Patents by Inventor Takahiro Shiina

Takahiro Shiina 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: 9150092
    Abstract: A drive unit for a vehicle includes: an engine (2); a compound motor (3) having a first rotor and a second rotor that are differentially rotatable with each other; and an automatic transmission (4A) that delivers power output of the engine (2), which is input via the compound motor (3), to an output shaft (33), in which the first rotor is connected to an input side of a gear pair that corresponds to an even shift speed and the second rotor is connected to an input side of a gear pair that corresponds to an odd shift speed.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: October 6, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akira Murakami, Takahiro Shiina, Tadashi Fujiyoshi, Takao Watanabe, Eiji Tsuchiya
  • Patent number: 8992376
    Abstract: A power transmission device includes first and second rings arranged opposite each other, having a common rotation center axis, and rotatable relative to each other; a plurality of planetary balls having rotation center axes parallel to the rotation center axis, and radially arranged between the first and second rings and around the rotation center axis; a transmission control unit configured to change a rotation ratio between the first and second rings by changing the respective contact points of the first and second rings and each of the planetary balls through tilting motion of each of the planetary balls; and a rotation restricting unit disposed between the planetary balls adjacent to each other.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: March 31, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyuki Ogawa, Akira Murakami, Daisuke Tomomatsu, Takahiro Shiina
  • Patent number: 8961363
    Abstract: Provided with first and second rotational members, a sun roller, a plurality of planetary balls sandwiched between the first and second rotational members, a support shaft of each of the planetary balls, a shaft, a carrier, an iris plate and a worm gear for tilting each of the planetary balls, and an input shaft and an output shaft individually fixed to the first and second rotational members, respectively, in which a movable amount of the sun roller relative to the carrier in an axis line direction is set to be smaller than the movable amount of the second rotational member relative to the carrier in the axis line direction when the input shaft is arranged so as to be relatively rotatable on an outer peripheral surface of the output shaft.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: February 24, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Shiina, Akira Murakami, Hiroyuki Ogawa, Daisuke Tomomatsu, Yuki Aratsu
  • Publication number: 20150014073
    Abstract: A drive unit for a vehicle includes: an engine (2); a compound motor (3) having a first rotor and a second rotor that are differentially rotatable with each other; and an automatic transmission (4A) that delivers power output of the engine (2), which is input via the compound motor (3), to an output shaft (33), in which the first rotor is connected to an input side of a gear pair that corresponds to an even shift speed and the second rotor is connected to an input side of a gear pair that corresponds to an odd shift speed.
    Type: Application
    Filed: February 13, 2013
    Publication date: January 15, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akira Murakami, Takahiro Shiina, Tadashi Fujiyoshi, Takao Watanabe, Eiji Tsuchiya
  • Publication number: 20140365055
    Abstract: In a power generation control apparatus applied to a hybrid vehicle including a compound motor in which a wound rotor is connected to an internal combustion engine and a magnet rotor is connected to a transmission, when regenerative power generation is underway and the internal combustion engine is operative, a first motor/generator constituted by the wound rotor and the magnet rotor and the internal combustion engine are controlled such that torque output from the internal combustion engine is increased by torque applied to the internal combustion engine from the first motor/generator, and a power generation amount of a second motor/generator constituted by the magnet rotor and a stator is increased such that torque transmitted to an output shaft from the internal combustion engine is not applied to a drive wheel.
