Patents by Inventor Takuichiro Inoue
Takuichiro Inoue 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: 10655731Abstract: As a mode switching shift line when a sub-transmission mechanism is switched from a first-speed to a second-speed, a first mode switching shift line, which prioritizes a learning of a hydraulic pressure with which a Low brake starts to slip and a learning of a hydraulic pressure with which a High clutch starts to transmit a torque, or a second mode switching shift line, which is a shift line in a Low side with respect to the first mode switching shift line and prioritizes a fuel efficiency of an engine is selected, and the sub-transmission mechanism is switched from the first-speed to the second-speed on the basis of the selected mode switching shift line.Type: GrantFiled: February 17, 2016Date of Patent: May 19, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Takashi Koguchi, Sho Okutani, Kenji Hishida, Makoto Komatsu, Takuichiro Inoue, Jongkeun Lim, Hiroyasu Tanaka
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Patent number: 10385968Abstract: Disclosed is a control device for a continuously variable transmission (4) that has, as forward speed change stages, a first speed change stage (32) and a second speed change stage (33).Type: GrantFiled: September 24, 2014Date of Patent: August 20, 2019Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Takuichiro Inoue, Koutarou Tagami, Fumito Shinohara, Hiroyuki Suzuki, Yuji Okamoto, Takashi Nobukawa
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Patent number: 10371259Abstract: A control device for a continuously variable transmission with an auxiliary transmission includes: a cooperative control section being configured to shift the auxiliary transmission mechanism during the first inertia phase time period, and to shift the variator during the second inertia phase time period, when the cooperative control in which an input torque to the continuously variable transmission is equal to or smaller than a predetermined value in the cooperative control is judged, and being configured to shift the auxiliary transmission mechanism during the first inertia phase time period, and to shift the variator during the first inertia phase time period when the cooperative control in which the input torque to the continuously variable transmission is greater than the predetermined value is judged.Type: GrantFiled: September 24, 2014Date of Patent: August 6, 2019Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Mamiko Inoue, Takuichiro Inoue, Hiroyasu Tanaka
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Patent number: 10228055Abstract: A transmission controller increases hydraulic pressure supplied to a secondary pulley and decreases hydraulic pressure supplied to a primary pulley to shift a variator to a mechanical Low speed ratio when the hydraulic pressure supplied to the primary pulley and the secondary pulley vibrates. The transmission controller shifts the variator from the mechanical Low speed ratio to a High side when a sub-transmission mechanism is downshifted during controlling a speed ratio of the variator at the mechanical Low speed ratio.Type: GrantFiled: June 3, 2015Date of Patent: March 12, 2019Assignee: JATCO LTDInventors: Masashi Suwabe, Tetsuya Izumi, Masayuki Miyazono, Takuichiro Inoue, Kunihiro Takahashi, Makoto Komatsu, Yuji Okamoto
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Patent number: 10207715Abstract: An automatic transmission control device implements a downshift by disengagement of a clutch that is engaged in a gear position before the downshift. It is determined whether an engine state is in a predetermined region in which a change of an engine torque per a change of an accelerator pedal opening is smaller than that in another region, and the engine torque is within a predetermined range, and an engine rotational speed is within a predetermined range. It is determined whether an operating state is in a predetermined state of accelerator operation in which the accelerator pedal opening is larger than a predetermined value, and an accelerator pedal opening change rate has an absolute value smaller than a predetermined value. The downshift is inhibited in response to determination that the engine state is in the predetermined region and the operating state is in the predetermined state of accelerator operation.Type: GrantFiled: December 16, 2015Date of Patent: February 19, 2019Assignees: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Takashi Koguchi, Sho Okutani, Makoto Komatsu, Toshiaki Noda, Takuichiro Inoue, Yuuji Nagase, Hiroyasu Tanaka, Hideshi Wakayama
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Patent number: 10155517Abstract: An engine control device for a vehicle including a power train where a continuously variable transmission is coupled to an engine, includes engine torque control means configured to control the engine so as to obtain an basic engine torque corresponding to an operating state of the vehicle, and command means configured to command engine torque control means to increase an engine torque from the basic engine torque during a gear shifting from a first speed stage to a second speed stage.Type: GrantFiled: February 26, 2015Date of Patent: December 18, 2018Assignee: JATCO LTDInventors: Yuzuru Tohta, Hideshi Wakayama, Mamiko Inoue, Takuichiro Inoue
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Patent number: 10107394Abstract: A control device for a continuously variable transmission with an auxiliary transmission includes: a cooperative control section; and a depression shift control section, wherein when an actual transmission gear ratio of the variator at the judgment of the depression shift control is higher than a first transmission gear ratio set as a lowest value of a control of the transmission gear ratio, the depression shift control section configured to downshift the variator, and to set a target transmission gear ratio at the shift of the variator to a second transmission gear ratio which is a restriction value that is higher than the first transmission gear ratio.Type: GrantFiled: September 24, 2014Date of Patent: October 23, 2018Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Mamiko Inoue, Takuichiro Inoue, Hiroyasu Tanaka
