Patents by Inventor Takuro IWASE

Takuro IWASE 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: 11186284
    Abstract: A control device performs upshifting in a state in which an operating point of a rotating electrical machine for outputting requirement-based torque at wheel-based rotational speed falls within an operable range of the rotating electrical machine both before and after shifting a shift speed by the upshifting, and in which before shifting the shift speed, output torque from the rotating electrical machine is less than or equal to determination torque (T1), the wheel-based rotational speed being rotational speed of the rotating electrical machine based on rotational speed (V) of a wheel, the requirement-based torque being output torque from the rotating electrical machine based on required wheel transmission torque, and the determination torque (T1) being torque obtained by subtracting an amount of increased torque (?Tmg) resulting from torque increase control from maximum torque (Tmax) that can be outputted from the rotating electrical machine at the wheel-based rotational speed.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: November 30, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Ryo Watanabe, Yasuyuki Sato, Kenta Kimata, Takuro Iwase, Junichiro Ohtsubo
  • Publication number: 20210313859
    Abstract: An air chamber serving as a breather chamber and a breather hole that communicates the outside of a case and the air chamber can be easily molded, and breather hole is provided so as to have a degree of freedom in an installation position and volume, so that oil does not easily blow out from case in which rotary electric machine is housed. Case housing rotary electric machine has an inner and outer case portion. Inner case portion has a first coupling portion. Outer case portion has a second coupling portion. The first and second coupling portions are fixed to each other. An air chamber communicated with an inside of inner case portion is formed between outer surface of inner case portion and inner surface of outer case portion. A breather hole that communicates air chamber and an outside of case is formed in outer case portion.
    Type: Application
    Filed: December 25, 2019
    Publication date: October 7, 2021
    Applicant: AISIN AW CO., LTD.
    Inventors: Takeshi TORII, Takuro IWASE, So SHIRAIWA
  • Publication number: 20210237740
    Abstract: A control device performs upshifting in a state in which an operating point of a rotating electrical machine for outputting requirement-based torque at wheel-based rotational speed falls within an operable range of the rotating electrical machine both before and after shifting a shift speed by the upshifting, and in which before shifting the shift speed, output torque from the rotating electrical machine is less than or equal to determination torque (T1), the wheel-based rotational speed being rotational speed of the rotating electrical machine based on rotational speed (V) of a wheel, the requirement-based torque being output torque from the rotating electrical machine based on required wheel transmission torque, and the determination torque (T1) being torque obtained by subtracting an amount of increased torque (?Tmg) resulting from torque increase control from maximum torque (Tmax) that can be outputted from the rotating electrical machine at the wheel-based rotational speed.
    Type: Application
    Filed: July 19, 2019
    Publication date: August 5, 2021
    Applicant: AISIN AW CO., LTD.
    Inventors: Ryo WATANABE, Yasuyuki SATO, Kenta KIMATA, Takuro IWASE, Junichiro OHTSUBO
  • Patent number: 11028906
    Abstract: A vehicle drive system including: a rotating electric machine; an output drivingly coupled to a wheel; a differential gear device provided in a power transmission path between the rotating electric machine and the output, the differential gear device including at least a first rotating element drivingly coupled to the rotating electric machine, a second rotating element drivingly coupled to the output, and a third rotating element that is selectively fixed by a one-way clutch to a non-rotating member and that is selectively fixed by a friction brake to the non-rotating member; and a clutch that selectively couples together two of the first rotating element, the second rotating element, and the third rotating element.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: June 8, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Takeshi Torii, Hiroshi Kato, Takuro Iwase, Keisuke Nakashima, Daisuke Yamaoka
  • Patent number: 10978983
    Abstract: A rotary electric machine control device that performs drive control on an AC rotary electric machine using an inverter that converts power between DC power and AC power through pulse width modulation based on a carrier frequency, the rotary electric machine control device including: an electronic control unit that is configured to vary the carrier frequency such that the carrier frequency becomes higher as a rotational speed of the rotary electric machine becomes higher so that carrier sideband frequencies, which are frequencies of sideband waves that appear on higher and lower sides of a center frequency that is set in accordance with the carrier frequency, are not included in a frequency band prescribed in advance.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: April 13, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Masayuki Takenaka, Takuro Iwase, Akiya Kume, Shoji Nagata, Yasuyuki Sato
  • Publication number: 20210091629
    Abstract: When a case of a rotary electric machine has an inner case member that houses a stator and an outer case member that houses the inner case member, a vibration that is transmitted from stator to the outer case member via inner case member is suppressed. The inner case portion is provided with a first tubular portion and a first protruding portion that protrudes toward a radial inner side from the first tubular portion on an axial first side. The outer case portion is provided with a second tubular portion and a second protruding portion that protrudes toward the radial inner side from the second tubular portion on the axial first side with respect to the first protruding portion. A coolant flow path is formed between the first tubular portion and the second tubular portion, and the first protruding portion and the second protruding portion are fixed to each other.
