Patents by Inventor Hiroki YASUI
Hiroki YASUI 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: 11454318Abstract: A shifting mechanism in which an inclination of a sleeve with respect to a shift fork is reduced while maintaining a clearance between the shift fork and the sleeve. In the shifting mechanism, an engagement groove is formed entirely around a shift sleeve, and a cutout is formed on the engagement groove. A first diameter of the shift sleeve between predetermined sites of the bottom of the engagement groove within the cutouts is shorter than a second diameter of the shift sleeve between predetermined sites of the bottom of the engagement groove. A straight-line distance between the engagement ridges formed on both ends of the shift fork is longer than the first diameter but shorter than the second diameter.Type: GrantFiled: November 8, 2021Date of Patent: September 27, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Shioiri, Yoichiro Isami, Kenta Kimura, Hiroaki Ebuchi, Hiroki Yasui
-
Publication number: 20220178441Abstract: A shifting mechanism in which an inclination of a sleeve with respect to a shift fork is reduced while maintaining a clearance between the shift fork and the sleeve. In the shifting mechanism, an engagement groove is formed entirely around a shift sleeve, and a cutout is formed on the engagement groove. A first diameter of the shift sleeve between predetermined sites of the bottom of the engagement groove within the cutouts is shorter than a second diameter of the shift sleeve between predetermined sites of the bottom of the engagement groove. A straight-line distance between the engagement ridges formed on both ends of the shift fork is longer than the first diameter but shorter than the second diameter.Type: ApplicationFiled: November 8, 2021Publication date: June 9, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki SHIOIRI, Yoichiro ISAMI, Kenta KIMURA, Hiroaki EBUCHI, Hiroki YASUI
-
Patent number: 11247657Abstract: A control system for a hybrid vehicle that shift an operating mode to an appropriate mode from a low mode or high mode. The hybrid vehicle comprises a power split mechanism connected to an engine and a first motor. When a required brake torque of a prime mover cannot be achieved during propulsion in an operating mode established by engaging one of clutches while stopping the engine, the control system excites a motoring of the engine by the first motor while maintaining engagement of the clutch engaged to establish the current operating mode.Type: GrantFiled: March 11, 2019Date of Patent: February 15, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yosuke Suzuki, Hideaki Komada, Hidekazu Nagai, Takahito Endo, Hirotsugu Yoshino, Hiroki Yasui
-
Patent number: 11242914Abstract: A power transmission unit that can prevent unintentional disengagement of a clutch. A first set of teeth formed on an outer circumferential surface of a first rotary member is engaged with a third set of teeth formed on an inner circumferential surface of a second rotary member. A second set of teeth formed on an inner circumferential surface of the first rotary member is meshed with a fourth set of teeth formed on an outer circumferential surface of a third rotary member. A center of engagement between the first set of teeth and the third set of teeth is situated at a point withdrawn from a center of engagement between the second set of teeth and the fourth set of teeth in the direction to disengage the first set of teeth from the third set of teeth.Type: GrantFiled: December 29, 2020Date of Patent: February 8, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki Ebuchi, Yoichiro Isami, Hirotsugu Yoshino, Hiroki Yasui
-
Patent number: 11209052Abstract: A meshing engagement device includes a movable member; a first engaging element; a spring member; first engaging teeth formed on the first engaging element; and a second engaging element having second engaging teeth which engage with the first engaging teeth. Further, the meshing engagement device switches between an engagement state and a disengagement state, and the engagement state includes: a first engagement state where the spring member is brought into a state where the spring member is contracted in the axial direction; and a second engagement state where the spring member is brought into a state where the spring member is further contracted in the axial direction compared to the spring member in the first engagement state.Type: GrantFiled: May 7, 2020Date of Patent: December 28, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hirotsugu Yoshino, Hiroki Yasui, Takahito Endo, Hiroaki Ebuchi
-
Patent number: 11162582Abstract: A control system for a power transmission unit configured to shift an operating mode smoothly by manipulating engagement devices, and to simplify a structure of the power transmission unit. The control system is configured to reduce a speed difference between an axially stationary engagement element and a reciprocatable engagement element of a second engagement device when shifting from a first continuously variable mode to a second continuously variable mode by engaging the second engagement device. After the second engagement device has been engaged completely, a first engagement device is disengaged.Type: GrantFiled: November 13, 2020Date of Patent: November 2, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tatsuya Imamura, Hiroaki Ebuchi, Hiroyuki Shioiri, Takahito Endo, Hidekazu Nagai, Yoichiro Isami, Hirotsugu Yoshino, Hiroki Yasui
-