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Patent number: 9964207Abstract: A transmission controller increases hydraulic pressure supplied to a secondary pulley and decreases hydraulic pressure supplied to a primary pulley to shift a variator to a mechanical Low speed ratio during the hydraulic pressure supplied to the primary pulley and the secondary pulley vibrates. The mechanical Low speed ratio is a speed ratio where a groove width of the primary pulley has a maximum value possible to be employed in structure of the primary pulley.Type: GrantFiled: June 3, 2015Date of Patent: May 8, 2018Assignees: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Kunihiro Takahashi, Tetsuya Izumi, Masayuki Miyazono, Takuichiro Inoue, Masashi Suwabe, Makoto Komatsu, Yuji Okamoto
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Publication number: 20180080546Abstract: As a mode switching shift line when a sub-transmission mechanism is switched from a first-speed to a second-speed, a first mode switching shift line, which prioritizes a learning of a hydraulic pressure with which a Low brake starts to slip and a learning of a hydraulic pressure with which a High clutch starts to transmit a torque, or a second mode switching shift line, which is a shift line in a Low side with respect to the first mode switching shift line and prioritizes a fuel efficiency of an engine is selected, and the sub-transmission mechanism is switched from the first-speed to the second-speed on the basis of the selected mode switching shift line.Type: ApplicationFiled: February 17, 2016Publication date: March 22, 2018Applicants: JATCO Ltd, NISSAN MOTOT CO., LTD.Inventors: Takashi KOGUCHI, Sho OKUTANI, Kenji HISHIDA, Makoto KOMATSU, Takuichiro INOUE, Jongkeun LIM, Hiroyasu TANAKA
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Publication number: 20180015928Abstract: An automatic transmission control device implements a downshift by disengagement of a clutch that is engaged in a gear position before the downshift. It is determined whether an engine state is in a predetermined region in which a change of an engine torque per a change of an accelerator pedal opening is smaller than that in another region, and the engine torque is within a predetermined range, and an engine rotational speed is within a predetermined range. It is determined whether an operating state is in a predetermined state of accelerator operation in which the accelerator pedal opening is larger than a predetermined value, and an accelerator pedal opening change rate has an absolute value smaller than a predetermined value. The downshift is inhibited in response to determination that the engine state is in the predetermined region and the operating state is in the predetermined state of accelerator operation.Type: ApplicationFiled: December 16, 2015Publication date: January 18, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Takashi KOGUCHI, Sho OKUTANI, Makoto KOMATSU, Toshiaki NODA, Takuichiro INOUE, Yuuji NAGASE, Hiroyasu TANAKA, Hideshi WAKAYAMA
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Publication number: 20170211697Abstract: A transmission controller increases hydraulic pressure supplied to a secondary pulley and decreases hydraulic pressure supplied to a primary pulley to shift a variator to a mechanical Low speed ratio when the hydraulic pressure supplied to the primary pulley and the secondary pulley vibrates. The transmission controller shifts the variator from the mechanical Low speed ratio to a High side when a sub-transmission mechanism is downshifted during controlling a speed ratio of the variator at the mechanical Low speed ratio.Type: ApplicationFiled: June 3, 2015Publication date: July 27, 2017Applicant: JATCO LtdInventors: Masashi SUWABE, Tetsuya IZUMI, Masayuki MIYAZONO, Takuichiro INOUE, Kunihiro TAKAHASHI, Makoto KOMATSU, Yuji OKAMOTO
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Publication number: 20170211691Abstract: A transmission controller increases hydraulic pressure supplied to a secondary pulley and decreases hydraulic pressure supplied to a primary pulley to shift a variator to a mechanical Low speed ratio during the hydraulic pressure supplied to the primary pulley and the secondary pulley vibrates. The mechanical Low speed ratio is a speed ratio where a groove width of the primary pulley has a maximum value possible to be employed in structure of the primary pulley.Type: ApplicationFiled: June 3, 2015Publication date: July 27, 2017Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Kunihiro TAKAHASHI, Tetsuya IZUMI, Masayuki MIYAZONO, Takuichiro INOUE, Masashi SUWABE, Makoto KOMATSU, Yuji OKAMOTO
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Patent number: 9566974Abstract: A transmission controller executes synchronization shift of shifting a variator in a direction opposite to a speed ratio change direction of a sub transmission mechanism when shifting a sub transmission mechanism. When a gear position of the sub transmission mechanism is at the second gear position and an output increase request of a power source is made, the transmission controller prohibits the synchronization shift and shifts only the sub transmission mechanism from a second gear position to a first gear position.Type: GrantFiled: November 9, 2012Date of Patent: February 14, 2017Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Hiroyasu Tanaka, Mamiko Inoue, Ryousuke Nonomura, Takuichiro Inoue, Norio Asai, Masato Mori, Satoru Ishii, Fumito Shinohara