    Type: Application
    Filed: June 5, 2019
    Publication date: March 25, 2021
    Applicant: AISIN AW CO., LTD.
    Inventors: Takuro IWASE, Masaomi ASANO, Daisuke YAMAOKA, Takeshi TORII, Hiroaki SANJI, Jun SUZUKI, Isao FUJISHIMA, Keisuke NAKASHIMA
  • Publication number: 20210003196
    Abstract: An oil supply device has: a first hydraulic pump driven by power transmitted through a power transmission path; a second hydraulic pump driven by a second driving force source independent from the power transmission path; a first supply oil passage that supplies oil discharged by the first hydraulic pump to a lubrication required part of a transmission; and a second supply oil passage that supplies oil discharged by the second hydraulic pump to a hydraulic drive portion of a specific engagement device.
    Type: Application
    Filed: April 25, 2019
    Publication date: January 7, 2021
    Applicant: AISIN AW CO., LTD.
    Inventors: Naoki SAITO, Aito IDE, Takeshi TORII, Takuro IWASE
  • Publication number: 20200295696
    Abstract: A rotary electric machine control device that performs drive control on an AC rotary electric machine using an inverter that converts power between DC power and AC power through pulse width modulation based on a carrier frequency, the rotary electric machine control device including: an electronic control unit that is configured to vary the carrier frequency such that the carrier frequency becomes higher as a rotational speed of the rotary electric machine becomes higher so that carrier sideband frequencies, which are frequencies of sideband waves that appear on higher and lower sides of a center frequency that is set in accordance with the carrier frequency, are not included in a frequency band prescribed in advance.
    Type: Application
    Filed: March 27, 2018
    Publication date: September 17, 2020
    Applicant: AISIN AW CO., LTD.
    Inventors: Masayuki TAKENAKA, Takuro IWASE, Akiya KUME, Shoji NAGATA, Yasuyuki SATO
  • Publication number: 20200278011
    Abstract: A vehicle drive system including: a rotating electric machine; an output drivingly coupled to a wheel; a differential gear device provided in a power transmission path between the rotating electric machine and the output, the differential gear device including at least a first rotating element drivingly coupled to the rotating electric machine, a second rotating element drivingly coupled to the output, and a third rotating element that is selectively fixed by a one-way clutch to a non-rotating member and that is selectively fixed by a friction brake to the non-rotating member; and a clutch that selectively couples together two of the first rotating element, the second rotating element, and the third rotating element.
    Type: Application
    Filed: November 14, 2018
    Publication date: September 3, 2020
    Applicant: AISIN AW CO., LTD.