Publication number: 20210222757Abstract: A power transmission unit that can prevent unintentional disengagement of a clutch. A first set of teeth formed on an outer circumferential surface of a first rotary member is engaged with a third set of teeth formed on an inner circumferential surface of a second rotary member. A second set of teeth formed on an inner circumferential surface of the first rotary member is meshed with a fourth set of teeth formed on an outer circumferential surface of a third rotary member. A center of engagement between the first set of teeth and the third set of teeth is situated at a point withdrawn from a center of engagement between the second set of teeth and the fourth set of teeth in the direction to disengage the first set of teeth from the third set of teeth.Type: ApplicationFiled: December 29, 2020Publication date: July 22, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki EBUCHI, Yoichiro ISAMI, Hirotsugu YOSHINO, Hiroki YASUI
-
Publication number: 20210172517Abstract: A control system for a power transmission unit configured to shift an operating mode smoothly by manipulating engagement devices, and to simplify a structure of the power transmission unit. The control system is configured to reduce a speed difference between an axially stationary engagement element and a reciprocatable engagement element of a second engagement device when shifting from a first continuously variable mode to a second continuously variable mode by engaging the second engagement device. After the second engagement device has been engaged completely, a first engagement device is disengaged.Type: ApplicationFiled: November 13, 2020Publication date: June 10, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tatsuya IMAMURA, Hiroaki EBUCHI, Hiroyuki SHIOIRI, Takahito ENDO, Hidekazu NAGAI, Yoichiro ISAMI, Hirotsugu YOSHINO, Hiroki YASUI
-
Patent number: 11027721Abstract: A control system for a vehicle that prevents an unintentional mode change when a command signal cannot be transmitted to an engagement device. In the vehicle, HV-Lo mode is established by connecting a carrier to a carrier by a first clutch while disconnecting the carrier from a ring gear by a second clutch, and HV-Lo mode is established by disconnecting the carrier from the carrier by the first clutch while connecting the carrier to the ring gear by the second clutch. A normally stay clutch is used as at least one of the first clutch and the second clutch.Type: GrantFiled: November 9, 2018Date of Patent: June 8, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tatsuya Imamura, Hideaki Komada, Akiko Nishimine, Yosuke Suzuki, Hidekazu Nagai, Takahito Endo, Hirotsugu Yoshino, Kensei Hata, Hiroki Yasui
-
Publication number: 20210123527Abstract: A shifting mechanism whose axial length is reduced without increasing a manufacturing cost. The shifting mechanism comprises: a cylindrical cam; a serpentine cam groove formed on the cam; a cam follower contacted to the guide section to be reciprocated in an axial direction; and a shift fork connected to the cam follower. The cam follower is pushed onto one of walls of a cam groove serving as a guide wall by a pushing member.Type: ApplicationFiled: May 7, 2020Publication date: April 29, 2021Inventors: Hirotsugu YOSHINO, Hiroaki EBUCHI, Takahito ENDO, Hiroki YASUI
-
Publication number: 20200355226Abstract: A meshing engagement device includes a movable member; a first engaging element; a spring member; first engaging teeth formed on the first engaging element; and a second engaging element having second engaging teeth which engage with the first engaging teeth. Further, the meshing engagement device switches between an engagement state and a disengagement state, and the engagement state includes: a first engagement state where the spring member is brought into a state where the spring member is contracted in the axial direction; and a second engagement state where the spring member is brought into a state where the spring member is further contracted in the axial direction compared to the spring member in the first engagement state.Type: ApplicationFiled: May 7, 2020Publication date: November 12, 2020Inventors: Hirotsugu YOSHINO, Hiroki YASUI, Takahito ENDO, Hiroaki EBUCHI
-
Patent number: 10563701Abstract: Described herein are various embodiments of a clutch assembly and separator plates for a clutch assembly. The clutch assembly may comprise a first separator plate; a second separator plate; and a spring coupled to the first separator plate and contacting the second separator plate, such that when compressed the spring applies a repulsive force separating the first separator plate and the second separator plate.Type: GrantFiled: February 20, 2017Date of Patent: February 18, 2020Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki KaishaInventors: Luke A. Rippelmeyer, Hiroki Yasui
-
Patent number: 10539196Abstract: A selectable one-way clutch includes: a shaft; an actuator configured to cause the shaft to perform a rectilinear motion in a shaft direction; and an arm including an operation portion configured to receive force in the shaft direction from the shaft. The shaft includes a first flange and a second flange. An engaged state and a released state the selectable one-way clutch are switched by an operation of the arm by the rectilinear motion of the shaft, in an assembled state of the shaft and the arm in which the operation portion is arranged between the first flange and the second flange. The first flange is provided with a cut portion in an outer peripheral edge of the first shaft. The shaft has a structure in which the first flange does not face the operation portion in the shaft direction by the cut portion of the first flange.Type: GrantFiled: March 22, 2017Date of Patent: January 21, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Yasui, Hiroyuki Shioiri, Hiroyuki Shibata, Yuki Kurosaki
-