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Publication number: 20170021834Abstract: An engine control device for a vehicle including a power train where a continuously variable transmission is coupled to an engine, includes engine torque control means configured to control the engine so as to obtain an basic engine torque corresponding to an operating state of the vehicle, and command means configured to command engine torque control means to increase an engine torque from the basic engine torque during a gear shifting from a first speed stage to a second speed stage.Type: ApplicationFiled: February 26, 2015Publication date: January 26, 2017Applicant: JATCO LtdInventors: Yuzuru TOHTA, Hideshi WAKAYAMA, Mamiko INOUE, Takuichiro INOUE
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Patent number: 9435434Abstract: A transmission controller determines whether or not to downshift a sub-transmission mechanism based on an opening and an opening speed of an accelerator pedal and a torque change rate of an engine, and downshifts the sub-transmission mechanism when a determination is made to downshift the sub-transmission mechanism.Type: GrantFiled: September 3, 2013Date of Patent: September 6, 2016Assignees: JATCO LTD, NISSAN MOTOR CO.,LTD.Inventors: Mamiko Inoue, Hiroyasu Tanaka, Takuichiro Inoue
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Patent number: 9416873Abstract: A transmission controller determines whether or not an input rotation speed of a sub-transmission mechanism is stagnant and executes a feedback control by adding a rotation speed change rate feedback correction amount caused by a difference between a target input rotation speed change rate and an actual input rotation speed change rate of the sub-transmission mechanism to a rotation speed feedback correction amount if the input rotation speed is determined to be stagnant.Type: GrantFiled: September 3, 2013Date of Patent: August 16, 2016Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Mamiko Inoue, Hiroyasu Tanaka, Takuichiro Inoue
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Publication number: 20160223081Abstract: A control device for a continuously variable transmission with an auxiliary transmission includes: a cooperative control section being configured to shift the auxiliary transmission mechanism during the first inertia phase time period, and to shift the variator during the second inertia phase time period, when the cooperative control in which an input torque to the continuously variable transmission is equal to or smaller than a predetermined value in the cooperative control is judged, and being configured to shift the auxiliary transmission mechanism during the first inertia phase time period, and to shift the variator during the first inertia phase time period when the cooperative control in which the input torque to the continuously variable transmission is greater than the predetermined value is judged.Type: ApplicationFiled: September 24, 2014Publication date: August 4, 2016Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Mamiko INOUE, Takuichiro INOUE, Hiroyasu TANAKA
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Publication number: 20160223079Abstract: Disclosed is a control device for a continuously variable transmission (4) that has, as forward speed change stages, a first speed change stage (32) and a second speed change stage (33).Type: ApplicationFiled: September 24, 2014Publication date: August 4, 2016Applicants: JATCO LTD, NISSAN MOTOR CO., LTDInventors: Seiichiro TAKAHASHI, Takuichiro INOUE, Koutarou TAGAMI, Fumito SHINOHARA, Hiroyuki SUZUKI, Yuji OKAMOTO, Takashi NOBUKAWA
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Publication number: 20160223080Abstract: A control device for a continuously variable transmission with an auxiliary transmission includes: a cooperative control section; and a depression shift control section, wherein when an actual transmission gear ratio of the variator at the judgment of the depression shift control is higher than a first transmission gear ratio set as a lowest value of a control of the transmission gear ratio, the depression shift control section configured to downshift the variator, and to set a target transmission gear ratio at the shift of the variator to a second transmission gear ratio which is a restriction value that is higher than the first transmission gear ratio.Type: ApplicationFiled: September 24, 2014Publication date: August 4, 2016Applicants: JATCO, NISSAN MOTOR CO., LTD.Inventors: Mamiko INOUE, Takuichiro INOUE, Hiroyasu TANAKA
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Patent number: 9157525Abstract: The automatic transmission includes a first friction engagement element which is engaged when a first gear position is realized and disengaged when a second gear position is realized, a second friction engagement element which is engaged when the second gear position is realized and disengaged when the first gear position is realized, and a controller. The controller causes the second friction engagement element to slip by decreasing an instructional pressure for the second friction engagement element while running in the second gear position, and learns an engagement start pressure of the first friction engagement element based on a change in a differential rotation of the second friction engagement element, or in a parameter that changes in accordance with the differential rotation, at a time when an instructional pressure for the first friction engagement element is increased during the slip.Type: GrantFiled: February 21, 2013Date of Patent: October 13, 2015Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Takuichiro Inoue, Hiroyasu Tanaka, Mamiko Inoue, Seiichiro Takahashi