Patents by Inventor Tetsuya Izumi
Tetsuya Izumi 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: 11972270Abstract: A communication device may include: a memory configured to store management information in which, for each of a plurality of OIDs of a MIB, the OID and a setting value are associated with each other; and a controller, wherein the controller may be configured to: receive a setting command which conforms to TCP; write the setting value included in the setting command to the management information in association with the OID included in the setting command; and send a response command which conforms to the TCP. In a case where the setting command including a first OID and a first setting value is received, the controller may be configured to: write the first setting value to the management information in association with the first OID after the response command has been sent, and send the response command before the first setting value is written to the management information.Type: GrantFiled: July 27, 2023Date of Patent: April 30, 2024Assignee: Brother Kogyo Kabushiki KaishaInventors: Koki Izumi, Satoshi Matsushita, Satoru Yanagi, Munehisa Matsuda, Kiyotaka Ohara, Katsunori Enomoto, Yuki Yada, Kyohei Mori, Hideki Nogawa, Tetsuya Okuno
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Patent number: 10724633Abstract: The present invention is related to a vehicle including a motor-generator, a transmission, a shift hydraulic control unit, and a CVT control unit (CVTCU). When a downshift of the transmission is performed without an acceleration request from a driver, the CVTCU sets a pulley thrust at a secondary pulley on the basis of a first lower limit as a lower limit, which is a sum of a fundamental thrust and a first correction thrust. The CVTCU also sets a pulley thrust at a primary pulley on the basis of a second lower limit as a lower limit, which is a sum of the fundamental thrust and a second correction thrust.Type: GrantFiled: February 18, 2016Date of Patent: July 28, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Hiroki Iwasa, Hironori Miyaishi, Sungpil Ryu, Tetsuya Izumi
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Patent number: 10690238Abstract: Provided are a variator and a transmission controller in an engine-driven vehicle. The transmission controller has an instantaneous interruption recovery control portion configured to, upon a power reset from an instantaneous interruption during running, set a target through transmission ratio and a desired through transmission ratio to a lowest transmission ratio value by initialization and perform recovery control to recover an actual through transmission ratio of the variator to a transmission ratio value for shifting to normal control. The instantaneous interruption recovery control portion is further configured to, upon the power reset from the instantaneous interruption during the running, set a change speed of the target through transmission ratio from the lowest transmission ratio value to the desired through transmission ratio, to be higher than that under the normal control, before a time at which the desired through transmission ratio value deviates from the lowest transmission ratio value.Type: GrantFiled: September 6, 2016Date of Patent: June 23, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Yasunori Ishii, Tetsuya Izumi, Sungpil Ryu, Hiroki Iwasa, Hironori Miyaishi
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Patent number: 10612651Abstract: In a vehicle equipped with a torque converter 4 having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. When the lock-up clutch (3) experiences a transition to an engaged state during travel, a meet-point learning control unit (12c) calculates an LU transmission torque estimate on the basis of the difference between the engine torque (engine torque signal value Te) and the torque converter transmission torque (?·Ne2). Excess clutch capacity is detected when the LU transmission torque estimate is greater than an excess capacity determination transmission torque threshold within a prescribed amount of time after an initial pressure (P_n) based on the learning value (L_n) is instructed. When excess clutch capacity is detected, a learning value correction that reduces the learning value (L_n) is carried out.Type: GrantFiled: August 31, 2016Date of Patent: April 7, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Toshimitsu Araki, Hideshi Wakayama, Kouji Saitou, Seiji Kasahara, Tetsuya Izumi
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Patent number: 10550938Abstract: A hydraulic pressure controller includes belt sandwiching force increasing means. The belt sandwiching force increasing means increases a belt sandwiching force by a primary pulley and a secondary pulley on the basis of a braking force request from a driver, up to a predetermined value to prevent a belt from slipping due to a braking force. The belt sandwiching force increasing means increases the belt sandwiching force in a range of less than the predetermined value before the braking force request occurs.Type: GrantFiled: February 18, 2016Date of Patent: February 4, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Hiroki Iwasa, Hironori Miyaishi, Tetsuya Izumi