Patent number: 10493840Abstract: A power transmission apparatus includes: an input shaft; a selectable one-way clutch; a housing case; a center support; a lubricating oil reservoir; and an oil passage. The oil passage extends through a pocket plate disposed between the lubricating oil reservoir and a selector plate. The selector plate includes a through-hole. The through-hole is located at a position where the through-hole is not lined up with the opening of the oil passage in a radial direction and a circumferential direction of the selector plate in a non-engagement state of the selectable one-way clutch, and also at a position where the through-hole is lined up with the opening of the oil passage in the radial direction and the circumferential direction of the selector plate in an engagement state of the selectable one-way clutch.Type: GrantFiled: September 6, 2016Date of Patent: December 3, 2019Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, MEANS INDUSTRIES, INC.Inventors: Yuki Kurosaki, Hiroyuki Shioiri, Hiroyuki Shibata, Hiroki Yasui, Joshua D. Hand
-
Publication number: 20190276000Abstract: A control system for a hybrid vehicle that shift an operating mode to an appropriate mode from a low mode or high mode. The hybrid vehicle comprises a power split mechanism connected to an engine and a first motor. When a required brake torque of a prime mover cannot be achieved during propulsion in an operating mode established by engaging one of clutches while stopping the engine, the control system excites a motoring of the engine by the first motor while maintaining engagement of the clutch engaged to establish the current operating mode.Type: ApplicationFiled: March 11, 2019Publication date: September 12, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yosuke Suzuki, Hideaki Komada, Hidekazu Nagai, Takahito Endo, Hirotsugu Yoshino, Hiroki Yasui
-
Patent number: 10359086Abstract: A selectable one-way clutch includes: a pocket plate including a plurality of housing concave portions; a notch plate including a plurality of engaging concave portions; plate-like engaging pieces, each being housed in each of the housing concave portions; elastic members, each being provided between a bottom portion of a corresponding housing concave portion of the housing concave portions and a corresponding engaging piece of the engaging pieces; and a selector plate provided between the pocket plate and the notch plate in a rotation axis direction of the notch plate. The bottom portion of the housing concave portion includes: a first bottom surface; and a second bottom surface formed at a position deeper than the first bottom surface.Type: GrantFiled: January 31, 2017Date of Patent: July 23, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Kurosaki, Hiroyuki Shioiri, Hiroyuki Shibata, Shotaro Kato, Hiroki Yasui
-
Publication number: 20190143962Abstract: A control system for a vehicle that prevents an unintentional mode change when a command signal cannot be transmitted to an engagement device. In the vehicle, HV-Lo mode is established by connecting a carrier to a carrier by a first clutch while disconnecting the carrier from a ring gear by a second clutch, and HV-Lo mode is established by disconnecting the carrier from the carrier by the first clutch while connecting the carrier to the ring gear by the second clutch. A normally stay clutch is used as at least one of the first clutch and the second clutch.Type: ApplicationFiled: November 9, 2018Publication date: May 16, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tatsuya IMAMURA, Hideaki KOMADA, Akiko NISHIMINE, Yosuke SUZUKI, Hidekazu NAGAI, Takahito ENDO, Hirotsugu YOSHINO, Kensei HATA, Hiroki YASUI
-
Patent number: 10220698Abstract: A drive unit of a hybrid vehicle includes an engine; an electric motor; first and second differential mechanisms; a selectable one-way clutch; and a case accommodating the electric motor. Further, the first differential mechanism includes a first rotational element coupled to the electric motor, a second rotational element coupled to the engine, and a third rotational element that outputs power toward drive wheels, the second differential mechanism includes a sun gear coupled to the electric motor, a carrier coupled to the engine, a ring gear whose rotation is regulated by the selectable one-way clutch, and a ring gear flange that rotates integrally with the ring gear, and the selectable one-way clutch switches a state thereof between a locked state and an unlocked state, and the ring gear flange is supported by a rotor shaft of the electric motor via a radial bearing.Type: GrantFiled: February 16, 2017Date of Patent: March 5, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Shibata, Hiroyuki Shioiri, Yuki Kurosaki, Shotaro Kato, Hiroki Yasui, Tomohiro Abe, Akira Hibino
-
Publication number: 20190047398Abstract: A drive unit for a vehicle having a shortened axial length. A drive unit includes a first planetary gear unit, a second planetary gear unit, a first clutch device, and a second clutch device. The first planetary gear unit and the second planetary gear unit are disposed adjacently in an axial direction, and transmit an engine torque to a cylindrical section to which a drive wheel is coupled. A second ring gear of the second planetary gear unit is formed on an inner circumference of the cylindrical section. An output gear is formed on an outer circumference of the cylindrical section. The first planetary gear unit is disposed on an inner circumferential side of an inner smooth region where the second ring gear is not formed in the inner circumference of the cylindrical section.Type: ApplicationFiled: July 27, 2018Publication date: February 14, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takahito ENDO, Hideaki KOMADA, Yosuke SUZUKI, Hidekazu NAGAI, Hirotsugu YOSHINO, Hiroki YASUI
-
Publication number: 20180238398Abstract: Described herein are various embodiments of a clutch assembly and separator plates for a clutch assembly. The clutch assembly may comprise a first separator plate; a second separator plate; and a spring coupled to the first separator plate and contacting the second separator plate, such that when compressed the spring applies a repulsive force separating the first separator plate and the second separator plate.Type: ApplicationFiled: February 20, 2017Publication date: August 23, 2018Inventors: Luke A. Rippelmeyer, Hiroki Yasui