Patents by Inventor Yoichi OI
Yoichi OI 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).
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Patent number: 11919504Abstract: A motor control device according to an embodiment includes a hardware processor configured to: calculate a first torsion torque generated by a motor shaft according to fluctuation of an engine torque based on a difference between a motor angle as a rotation angle of the motor shaft and a shaft angle as a rotation angle of a transmission shaft of a transmission on the downstream side of a damper; calculate a first vibration damping torque to be output by a motor generator to damp vibration of the motor shaft based on the first torsion torque and a drive state value indicating a drive state of an engine; and output a motor torque command value to be provided to the motor generator based on the first vibration damping torque.Type: GrantFiled: December 13, 2019Date of Patent: March 5, 2024Assignee: AISIN CORPORATIONInventors: Hirotaka Mizuguchi, Satoshi Kokubo, Yoichi Oi, Tomoki Inagaki
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Patent number: 11781618Abstract: A damper device includes an input element; an intermediate element; art output element; a first elastic body that transmits a torque between the input element and the intermediate element; and a second elastic body that transmits a torque between the intermediate element and the output element. The damper device also includes a rotary inertia mass damper that includes a first mass body rotating in accordance with relative rotation between the input element and the output element and that is arranged between the input element and the output element to be parallel to a torque transmission path including the first elastic body, the intermediate element and the second elastic body. Finally, the damper devices includes a second mass body; and an elastic body arranged to couple the second mass body with the output element.Type: GrantFiled: September 13, 2017Date of Patent: October 10, 2023Assignees: AISIN AW INDUSTRIES CO., LTD, AISIN CORPORATIONInventors: Takuya Yoshikawa, Aki Ogawa, Ryosuke Otsuka, Akiyoshi Kato, Yoichi Oi, Masaki Wajima
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Publication number: 20230296152Abstract: A damper spring having an excellent fatigue limit is provided. A damper spring according to the present embodiment includes a nitrided layer formed in an outer layer, and a core portion that is further inward than the nitrided layer. The chemical composition of the core portion consists of, in mass%, C: 0.53 to 0.59%, Si: 2.51 to 2.90%, Mn: 0.70 to 0.85%, P: 0.020% or less, 5: 0.020% or less, Cr: 1.40 to 1.70%, Mo: 0.17 to 0.53%, V: 0.23 to 0.33%, Cu: 0.050% or less, Ni: 0.050% or less, Al: 0.0050% or less, Ti: 0.050% or less, N: 0.0070% or less, and Nb: 0 to 0.020%, with the balance being Fe and impurities. In the core portion, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 500 to 8000 pieces/?m2.Type: ApplicationFiled: October 15, 2020Publication date: September 21, 2023Inventors: Shinya TERAMOTO, Yutaka NEISHI, Michimasa AONO, Shuji KOZAWA, Yoichi OI, Naoki TAKABAYASHI, Junji TANAKA, Fumio TAKAHASHI, Shigekazu NISHIMOTO, Mitsuhiro KONDO, Tatsuro OCHI, Shoichi SUZUKI
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Patent number: 11668369Abstract: A vibration damping device including a supporting member rotating with a rotation element around a rotation center of the rotation element; a restoring force generation member coupled to the supporting member to transfer torque to and from the supporting member and configured to swing with rotation of the supporting member; and an inertia mass body coupled to the supporting member via the restoring force generation member and swinging around the rotation center with the restoring force generation member with rotation of the supporting member, in which the restoring force generation member swings around a swing center so that a relative position with respect to the inertia mass body does not change, and a distance between a center of gravity of the restoring force generation member and the swing center changes with a change in a swing angle of the restoring force generation member with respect to the inertia mass body.Type: GrantFiled: November 18, 2019Date of Patent: June 6, 2023Assignee: AISIN CORPORATIONInventors: Yoichi Oi, Takao Sakamoto, Takuya Fukuoka
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Patent number: 11619283Abstract: A damper device including an input element and an output element; an elastic body transmitting torque between the input element and the output element; and a rotary inertia mass damper having a mass body. The rotary inertia mass damper includes a sun gear, a carrier rotatably supporting pinion gears, and a ring gear that meshes with the pinion gears and serving as the mass body. A pair of washers is located on both sides of each pinion gear axially. The ring gear includes an annulus gear having internal teeth meshing with the pinion gears and a weight body fixed to the annulus gear such that the weight body is in contact with a side surface of the annulus gear. An inner circumferential surface of the weight body is supported in a radial direction by a tip of the pinion gear or an outer circumferential surface of the washer.Type: GrantFiled: November 14, 2018Date of Patent: April 4, 2023Assignees: AISIN CORPORATION, AISIN AW INDUSTRIES CO., LTD.Inventors: Takuya Yoshikawa, Tomonori Kinoshita, Tetsuro Taniguchi, Akiyoshi Kato, Yoichi Oi
