI
  • Publication number: 20140045633
    Abstract: Adjacent chain elements transmit a tension by allowing two pins to contact each other. When a chain which has been in a linear state starts to bend, a contact point moves from one point to another. Such movement of the contact point generates a force couple. This force couple causes the rear end of the chain element to move in a lifted manner. An increasing rate of this amount of movement with respect to a relative angle to an adjacent chain element is set such that the increasing rate is small when the relative angle is small, and becomes larger when the relative angle becomes larger.
    Type: Application
    Filed: August 2, 2013
    Publication date: February 13, 2014
    Applicant: JTEKT CORPORATION
    Inventors: Teruhiko NAKAZAWA, Shinji YASUHARA, Taizou WAKAYAMA