    Type: Application
    Filed: June 4, 2012
    Publication date: December 11, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi Fujiyoshi, Takahiro Shiina, Akira Murakami, Tatsuya Miyano, Takao Watanabe, Ryoichi Hibino
  • Patent number: 8862298
    Abstract: In a drive control device of a hybrid vehicle including a power dividing mechanism which has a sun roller, a carrier, and a first disc with which a rotating shaft of a first motor/generator, an output shaft of an engine, and a rotating shaft of a second motor/generator which also functions as an output shaft directed toward drive wheel sides are coupled, respectively and by which differential rotating operations between the sun roller, the carrier, and the first disc are controlled using an alignment chart on which rotation speeds of the sun roller, the carrier, and the first disc are disposed in the sequence of the sun roller, the carrier, the first disc and shown by straight lines.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: October 14, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Murakami, Hiroyuki Ogawa, Takahiro Shiina, Daisuke Tomomatsu
  • Patent number: 8784260
    Abstract: A continuously variable transmission having a continuously variable transmission mechanism including an input member, an output member, and a rotary member sandwiched therebetween, transmitting torque between the input member and the output member by means of frictional forces generated by pushing the input member and the output member against the rotary member, and continuously varying a transmission gear ratio between the input member and the output member, an axial force generating portion which rotates in one direction to generate a first axial force for pushing one of the input member and the output member toward the other and rotates in the other direction to generate a second axial force opposite to the first force, and an opposite axial force transmitting portion for transmitting the second force to the other of the input member and the output member when the axial force generating portion generates the second force.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: July 22, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Shiina, Akira Murakami, Hiroyuki Ogawa, Daisuke Tomomatsu
  • Patent number: 8784248
    Abstract: In an engine start control device of a hybrid vehicle including a power dividing mechanism which has a sun roller, a carrier, and a first disc with which a rotating shaft of a first motor/generator, an output shaft of an engine, and an output shaft of a second motor/generator are coupled, respectively and by which differential rotating operations between the sun roller, the carrier, and the first disc are controlled using an alignment chart on which rotation speeds of the sun roller, the carrier, and the first disc are disposed in the sequence of the sun roller, the carrier, the first disc and shown by straight lines.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: July 22, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Murakami, Hiroyuki Ogawa, Takahiro Shiina, Daisuke Tomomatsu
  • Publication number: 20140197716
    Abstract: Provided is a compound motor (14) comprising a magnet rotor (19) supported by bearings (B3, B4) in a rotatable manner, a winding rotor (20) supported by bearings (B5, B6) in a rotatable manner relative to the magnet rotor (19) at the inner side of the magnet rotor (19) and having rotor winding units (20b), and slip ring mechanisms (25). A space is formed in the inner circumference of the winding rotor (20). At least a part of the slip ring mechanisms (25) is arranged in the space of the inner circumference of the winding rotor (20). The bearings (B3 to B6) include bearings (B3, B6), the internal diameter of each is larger than the size of slip ring mechanisms (25) with respect to the radial direction. The bearings (B3, B6) are arranged outside the slip ring mechanisms (25) with respect to the radial direction.
    Type: Application
    Filed: August 6, 2012
    Publication date: July 17, 2014
    Inventors: Takahiro Shiina, Akira Murakami, Tadashi Fujiyoshi, Yasumitsu Osada, Takao Watanabe, Shu Asami, Eiji Tsuchiya, Tomoyuki Tohyama
  • Publication number: 20140094339
    Abstract: A continuously variable transmission includes a plurality of planetary balls interposed between a first and second rotating elements on a shaft, an iris plate and a worm gear that tilt the planetary balls, a sun roller that includes a first sun roller that includes a first tubular section having first contact points with the planetary balls and a second tubular section having a smaller outer diameter than the first tubular section and is capable of relative rotation with respect to the shaft and a second sun roller that includes second contact points with the planetary balls and is capable of relative rotation with respect to the first sun roller on an outer peripheral surface of the second tubular section, and thrust bearings that are arranged between the first sun roller and the second sun roller and bear thrust loads transmitted from the planetary balls to the first sun roller and the second sun roller.