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Patent number: 11585406Abstract: A damper device includes rotating elements including an input element and an output element, first elastic bodies that each transmit torque between the input element and the output element, a plurality of second elastic bodies that act in parallel with the plurality of first elastic bodies when torque transmitted between the input element and the output element is greater than or equal to a predetermined value, and a rotary inertia mass damper. The rotary inertia mass damper includes a sun gear, a carrier that rotatably supports a plurality of pinion gears, and a ring gear that meshes with the plurality of pinion gears and that serves as a mass body. The plurality of second elastic bodies are located at a different position than the plurality of first elastic bodies in a radial direction of the rotating elements and are circumferentially aligned with the plurality of pinion gears.Type: GrantFiled: November 14, 2018Date of Patent: February 21, 2023Assignee: AISIN CORPORATIONInventors: Takuya Yoshikawa, Tomonori Kinoshita, Tetsuro Taniguchi, Akiyoshi Kato, Yoichi Oi
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Patent number: 11512766Abstract: A vibration damping apparatus including a support member rotatable together with a rotational element, a restoration force generating member coupled to the support member to transmit and receive a torque with the support member, an inertial mass coupled to the support member via the restoration force generating member, a first guide surface on the restoration force generating member, a second guide surface on the inertial mass, and a coupling member having first and second rolling portions. The first and second guide surfaces are formed so that the first rolling portion rolls along the first guide surface and the second rolling portion rolls along the second guide surface along with rotation of the support member causing the restoration force generating member to swing about a rotation center of the rotational element along a radial direction of the support member and causing the inertial mass to swing about the rotation center.Type: GrantFiled: September 28, 2018Date of Patent: November 29, 2022Assignee: AISIN CORPORATIONInventors: Kazuyoshi Ito, Yoichi Oi, Takao Sakamoto, Hiroki Nagai, Kazuhiro Itou
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Patent number: 11454297Abstract: A torsional vibration damper that damps torsional vibration effectively in a low-speed range. In the torsional vibration damper, a spring holder is formed by apertures of an input element and an output element, and an elastic member is held in the spring holder. A first moveable range of a planetary element extending from an initial position in a drive direction is wider than a second movable range of the planetary element extending from the initial position in a counter direction.Type: GrantFiled: February 12, 2020Date of Patent: September 27, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN FUKUI CORPORATIONInventors: Tomo Iwagaki, Hideyuki Nishida, Masayuki Ishibashi, Yoichi Oi, Yu Mizukami, Takuya Yoshikawa, Katsunori Tanaka, Tomoyuki Hiramoto
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Patent number: 11401995Abstract: A torsional vibration damper that a torsional vibration damper having a planetary gear unit, and a manufacturing method of the torsional vibration damper for limiting damages on gears of the planetary gear unit due to dimension errors. In the planetary gear unit, at least one of a sun gear, a ring gear, and a set of planetary gears is/are formed by a press forming method. The gear formed by the press forming method is engaged with the remaining gears in such a manner that a thinner portion of each tooth is individually engaged with a thicker portion of the adjacent teeth of the remaining gears.Type: GrantFiled: April 27, 2020Date of Patent: August 2, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN FUKUI CorporationInventors: Masayuki Ishibashi, Hideyuki Nishida, Yoichi Oi, Takuya Yoshikawa, Katsunori Tanaka, Tomoyuki Hiramoto
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Publication number: 20220055609Abstract: A motor control device according to an embodiment includes a hardware processor configured to: calculate a first torsion torque generated by a motor shaft according to fluctuation of an engine torque based on a difference between a motor angle as a rotation angle of the motor shaft and a shaft angle as a rotation angle of a transmission shaft of a transmission on the downstream side of a damper; calculate a first vibration damping torque to be output by a motor generator to damp vibration of the motor shaft based on the first torsion torque and a drive state value indicating a drive state of an engine; and output a motor torque command value to be provided to the motor generator based on the first vibration damping torque.Type: ApplicationFiled: December 13, 2019Publication date: February 24, 2022Applicant: AISIN CORPORATIONInventors: Hirotaka MIZUGUCHI, Satoshi KOKUBO, Yoichi OI, Tomoki INAGAKI