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Publication number: 20200025288Abstract: Provided are a variator and a transmission controller in an engine-driven vehicle. The transmission controller has an instantaneous interruption recovery control portion configured to, upon a power reset from an instantaneous interruption during running, set a target through transmission ratio and a desired through transmission ratio to a lowest transmission ratio value by initialization and perform recovery control to recover an actual through transmission ratio of the variator to a transmission ratio value for shifting to normal control. The instantaneous interruption recovery control portion is further configured to, upon the power reset from the instantaneous interruption during the running, set a change speed of the target through transmission ratio from the lowest transmission ratio value to the desired through transmission ratio, to be higher than that under the normal control, before a time at which the desired through transmission ratio value deviates from the lowest transmission ratio value.Type: ApplicationFiled: September 6, 2016Publication date: January 23, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Yasunori ISHII, Tetsuya IZUMI, Sungpil RYU, Hiroki IWASA, Hironori MIYAISHI
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Patent number: 10507833Abstract: A vehicle control device for controlling a vehicle including an oil pump driven by a transmission of a rotation of the motor-generator; and a hydraulic pressure supply unit for supplying a hydraulic pressure to the continuously variable transmission. The hydraulic pressure is generated by regulating a pressure of an oil discharged from the oil pump. When a regenerative braking is performed by the motor-generator based on a deceleration request from a driver, the hydraulic pressure supply unit supplies a hydraulic pressure based on a first hydraulic pressure and a second hydraulic pressure to the continuously variable transmission. The first hydraulic pressure is a hydraulic pressure to transmit an input torque input to the continuously variable transmission during the regenerative braking. The second hydraulic pressure is a hydraulic pressure to shift the continuously variable transmission during the regenerative braking.Type: GrantFiled: February 22, 2016Date of Patent: December 17, 2019Assignee: JATCO LTDInventors: Hiroki Iwasa, Hironori Miyaishi, Tetsuya Izumi
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Patent number: 10502314Abstract: An oil pump driving control device of a vehicle having a main oil pump (14) that is driven by a motor/generator (4) and produces a pump discharge oil to a first clutch (3), a second clutch (5) and a belt-type continuously variable transmission (6) provided on a driving force transmission line. A hybrid control module (81) is provided in this FF hybrid vehicle. The hybrid control module (81) is configured to perform a control so that during vehicle stop, the lower an ATF oil temperature is, the more the pump driving energy to drive the main oil pump (14) is decreased. With this control, consumption energy during the vehicle stop can be reduced.Type: GrantFiled: March 3, 2016Date of Patent: December 10, 2019Assignee: JATCO LTDInventors: Takanobu Mouri, Taiichi Onoyama, Seishi Shimamura, Kakuzou Kaneko, Akihiro Toyofuku, Ryuichi Arai, Ryuzo Noguchi, Satoshi Harui, Hironori Miyaishi, Tomoyuki Mizuochi, Kenichi Watanabe, Masumi Fujikawa, Kouichi Kotsuji, Shingo Suzuki, Akito Suzuki, Tetsuya Izumi, Keisuke Iwado, Kazuhiro Miyachi
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Patent number: 10457290Abstract: An FF hybrid vehicle control device having an HEV mode and an EV mode as drive modes is provided with a CVT control unit (84) for determining primary pulley pressure (Ppri) and secondary pulley pressure (Psec) with which a belt (6c) of a belt-type continuously variable transmission (6) will be clamped on the basis of a torque component inputted to the belt-type continuously variable transmission (6) during brake deceleration, and the corrected amount of brake torque which is an inertia torque correction component. The CVT control unit (84) reduces the corrected amount of brake torque during brake deceleration when EV mode is selected to be less than the corrected amount of brake torque during brake deceleration when HEV mode is selected.Type: GrantFiled: February 10, 2016Date of Patent: October 29, 2019Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Hironori Miyaishi, Tomoyuki Mizuochi, Akito Suzuki, Tetsuya Izumi
