Patents by Inventor Kouhei Toyohara
Kouhei Toyohara 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: 11692625Abstract: A continuously variable transmission includes a primary pulley, a secondary pulley, a metal belt and a controller. The metal ring includes a ring and a plurality of elements bundled by the ring. The elements have respective receiving portions opening in a radial direction of the metal belt and receive the ring in the receiving portions. Assuming a direction perpendicular to a circumferential direction and a radial direction of the metal belt as a lateral direction L, the controller executes a falling-off countermeasure control of the element when a relative movement of the element in the lateral direction L with respect to the ring is detected or a presence of an action of a force on the element which causes such relative movement is detected.Type: GrantFiled: November 1, 2019Date of Patent: July 4, 2023Assignee: JATCO LTDInventors: Masanori Yamazaki, Kouhei Toyohara, Yoshiteru Kanayama, Takashi Saitou, Tadaaki Hiraoka, Satoshi Ohata
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Patent number: 11686387Abstract: A continuously variable transmission includes a primary pulley, a secondary pulley, a metal belt wound around the primary pulley and the secondary pulley, and a controller. The metal belt includes a ring and a plurality of elements. The elements have respective receiving portions opening in a radial direction of the belt and receive the ring in the receiving portions. The controller executes a preliminary determined falling-off countermeasure control of the element when the end play larger than the predetermined length is detected to be generated or the continuously variable transmission is detected to be under the operation condition in which the end plays concentrate.Type: GrantFiled: November 1, 2019Date of Patent: June 27, 2023Assignee: JATCO LTDInventors: Tadaaki Hiraoka, Kouhei Toyohara, Masanori Yamazaki, Yoshiteru Kanayama, Takashi Saitou
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Patent number: 11365783Abstract: Disclosed is a transverse segment for a drive belt with a stack of rings and with a number of the transverse segments, which transverse segment includes a base part and two pillar parts that respectively extend from a respective axial side of the base part in radial outward direction, defining a central opening of the transverse segment between them, and that are each provided with a hook portion extending over a part of the central opening in the general direction of the respectively opposite pillar part. A width dimension of one of the pillar parts of the transverse segment is less than a width dimension of the respective other pillar part.Type: GrantFiled: May 17, 2018Date of Patent: June 21, 2022Assignees: JATCO LTD, ROBERT BOSCH GMBHInventors: Yuji Takahashi, Geert Lamers, Kouhei Toyohara, Michael Keersmaekers, Makoto Momoi, Takeshi Kimura
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Publication number: 20220178440Abstract: A continuously variable transmission includes a primary pulley, a secondary pulley, a metal belt wound around the primary pulley and the secondary pulley, and a controller. The metal belt includes a ring and a plurality of elements. The elements have respective receiving portions opening in a radial direction of the belt and receive the ring in the receiving portions. The controller executes a preliminary determined falling-off countermeasure control of the element when the end play larger than the predetermined length is detected to be generated or the continuously variable transmission is detected to be under the operation condition in which the end plays concentrate.Type: ApplicationFiled: November 1, 2019Publication date: June 9, 2022Applicant: JATCO LtdInventors: Tadaaki HIRAOKA, Kouhei TOYOHARA, Masanori YAMAZAKI, Yoshiteru KANAYAMA, Takashi SAITOU
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Publication number: 20220145988Abstract: A continuously variable transmission includes a primary pulley, a secondary pulley, a metal belt and a controller. The metal ring includes a ring and a plurality of elements bundled by the ring. The elements have respective receiving portions opening in a radial direction of the metal belt and receive the ring in the receiving portions. Assuming a direction perpendicular to a circumferential direction and a radial direction of the metal belt as a lateral direction L, the controller executes a falling-off countermeasure control of the element when a relative movement of the element in the lateral direction L with respect to the ring is detected or a presence of an action of a force on the element which causes such relative movement is detected.Type: ApplicationFiled: November 1, 2019Publication date: May 12, 2022Applicant: JATCO LtdInventors: Masanori YAMAZAKI, Kouhei TOYOHARA, Yoshiteru KANAYAMA, Takashi SAITOU, Tadaaki HIRAOKA, Satoshi OHATA
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Patent number: 10711884Abstract: A control method of a continuously variable transmission includes supplying oil pressure to a secondary pulley oil chamber by a source pressure oil pump, and controlling a flow of oil into and from a primary pulley oil chamber by an electric oil pump arranged in an oil passage between the primary pulley oil chamber and the secondary pulley oil chamber. After start-up of the source pressure oil pump, an operation of the electric oil pump is restricted until the oil is filled in the oil passage on the secondary pulley oil chamber side of the electric oil pump. The operation of the electric oil pump is permitted when rotation speed of the electric oil pump reaches a predetermined rotation speed.Type: GrantFiled: August 7, 2017Date of Patent: July 14, 2020Assignee: Nissan Motor Co., Ltd.Inventors: Ryohey Toyota, Tomoyuki Nakano, Hiromu Terai, Akira Takano, Kouhei Toyohara