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Publication number: 20220042573Abstract: A damper device including an input element to which a torque from an engine is transmitted; an output element; an elastic body to transmit torque between the input element and the output element; and rotary inertia mass damper having a mass body that rotates in accordance with a relative rotation of the input element and the output element. The output element is coupled to a rotor of an electric motor, which is coupled to an input shaft of a transmission. The rotary inertia mass damper includes a planetary gear mechanism having a carrier that supports pinion gears, the carrier is a part of the input element, one of the sun gear and the ring gear is a part of the output element, and the other of the sun gear and the ring gear functions as the mass body.Type: ApplicationFiled: December 26, 2019Publication date: February 10, 2022Applicants: AISIN CORPORATION, AISIN AW INDUSTRIES CO., LTD.Inventors: Takuya YOSHIKAWA, Tomonori KINOSHITA, Akiyoshi KATO, Ryosuke OTSUKA, Yoichi OI, Yu MIZUKAMI, Aki OGAWA
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Patent number: 11204078Abstract: A vibration damping device includes a support member that rotates, together with a rotary element to which torque from an engine is transmitted, about a center of rotation of the rotary element, a restoring force generation member that is coupled to the support member to transmit torque to and receive torque from the support member and that is swingable along with rotation of the support member, and an inertial mass body that is coupled to the support member via the restoring force generation member and that swings about the center of rotation in conjunction with the restoring force generation member along with rotation of the support member. The support member is disposed between at least a part of the restoring force generation member and at least a part of the inertial mass body in an axial direction.Type: GrantFiled: August 9, 2018Date of Patent: December 21, 2021Assignee: AISIN AW CO., LTD.Inventors: Yoichi Oi, Takao Sakamoto, Kazuhiro Itou, Masahiko Kobayashi
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Publication number: 20210246965Abstract: A vibration damping device includes: a supporting member that rotates integrally with a rotation element, to which torque from an engine is transmitted, around a rotation center of the rotation element; a restoring force generation member that is coupled to the supporting member so as to transmit and receive torque to and from the supporting member and that is configured to swing in accordance with rotation of the supporting member; and an inertia mass body that is coupled to the supporting member via the restoring force generation member and that swings around the rotation center in conjunction with the restoring force generation member in accordance with rotation of the supporting member, in which the restoring force generation member swings around a swing center that is set so that a relative position with respect to the inertia mass body does not change, and a distance between a center of gravity of the restoring force generation member and the swing center changes in accordance with a change in a swing aType: ApplicationFiled: November 18, 2019Publication date: August 12, 2021Inventors: Yoichi OI, Takao SAKAMOTO, Takuya FUKUOKA
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Patent number: 10968977Abstract: A torsional vibration damper whose vibration damping performance will not be reduced in a high speed range. In the torsional vibration damper, a planetary gear is oscillated within a first oscillating range when a torsional torque is smaller than a reference torque, and within a second oscillating range when the torsional torque is greater than the reference torque. Each backlash between the pinion gear and at least one of a sun gear and a ring gear within the second oscillating range is individually wider than each backlash between the pinion gear and the sun gear and each backlash between the pinion gear and the ring gear within the first oscillating range.Type: GrantFiled: February 25, 2020Date of Patent: April 6, 2021Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD.Inventors: Masayuki Ishibashi, Hideyuki Nishida, Isamu Hachisuwa, Yoichi Oi, Takuya Yoshikawa, Ryosuke Otsuka, Katsunori Tanaka, Tomoyuki Hiramoto
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Publication number: 20210054914Abstract: A damper device includes a plurality of rotational elements including an input element and an output element; an elastic body that transmits a torque between the input and the output elements; and a rotary inertia mass damper with a mass body rotating in accordance with a relative rotation between a first rotational element which is one of the rotational elements and a second rotational element different from the first rotational element. The rotary inertia mass damper includes a sun gear that rotates integrally with the first rotational element, pinion gears rotatably supported by the second rotational element, and a ring gear that meshes with the pinion gears and works as the mass body. The second rotational element includes a plurality of ring gear supporting portions arranged at intervals in a circumferential direction so as to restrict a movement of the ring gear in an axial direction of the damper device.Type: ApplicationFiled: March 29, 2019Publication date: February 25, 2021Applicant: AISIN AW INDUSTRIES CO., LTD.Inventors: Makoto YAMAGUCHI, Hiroki TAKAYANAGI, Kouhei SHIMIZU, Akiyoshi KATO, Yoichi OI