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Patent number: 10377368Abstract: A controller is provided so as to control, when an electric vehicle (EV) mode is selected, a belt clamping pressure on the basis of discharged oil from a main oil pump which is driven by a motor generator. The controller is provided for a hybrid vehicle and is configured to perform control such that when the vehicle is stopped in the EV mode and a creep cut condition which does not require creep torque from the motor generator is met, a first motor idling rotation speed is set as a motor rotation speed. When the vehicle is stopped in the EV mode and a standby learning control completes learning of a zero-point oil pressure command value, the controller reduces a rotation speed of the motor generator to a second motor idling rotation speed which is lower than the first motor idling rotation speed.Type: GrantFiled: February 3, 2016Date of Patent: August 13, 2019Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Hironori Miyaishi, Tomoyuki Mizuochi, Kenichi Watanabe, Masumi Fujikawa, Kouichi Kotsuji, Shingo Suzuki, Akito Suzuki, Tetsuya Izumi, Keisuke Iwado, Takanobu Mouri, Taiichi Onoyama, Seishi Shimamura, Akihiro Toyofuku, Ryuichi Arai, Kakuzou Kaneko, Ryuzo Noguchi, Satoshi Harui
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Patent number: 10378644Abstract: Disclosed is a control apparatus for a vehicular transmission comprising: a vehicle speed sensor; an accelerator opening angle sensor; and a gear-shift control section (8D) of a CVTECU 8. The vehicle speed sensor includes: an output shaft rotation speed sensor (90) configured to detect a rotation speed (rotation numbers) of an output shaft (41) of the automatic transmission; road wheel rotation speed sensors configured to detect rotation speeds (rotation numbers) of four road wheels (90B through 90E); and a vehicle speed calculating section (8B) of CVTECU 8 configured to calculate the vehicle speed from the information of the road wheel rotation speeds when a preset predetermined condition as a condition under which vertical variations of the rotation speed of the output shaft are generated is established and calculate the vehicle speed from the output shaft rotation speed information if the predetermined condition is not established.Type: GrantFiled: March 7, 2016Date of Patent: August 13, 2019Assignee: JATCO LTDInventors: Hiroki Iwasa, Tetsuya Izumi
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Patent number: 10315504Abstract: A displayed rotation speed control apparatus for a hybrid vehicle includes: a displayed rotation speed controller having a display mode in which a target primary rotation speed stepwisely set is displayed as a driving source rotation speed in the rotation speed display device in the simulated stepwise shift mode, when the mode is switched from the EV mode to the HEV mode to initiate a starting of the engine, and when the mode is switched from the continuous shift mode to the simulated stepwise shift mode while an actual engine speed is smaller than a predetermined rotation speed, the displayed rotation speed controller being configured to display a value obtained by retarding the actual engine speed, during a period from the initiation of the starting of the engine to a rotation speed smaller than a predetermined rotation speed.Type: GrantFiled: March 3, 2016Date of Patent: June 11, 2019Assignees: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Hironori Miyaishi, Akito Suzuki, Tetsuya Izumi, Toshiaki Motomura
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Patent number: 10240672Abstract: When a switch condition where a shift of a continuously variable transmission is switched from a first shift that is any one of an upshift and a downshift to another second shift is satisfied, an integral term in the feedback control of the first shift is reduced to zero with a first predetermined gradient, an operation of an integral term in the feedback control of the second shift is started after the switch condition is satisfied and before the integral term in the feedback control of the first shift reaches zero, and the continuously variable transmission is shifted based on a sum of the integral term in the feedback control of the first shift and the integral term in the feedback control of the second shift.Type: GrantFiled: February 22, 2016Date of Patent: March 26, 2019Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Hiroki Iwasa, Ryu Sungpil, Hironori Miyaishi, Tetsuya Izumi