    Type: Application
    Filed: June 10, 2011
    Publication date: April 3, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Ogawa, Daisuke Tomomatsu, Akira Murakami, Takahiro Shiina, Yuki Aratsu
  • Publication number: 20140011629
    Abstract: Provided with first and second rotational members, a sun roller, a plurality of planetary balls sandwiched between the first and second rotational members, a support shaft of each of the planetary balls, a shaft, a carrier, an iris plate and a worm gear for tilting each of the planetary balls, and an input shaft and an output shaft individually fixed to the first and second rotational members, respectively, in which a movable amount of the sun roller relative to the carrier in an axis line direction is set to be smaller than the movable amount of the second rotational member relative to the carrier in the axis line direction when the input shaft is arranged so as to be relatively rotatable on an outer peripheral surface of the output shaft.
    Type: Application
    Filed: March 29, 2011
    Publication date: January 9, 2014
    Inventors: Takahiro Shiina, Akira Murakami, Hiroyuki Ogawa, Daisuke Tomomatsu, Yuki Aratsu
  • Patent number: 8613684
    Abstract: A continuously variable transmission includes: first and second rotating elements that has a common first rotation axis; a planetary ball that is rotatably supported by a support shaft having a second rotation axis separate from the first rotation axis, and is sandwiched between the first rotation member and the second rotating member such that torque transmission is possible between them; grooves, etc., that permit change in a rotation ratio between the first and second rotating members by tilting and rolling the planetary ball; an inclined surface that pushes the support shaft in a direction opposite to the direction of tilt of the support shaft in accordance with spin moment occurring at the planetary ball when moving in an axial direction; and a thrust force transmitting section, such as a movable shaft, etc., by which radial thrust force applied from the planetary ball is transmitted to the inclined surface based on spin moment occurring at the planetary ball.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: December 24, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Shiina, Akira Murakami, Hiroyuki Ogawa, Daisuke Tomomatsu
  • Patent number: 8527812
    Abstract: The invented device includes a central processing unit(s), each CPU including an execution unit coupled to an operand bus and a control unit that controls operation of the execution unit, based on fetched instructions, and a debugging circuit that obtains trace data about how a program is executed in each CPU. The control unit includes a debugging function unit that collects instruction execution analysis data in the CPU. The debugging circuit includes a trace acquisition circuit(s) that imports instruction execution analysis data collected by the debugging function unit and data received from the operand bus via logic circuits used for separate purposes and a trace output circuit(s) for delivering outside the output of the trace acquisition circuit. In the trace acquisition circuit, a sorting logic unit is provided that sorts instruction execution analysis data collected by the debugging function unit and data received from the operand bus.
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: September 3, 2013
    Assignee: Renesas Electronics Corporation
    Inventor: Takahiro Shiina
  • Patent number: 8382636
    Abstract: A continuously variable transmission having a continuously variable transmission mechanism for transmitting torque between an input side and an output side by means of frictional forces generated by pushing the input disc and the output disc against the planetary balls and continuously varying a transmission gear ratio between the input side and the output side includes a second group of helical gears capable of generating a first axial force for pushing the input disc toward the output disc, a first group of helical gears capable of generating a second axial force for pushing the output disc toward the input disc, and a thrust bearing and a central shaft for transmitting, when an opposite force in such a direction as to move the input disc away from the output disc and opposite force to the first force is generated on a side of the input disc, the opposite force to the output disc.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: February 26, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takahiro Shiina, Akira Murakami, Hiroyuki Ogawa, Daisuke Tomomatsu
  • Publication number: 20130019712
    Abstract: In an engine start control device of a hybrid vehicle including a power dividing mechanism which has a sun roller, a carrier, and a first disc with which a rotating shaft of a first motor/generator, an output shaft of an engine, and an output shaft of a second motor/generator are coupled, respectively and by which differential rotating operations between the sun roller, the carrier, and the first disc are controlled using an alignment chart on which rotation speeds of the sun roller, the carrier, and the first disc are disposed in the sequence of the sun roller, the carrier, the first disc and shown by straight lines.