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Publication number: 20200378448Abstract: A vibration damping device including a support member rotabable about the center of rotation of a rotary element; a restoring force generation member coupled to the support member; an inertial mass body coupled to the support member via the restoring force generation member; and a guided portion and a guide portion provided alternately on one of the restoring force generation member or the inertial mass body. The guide portion guides the guided portion so the restoring force generation member swings along the radial direction of the center of rotation and the inertial mass body swings about the center of rotation when the support member is rotated. A component of a centrifugal force acting on the restoring force generation member is transferred from the guided portion to the guide portion. The restoring force generation member includes two mass bodies facing each other and disposed on sides of the inertial mass body.Type: ApplicationFiled: April 27, 2018Publication date: December 3, 2020Applicant: AISIN AW CO., LTD.Inventors: Yoichi OI, Takao SAKAMOTO, Takuya FUKUOKA, Kazuhiro ITOU
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Publication number: 20200378489Abstract: A vibration damping device including a support member that rotates with a rotary element that receives engine torque; a restoring force generating member coupled to the support member and swingable with rotation of the support member; an inertial mass body that, with rotation of the support member, swings about the center of rotation in conjunction with the restoring force generating member; a guided portion formed in either the restoring force generating member and the inertial mass body; and a guide portion formed in the other of the restoring force generating member and the inertial mass body and configured to guide the guided portion. As the guided portion is guided by the guide portion, the restoring force generating member swings with respect to the center of rotation in the radial direction of the support member and the inertial mass body swings about the center of rotation when the support member rotates.Type: ApplicationFiled: April 27, 2018Publication date: December 3, 2020Applicant: AISIN AW CO., LTD.Inventors: Yoichi OI, Takao SAKAMOTO, Hiroki NAGAI
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Publication number: 20200355252Abstract: A torsional vibration damper that a torsional vibration damper having a planetary gear unit, and a manufacturing method of the torsional vibration damper for limiting damages on gears of the planetary gear unit due to dimension errors. In the planetary gear unit, at least one of a sun gear, a ring gear, and a set of planetary gears is/are formed by a press forming method. The gear formed by the press forming method is engaged with the remaining gears in such a manner that a thinner portion of each tooth is individually engaged with a thicker portion of the adjacent teeth of the remaining gears.Type: ApplicationFiled: April 27, 2020Publication date: November 12, 2020Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD.Inventors: Masayuki ISHIBASHI, Hideyuki NISHIDA, Yoichi OI, Takuya YOSHIKAWA, Katsunori TANAKA, Tomoyuki HIRAMOTO
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Publication number: 20200278008Abstract: A torsional vibration damper whose vibration damping performance will not be reduced in a high speed range. In the torsional vibration damper, a planetary gear is oscillated within a first oscillating range when a torsional torque is smaller than a reference torque, and within a second oscillating range when the torsional torque is greater than the reference torque. Each backlash between the pinion gear and at least one of a sun gear and a ring gear within the second oscillating range is individually wider than each backlash between the pinion gear and the sun gear and each backlash between the pinion gear and the ring gear within the first oscillating range.Type: ApplicationFiled: February 25, 2020Publication date: September 3, 2020Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTD.Inventors: Masayuki ISHIBASHI, Hideyuki NISHIDA, lsamu HACHISUWA, Yoichi OI, Takuya YOSHIKAWA, Ryosuke OTSUKA, Katsunori TANAKA, Tomoyuki HIRAMOTO
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Publication number: 20200263761Abstract: A damper device includes rotating elements including an input element and an output element, first elastic bodies that each transmit torque between the input element and the output element, a plurality of second elastic bodies that act in parallel with the plurality of first elastic bodies when torque transmitted between the input element and the output element is greater than or equal to a predetermined value, and a rotary inertia mass damper. The rotary inertia mass damper includes a sun gear, a carrier that rotatably supports a plurality of pinion gears, and a ring gear that meshes with the plurality of pinion gears and that serves as a mass body. The plurality of second elastic bodies are located at a different position than the plurality of first elastic bodies in a radial direction of the rotating elements and are circumferentially aligned with the plurality of pinion gears.Type: ApplicationFiled: November 14, 2018Publication date: August 20, 2020Applicants: AISIN AW CO., LTD., AISIN AW INDUSTRIES CO., LTDInventors: Takuya YOSHIKAWA, Tomonori KINOSHITA, Tetsuro TANIGUCHI, Akiyoshi KATO, Yoichi OI