    Inventors: Takeshi TORII, Hiroshi KATO, Takuro IWASE, Keisuke NAKASHIMA, Daisuke YAMAOKA
  • Patent number: 8920148
    Abstract: An oil pump having an inner rotor with of external teeth; an outer rotor that is eccentrically provided and has internal teeth that mesh with the inner rotor external teeth, and an oil pump body that accommodates the outer and inner rotors. By rotationally driving the inner rotor to increase and decrease a space between the internal and the external teeth, an intake stroke suctions hydraulic oil from the oil pump body and a discharge stroke discharges the suctioned hydraulic oil to a discharge port formed in the oil pump body. Between the intake and discharge strokes, a confinement stroke cuts off the suctioned hydraulic oil and confines the suctioned hydraulic oil in the space, and a compression stroke reduces the space and compresses the confined hydraulic oil. Further, an interval is set between a finish end portion of the intake port of the oil pump body and a start end portion of the discharge port such that a rotation angle of the inner rotor during the compression stroke is 21 to 27 degrees.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: December 30, 2014
    Assignees: Aisin AW Co., Ltd., Toyooki Kogyo Co., Ltd.
    Inventors: Masateru Nakagawa, Nobukazu Ike, Takuro Iwase, Tomohiro Umemura, Noriyasu Ariga, Katsunori Ishikawa, Masashi Narita
  • Patent number: 8708120
    Abstract: A multi-plate clutch including a clutch hub having a cylindrical portion; a plurality of clutch plates splined to the outer periphery of the cylindrical portion of the clutch hub, and a plurality of spline teeth being formed on the outer periphery of the cylindrical portion of the clutch hub. A recessed portion is formed on the inner side of each spline tooth, and a weir portion is formed at one end of each recessed portion by depressing one portion of the spline tooth to the inner side on one end side of the cylindrical portion. Thus forming a depressed portion, and removing, with one portion of the depressed portion left behind, a portion of the cylindrical portion on the one end side of the one portion of the depressed portion.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: April 29, 2014
    Assignee: Aisin AW Co., Ltd.
    Inventors: Takeshi Torii, Takuro Iwase
  • Publication number: 20120080284
    Abstract: A multi-plate clutch including a clutch hub having a cylindrical portion; a plurality of clutch plates splined to the outer periphery of the cylindrical portion of the clutch hub, and a plurality of spline teeth being formed on the outer periphery of the cylindrical portion of the clutch hub. A recessed portion is formed on the inner side of each spline tooth, and a weir portion is formed at one end of each recessed portion by depressing one portion of the spline tooth to the inner side on one end side of the cylindrical portion. Thus forming a depressed portion, and removing, with one portion of the depressed portion left behind, a portion of the cylindrical portion on the one end side of the one portion of the depressed portion.
    Type: Application
    Filed: September 16, 2011
    Publication date: April 5, 2012
    Applicant: AISIN AW CO., LTD.
    Inventors: Takeshi TORII, Takuro IWASE
  • Publication number: 20110194968
    Abstract: An oil pump having an inner rotor with of external teeth; an outer rotor that is eccentrically provided and has internal teeth that mesh with the inner rotor external teeth, and an oil pump body that accommodates the outer and inner rotors. By rotationally driving the inner rotor to increase and decrease a space between the internal and the external teeth, an intake stroke suctions hydraulic oil from the oil pump body and a discharge stroke discharges the suctioned hydraulic oil to a discharge port formed in the oil pump body. Between the intake and discharge strokes, a confinement stroke cuts off the suctioned hydraulic oil and confines the suctioned hydraulic oil in the space, and a compression stroke reduces the space and compresses the confined hydraulic oil. Further, an interval is set between a finish end portion of the intake port of the oil pump body and a start end portion of the discharge port such that a rotation angle of the inner rotor during the compression stroke is 21 to 27 degrees.
    Type: Application
    Filed: January 26, 2011
    Publication date: August 11, 2011
    Applicants: AISIN AW CO., LTD., TOYOOKI KOGYO CO., LTD.
    Inventors: Masateru NAKAGAWA, Nobukazu IKE, Takuro IWASE, Tomohiro UMEMURA, Noriyasu ARIGA, Katsunori ISHIKAWA, Masashi NARITA