Patents by Inventor Tsuyoshi Fujikane
Tsuyoshi Fujikane 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: 10814878Abstract: A control device of an automatic transmission to set and control a gear position based on a vehicle speed and an accelerator opening degree, includes a controller determining a high load travel based on a travel resistance during travel control on a gear shift line, which is set such that a region on a higher accelerator opening degree side of a downshift line is a region where a lock-up clutch is to be turned off, and turning off the lock-up clutch before downshifting when determining the high load travel.Type: GrantFiled: December 12, 2018Date of Patent: October 27, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Junichi Inoue, Tsuyoshi Fujikane
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Publication number: 20190225225Abstract: A control device of an automatic transmission to set and control a gear position based on a vehicle speed and an accelerator opening degree, includes a controller determining a high load travel based on a travel resistance during travel control on a gear shift line, which is set such that a region on a higher accelerator opening degree side of a downshift line is a region where a lock-up clutch is to be turned off, and turning off the lock-up clutch before downshifting when determining the high load travel.Type: ApplicationFiled: December 12, 2018Publication date: July 25, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Junichi INOUE, Tsuyoshi FUJIKANE
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Patent number: 10183669Abstract: A control apparatus for a vehicular drive unit is provided. The vehicular drive unit includes a continuously variable transmission, and a clutch. The control apparatus includes an electronic control unit that is configured to acquire an oil temperature of hydraulic oil for controlling the continuously variable transmission and the clutch, and control the clutch such that a torque capacity of the clutch becomes smaller than a torque capacity that is set in a case where an oil temperature of the hydraulic oil is higher than a predetermined oil temperature, when the oil temperature is equal to or lower than the predetermined oil temperature, or control the continuously variable transmission such that a speed ratio of the continuously variable transmission becomes equal to or larger than a lower limit set in advance when the oil temperature of the hydraulic oil is equal to or lower than the predetermined oil temperature.Type: GrantFiled: February 23, 2017Date of Patent: January 22, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazuya Ishiizumi, Tsuyoshi Fujikane, Koji Hattori, Akira Hino, Mitsuhiro Fukao
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Publication number: 20170253247Abstract: A control apparatus for a vehicular drive unit is provided. The vehicular drive unit includes a continuously variable transmission, and a clutch. The control apparatus includes an electronic control unit that is configured to acquire an oil temperature of hydraulic oil for controlling the continuously variable transmission and the clutch, and control the clutch such that a torque capacity of the clutch becomes smaller than a torque capacity that is set in a case where an oil temperature of the hydraulic oil is higher than a predetermined oil temperature, when the oil temperature is equal to or lower than the predetermined oil temperature, or control the continuously variable transmission such that a speed ratio of the continuously variable transmission becomes equal to or larger than a lower limit set in advance when the oil temperature of the hydraulic oil is equal to or lower than the predetermined oil temperature.Type: ApplicationFiled: February 23, 2017Publication date: September 7, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazuya ISHIIZUMI, Tsuyoshi FUJIKANE, Koji HATTORI, Akira HINO, Mitsuhiro FUKAO
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Patent number: 9145931Abstract: A control device for a vehicular lockup clutch, including a lockup clutch that directly connects an input rotation member and an output rotation member of a hydraulic transmission device constituting part of a power transmission path between an engine and drive wheels, a linear solenoid valve that controls an engagement hydraulic pressure for engaging and actuating the lockup clutch, and a controller that is configured to perform a flexible start control for slip-engaging the lockup clutch when a vehicle starts moving, and to perform, before starting the flexible start control, a precharge control for establishing a standby state in which a predetermined preparation pressure is indicated to the linear solenoid valve.Type: GrantFiled: December 11, 2013Date of Patent: September 29, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tsuyoshi Fujikane, Yousuke Kobayashi
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Patent number: 9050963Abstract: A map is provided that has an unlimited region where a take-off slip-engagement the next time is repeatedly executed indefinitely, a limited region where the take-off slip-engagement the next time is repeatedly executed only once, and a prohibited region where the take-off slip-engagement the next time is prohibited, and has a generated heat amount during the take-off slip-engagement and an elapsed time after the lock-up slip-engagement ends as variables. Therefore, a region in which the take-off slip-engagement the next time had been prohibited because the take-off slip-engagement the next time is unable to be repeatedly executed indefinitely even though it is able to be repeatedly executed only once is made the limited region, so the take-off slip-engagement the next time is allowed to be repeatedly executed only once.Type: GrantFiled: January 16, 2012Date of Patent: June 9, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kohei Dodo, Yoichi Nakashima, Atsushi Muto, Tsuyoshi Fujikane, Keigo Matsubara, Junichi Inoue