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Publication number: 20200103000Abstract: Disclosed is a transverse segment for a drive belt with a stack of rings and with a number of the transverse segments, which transverse segment includes a base part and two pillar parts that respectively extend from a respective axial side of the base part in radial outward direction, defining a central opening of the transverse segment between them, and that are each provided with a hook portion extending over a part of the central opening in the general direction of the respectively opposite pillar part. A width dimension of one of the pillar parts of the transverse segment is less than a width dimension of the respective other pillar part.Type: ApplicationFiled: May 17, 2018Publication date: April 2, 2020Inventors: Yuji TAKAHASHI, Geert LAMERS, Kouhei TOYOHARA, Michael KEERSMAEKERS, Makoto MOMOI, Takeshi KIMURA
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Patent number: 10584789Abstract: A control method of a continuously variable transmission includes supplying oil pressure to a line-pressure oil passage and a secondary pulley oil chamber by a source pressure oil pump, controlling a flow of oil into and from a primary pulley oil chamber by an electric oil pump arranged in an oil passage between the primary pulley oil chamber and the secondary pulley oil chamber, and limiting a discharge flowrate of the electric oil pump to an amount smaller than a discharge flowrate of the source pressure oil pump.Type: GrantFiled: August 7, 2017Date of Patent: March 10, 2020Assignee: Nissan Motor Co., Ltd.Inventors: Ryohey Toyota, Tomoyuki Nakano, Hiromu Terai, Akira Takano, Kouhei Toyohara
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Patent number: 10458546Abstract: A continuously variable transmission includes a variator having a primary pulley that has a primary oil chamber, a secondary pulley that has a secondary oil chamber, and a belt looped over the primary pulley and the secondary pulley, wherein secondary pressure is supplied to the secondary oil chamber, an oil pump provided in an oil passage that provides communication between the primary oil chamber and the secondary oil chamber, and a controller. The oil pump is configured to control an inflow and an outflow of oil of the primary oil chamber. The oil pump is formed by a gear pump. The continuously variable transmission controls the oil pump in such a manner that a target speed ratio of the variator is achieved.Type: GrantFiled: August 7, 2017Date of Patent: October 29, 2019Assignee: Nissan Motor Co., Ltd.Inventors: Kouhei Toyohara, Tomoyuki Nakano, Hiromu Terai, Ryohey Toyota
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Publication number: 20190257413Abstract: A control method of a continuously variable transmission includes supplying oil pressure to a secondary pulley oil chamber by a source pressure oil pump, and controlling a flow of oil into and from a primary pulley oil chamber by an electric oil pump arranged in an oil passage between the primary pulley oil chamber and the secondary pulley oil chamber. After start-up of the source pressure oil pump, an operation of the electric oil pump is restricted until the oil is filled in the oil passage on the secondary pulley oil chamber side of the electric oil pump. The operation of the electric oil pump is permitted when rotation speed of the electric oil pump reaches a predetermined rotation speed.Type: ApplicationFiled: August 7, 2017Publication date: August 22, 2019Applicant: Nissan Motor Co., Ltd.Inventors: Ryohey Toyota, Tomoyuki Nakano, Hiromu Terai, Akira Takano, Kouhei Toyohara
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Publication number: 20190203834Abstract: A continuously variable transmission includes a variator having a primary pulley that has a primary oil chamber, a secondary pulley that has a secondary oil chamber, and a belt looped over the primary pulley and the secondary pulley, wherein secondary pressure is supplied to the secondary oil chamber, an oil pump provided in an oil passage that provides communication between the primary oil chamber and the secondary oil chamber, and a controller. The oil pump is configured to control an inflow and an outflow of oil of the primary oil chamber. The oil pump is formed by a gear pump. The continuously variable transmission controls the oil pump in such a manner that a target speed ratio of the variator is achieved.Type: ApplicationFiled: August 7, 2017Publication date: July 4, 2019Applicant: Nissan Motor Co., Ltd.Inventors: Kouhei Toyohara, Tomoyuki Nakano, Hiromu Terai, Ryohey Toyota
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Publication number: 20190195343Abstract: A control method of a continuously variable transmission includes supplying oil pressure to a line-pressure oil passage and a secondary pulley oil chamber by a source pressure oil pump, controlling a flow of oil into and from a primary pulley oil chamber by an electric oil pump arranged in an oil passage between the primary pulley oil chamber and the secondary pulley oil chamber, and limiting a discharge flowrate of the electric oil pump to an amount smaller than a discharge flowrate of the source pressure oil pump.Type: ApplicationFiled: August 7, 2017Publication date: June 27, 2019Applicant: Nissan Motor Co., Ltd.Inventors: Ryohey Toyota, Tomoyuki Nakano, Hiromu Terai, Akira Takano, Kouhei Toyohara