    Type: Application
    Filed: March 30, 2010
    Publication date: January 24, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akira Murakami, Hiroyuki Ogawa, Takahiro Shiina, Daisuke Tomomatsu
  • Publication number: 20130024062
    Abstract: In a drive control device of a hybrid vehicle including a power dividing mechanism which has a sun roller, a carrier, and a first disc with which a rotating shaft of a first motor/generator, an output shaft of an engine, and a rotating shaft of a second motor/generator which also functions as an output shaft directed toward drive wheel sides are coupled, respectively and by which differential rotating operations between the sun roller, the carrier, and the first disc are controlled using an alignment chart on which rotation speeds of the sun roller, the carrier, and the first disc are disposed in the sequence of the sun roller, the carrier, the first disc and shown by straight lines.
    Type: Application
    Filed: March 30, 2010
    Publication date: January 24, 2013
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Murakami, Hiroyuki Ogawa, Takahiro Shiina, Daisuke Tomomatsu
  • Publication number: 20120322609
    Abstract: A power transmission device includes first and second rings arranged opposite each other, having a common rotation center axis, and rotatable relative to each other; a plurality of planetary balls having rotation center axes parallel to the rotation center axis, and radially arranged between the first and second rings and around the rotation center axis; a transmission control unit configured to change a rotation ratio between the first and second rings by changing the respective contact points of the first and second rings and each of the planetary balls through tilting motion of each of the planetary balls; and a rotation restricting unit disposed between the planetary balls adjacent to each other.
    Type: Application
    Filed: February 22, 2010
    Publication date: December 20, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroyuki Ogawa, Akira Murakami, Daisuke Tomomatsu, Takahiro Shiina
  • Publication number: 20120244991
    Abstract: A continuously variable transmission having a continuously variable transmission mechanism including an input member, an output member, and a rotary member sandwiched therebetween, transmitting torque between the input member and the output member by means of frictional forces generated by pushing the input member and the output member against the rotary member, and continuously varying a transmission gear ratio between the input member and the output member, an axial force generating portion which rotates in one direction to generate a first axial force for pushing one of the input member and the output member toward the other and rotates in the other direction to generate a second axial force opposite to the first force, and an opposite axial force transmitting portion for transmitting the second force to the other of the input member and the output member when the axial force generating portion generates the second force.
    Type: Application
    Filed: December 2, 2009
    Publication date: September 27, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Shiina, Akira Murakami, Hiroyuki Ogawa, Daisuke Tomomatsu
  • Publication number: 20120231925
    Abstract: A continuously variable tranmission having a continuously variable transmission mechanism for transmitting torque between an input side and an output side by means of frictional forces generated by pushing the input disc and the output disc against the planetary balls and continuously varying a transmission gear ratio between the input side and the output side includes a second group of helical gears capable of generating a first axial force for pushing the input disc toward the output disc a first group of helical gears capable of generating a second axial force for pushing the output disc toward the input disc, and a thrust bearing and a central shaft for transmitting, when an opposite force in such a direction as to move the input disc away from the output disc and opposite force to the first force is generated on a side of the input disc, the opposite force to the output disc.
    Type: Application
    Filed: December 2, 2009
    Publication date: September 13, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Shiina, Akira Murakami, Hiroyuki Ogawa, Daisuke Tomomatsu
  • Patent number: 8251848
    Abstract: A vehicle transmission includes at least two driving shafts to which power is transmitted from a power source, a driven shaft to which power is transmitted from the driving shafts, drive transmission mechanisms disposed between the driving shafts and the driven shaft, and a switching mechanism that selectively enables power transmission via the drive transmission mechanisms. The driving shafts are disposed concentrically and fitted rotatably relative to each other. The driving shafts are parallel to the driven shaft. A first drive unit is disposed coaxially with the driving shafts. A second drive unit is disposed coaxially with the driven shaft. The first and second drive units are interconnected so as to send and receive powers changed in energy form to and from each other. The transmission thus constructed is excellent in power transmission efficiency, quietness, vehicle mountability, etc., and can realize continuously variable speed change.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: August 28, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Murakami, Makoto Funahashi, Takahiro Shiina