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Publication number: 20140097057Abstract: A control device for a vehicular lockup clutch, including a lockup clutch that directly connects an input rotation member and an output rotation member of a hydraulic transmission device constituting part of a power transmission path between an engine and drive wheels, a linear solenoid valve that controls an engagement hydraulic pressure for engaging and actuating the lockup clutch, and a controller that is configured to perform a flexible start control for slip-engaging the lockup clutch when a vehicle starts moving, and to perform, before starting the flexible start control, a precharge control for establishing a standby state in which a predetermined preparation pressure is indicated to the linear solenoid valve.Type: ApplicationFiled: December 11, 2013Publication date: April 10, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tsuyoshi FUJIKANE, Yousuke KOBAYASHI
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Patent number: 8640839Abstract: A control device for a vehicular power transmitting system including a torque converter (6) having a pump impeller (6p), a turbine wheel (6t), a stator wheel (6s) rotatably disposed between the turbine wheel and the pump impeller, and a lock-up clutch (L/U) includes a capacity coefficient control unit (126) that controls a capacity coefficient of the torque converter by controlling rotation of the stator wheel, and the capacity coefficient control unit increases the capacity coefficient of the torque converter based on an amount of heat generated during slip control of the lock-up clutch.Type: GrantFiled: November 12, 2009Date of Patent: February 4, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tsuyoshi Fujikane, Kazuyuki Shiiba, Hiromitsu Metsugi, Hiroki Takeda
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Patent number: 8632439Abstract: A control device for a vehicular lockup clutch, including a lockup clutch that directly connects an input rotation member and an output rotation member of a hydraulic transmission device constituting part of a power transmission path between an engine and drive wheels, a linear solenoid valve that controls an engagement hydraulic pressure for engaging and actuating the lockup clutch, and a controller that is configured to perform a flexible start control for slip-engaging the lockup clutch when a vehicle starts moving, and to perform, before starting the flexible start control, a precharge control for establishing a standby state in which a predetermined preparation pressure is indicated to the linear solenoid valve.Type: GrantFiled: December 22, 2010Date of Patent: January 21, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tsuyoshi Fujikane, Yousuke Kobayashi
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Publication number: 20140018209Abstract: A map is provided that has an unlimited region where a take-off slip-engagement the next time is repeatedly executed indefinitely, a limited region where the take-off slip-engagement the next time is repeatedly executed only once, and a prohibited region where the take-off slip-engagement the next time is prohibited, and has a generated heat amount during the take-off slip-engagement and an elapsed time after the lock-up slip-engagement ends as variables. Therefore, a region in which the take-off slip-engagement the next time had been prohibited because the take-off slip-engagement the next time is unable to be repeatedly executed indefinitely even though it is able to be repeatedly executed only once is made the limited region, so the take-off slip-engagement the next time is allowed to be repeatedly executed only once.Type: ApplicationFiled: January 16, 2012Publication date: January 16, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kohei Dodo, Yoichi Nakashima, Atsushi Muto, Tsuyoshi Fujikane, Keigo Matsubara, Junichi Inoue
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Publication number: 20110240428Abstract: A control device for a vehicular power transmitting system including a torque converter (6) having a pump impeller (6p), a turbine wheel (6t), a stator wheel (6s) rotatably disposed between the turbine wheel and the pump impeller, and a lock-up clutch (L/U) includes a capacity coefficient control unit (126) that controls a capacity coefficient of the torque converter by controlling rotation of the stator wheel, and the capacity coefficient control unit increases the capacity coefficient of the torque converter based on an amount of heat generated during slip control of the lock-up clutch.Type: ApplicationFiled: November 12, 2009Publication date: October 6, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tsuyoshi Fujikane, Kazuyuki Shiiba, Hiromitsu Metsugi, Hiroki Takeda
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Publication number: 20110233023Abstract: A control device for a vehicular lockup clutch, including a lockup clutch that directly connects an input rotation member and an output rotation member of a hydraulic transmission device constituting part of a power transmission path between an engine and drive wheels, a linear solenoid valve that controls an engagement hydraulic pressure for engaging and actuating the lockup clutch, and a controller that is configured to perform a flexible start control for slip-engaging the lockup clutch when a vehicle starts moving, and to perform, before starting the flexible start control, a precharge control for establishing a standby state in which a predetermined preparation pressure is indicated to the linear solenoid valve.Type: ApplicationFiled: December 22, 2010Publication date: September 29, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tsuyoshi FUJIKANE, Yousuke KOBAYASHI
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Patent number: 7596446Abstract: A change in a torque request for an internal combustion engine during a prediction period is predicted as a change in a target torque. Further, a change in an outputtable upper-limit torque during the prediction period is calculated as an upper-limit torque change. When the target torque is greater than the upper-limit torque by more than a judgment value during the prediction period, control is exercised to increase an intake air amount. Moreover, the torque difference between the target torque and upper-limit torque at a second time, which is later than a first time, is calculated to correct the torque difference with higher responsiveness than exhibited for intake air amount control.Type: GrantFiled: October 7, 2008Date of Patent: September 29, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshihiro Sakayanagi, Tsuyoshi Fujikane