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Publication number: 20180251018Abstract: A powertrain includes; a first shaft connected to a first power source; a second shaft including first and second parts connected with a second power source and an output element respectively; first and second drive gears supported so as to be able to rotate relative to the first shaft; first and second driven gears supported on and fixed to the second shaft and respectively meshing with the first and second drive gears constantly; a first clutch capable of engaging the first drive gear with the first shaft; a second clutch capable of engaging the second drive gear with the first shaft; and a third clutch capable of connecting and disconnecting the first part to and from the second part between the first and second driven gears. Consequently, a powertrain with driving paths from multiple power sources in multiple stages can be achieved while avoiding the use of a three-shaft structure.Type: ApplicationFiled: August 29, 2016Publication date: September 6, 2018Applicant: JATCO LtdInventors: Yoshihiro KURAHASHI, Kouhei TOYOHARA
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Patent number: 8814735Abstract: Each steel element for a V-belt of a continuously variable transmission has a flank (4a) that comprises a plurality of equally spaced raised portions (41) each being placed between two fine grooves (42). A flat flatness ratio (FR) given by the equation (1) is set to the highest one of values that are capable of practically machining the flank (4a) of the steel element (4) and capable of causing the flank (4a) to exhibit a given and satisfied lubrication oil discharging effect, and a groove pitch (GP) that is a distance between the two fine grooves (42) is set to a value that is capable of practically machining the flank of the steel element and capable of causing the flank to exhibit a given and satisfied lubrication oil discharging effect. The groove pitch thus set is a value that is permitted by the higher value of the flatness ratio thus set. FR (%)=WRP/(WRP+WG)×100??(1) wherein: FR: Flatness ratio WRP: Width of the raised portion (41) WG: Width of the groove (42).Type: GrantFiled: May 7, 2009Date of Patent: August 26, 2014Assignee: Jatco LtdInventors: Kouhei Toyohara, Kazuhiro Mizumiya, Yoshitaka Miura, Tsutomu Kamitani, Shinji Kiyohara
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Publication number: 20090280940Abstract: Each steel element for a V-belt of a continuously variable transmission has a flank (4a) that comprises a plurality of equally spaced raised portions (41) each being placed between two fine grooves (42). A flat flatness ratio (FR) given by the equation (1) is set to the highest one of values that are capable of practically machining the flank (4a) of the steel element (4) and capable of causing the flank (4a) to exhibit a given and satisfied lubrication oil discharging effect, and a groove pitch (GP) that is a distance between the two fine grooves (42) is set to a value that is capable of practically machining the flank of the steel element and capable of causing the flank to exhibit a given and satisfied lubrication oil discharging effect. The groove pitch thus set is a value that is permitted by the higher value of the flatness ratio thus set.Type: ApplicationFiled: May 7, 2009Publication date: November 12, 2009Inventors: Kouhei TOYOHARA, Kazuhiro Mizumiya, Yoshitaka Miura, Tsutomu Kamitani, Shinji Kiyohara
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Patent number: 7021192Abstract: A pair of throttle valves are installed to first and second installation holes of a cylinder tube, respectively. The throttle valve comprises a rotatable member, a needle which is engaged with the rotatable member and which controls the flow rate of a pressure fluid flowing through first and second bypass passages formed in each of the first and second installation holes, a covering member which covers each of said first and second installation holes, and a stopper ring which prevents the displacement of the rotatable member.Type: GrantFiled: February 25, 2004Date of Patent: April 4, 2006Assignee: SMC Kabushiki KaishaInventors: Kazushi Kita, Jun Yamada, Kazufumi Waki, Kouhei Toyohara, Yuuya Osamura
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Publication number: 20040237774Abstract: A pair of throttle valves are installed to first and second installation holes of a cylinder tube, respectively. The throttle valve comprises a rotatable member, a needle which is engaged with the rotatable member and which controls the flow rate of a pressure fluid flowing through first and second bypass passages formed in each of the first and second installation holes, a covering member which covers each of said first and second installation holes, and a stopper ring which prevents the displacement of the rotatable member.Type: ApplicationFiled: February 25, 2004Publication date: December 2, 2004Applicant: SMC Kabushiki KaishaInventors: Kazushi Kita, Jun Yamada, Kazufumi Waki, Kouhei Toyohara, Yuuya Osamura
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Patent number: D500258Type: GrantFiled: August 28, 2003Date of Patent: December 28, 2004Assignee: SMC Kabushiki KaishaInventors: Kazushi Kita, Jun Yamada, Kazufumi Waki, Kouhei Toyohara, Yuuya Osamura
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Patent number: D500259Type: GrantFiled: August 28, 2003Date of Patent: December 28, 2004Assignee: SMC Kabushiki KaishaInventors: Kazushi Kita, Jun Yamada, Kazufumi Waki, Kouhei Toyohara, Yuuya Osamura