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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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Publication number: 20180297465Abstract: A displayed rotation speed control apparatus for a hybrid vehicle includes: a displayed rotation speed controller having a display mode in which a target primary rotation speed stepwisely set is displayed as a driving source rotation speed in the rotation speed display device in the simulated stepwise shift mode, when the mode is switched from the EV mode to the HEV mode to initiate a starting of the engine, and when the mode is switched from the continuous shift mode to the simulated stepwise shift mode while an actual engine speed is smaller than a predetermined rotation speed, the displayed rotation speed controller being configured to display a value obtained by retarding the actual engine speed, during a period from the initiation of the starting of the engine to a rotation speed smaller than a predetermined rotation speed.Type: ApplicationFiled: March 3, 2016Publication date: October 18, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Hironori MIYAISHI, Akito SUZUKI, Tetsuya IZUMI, Toshiaki MOTOMURA
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Publication number: 20180216729Abstract: In a vehicle equipped with a torque converter 4 having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. When the lock-up clutch (3) experiences a transition to an engaged state during travel, a meet-point learning control unit (12c) calculates an LU transmission torque estimate on the basis of the difference between the engine torque (engine torque signal value Te) and the torque converter transmission torque (?·Ne2). Excess clutch capacity is detected when the LU transmission torque estimate is greater than an excess capacity determination transmission torque threshold within a prescribed amount of time after an initial pressure (P_n) based on the learning value (L_n) is instructed. When excess clutch capacity is detected, a learning value correction that reduces the learning value (L_n) is carried out.Type: ApplicationFiled: August 31, 2016Publication date: August 2, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Toshimitsu ARAKI, Hideshi WAKAYAMA, Kouji SAITOU, Seiji KASAHARA, Tetsuya IZUMI
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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: 20180106361Abstract: Disclosed is a control apparatus for a vehicular transmission comprising: a vehicle speed sensor; an accelerator opening angle sensor; and a gear-shift control section (8D) of a CVTECU 8. The vehicle speed sensor includes: an output shaft rotation speed sensor (90) configured to detect a rotation speed (rotation numbers) of an output shaft (41) of the automatic transmission; road wheel rotation speed sensors configured to detect rotation speeds (rotation numbers) of four road wheels (90B through 90E); and a vehicle speed calculating section (8B) of CVTECU 8 configured to calculate the vehicle speed from the information of the road wheel rotation speeds when a preset predetermined condition as a condition under which vertical variations of the rotation speed of the output shaft are generated is established and calculate the vehicle speed from the output shaft rotation speed information if the predetermined condition is not established.Type: ApplicationFiled: March 7, 2016Publication date: April 19, 2018Applicant: JATCO LtdInventors: Hiroki IWASA, Tetsuya IZUMI
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Publication number: 20180080550Abstract: When a switch condition where a shift of a continuously variable transmission is switched from a first shift that is any one of an upshift and a downshift to another second shift is satisfied, an integral term in the feedback control of the first shift is reduced to zero with a first predetermined gradient, an operation of an integral term in the feedback control of the second shift is started after the switch condition is satisfied and before the integral term in the feedback control of the first shift reaches zero, and the continuously variable transmission is shifted based on a sum of the integral term in the feedback control of the first shift and the integral term in the feedback control of the second shift.Type: ApplicationFiled: February 22, 2016Publication date: March 22, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Hiroki IWASA, Ryu SUNGPIL, Hironori MIYAISHI, Tetsuya IZUMI
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Publication number: 20180080553Abstract: The present invention is related to a vehicle including a motor-generator, a transmission, a shift hydraulic control unit, and a CVT control unit (CVTCU). When a downshift of the transmission is performed without an acceleration request from a driver, the CVTCU sets a pulley thrust at a secondary pulley on the basis of a first lower limit as a lower limit, which is a sum of a fundamental thrust and a first correction thrust. The CVTCU also sets a pulley thrust at a primary pulley on the basis of a second lower limit as a lower limit, which is a sum of the fundamental thrust and a second correction thrust.Type: ApplicationFiled: February 18, 2016Publication date: March 22, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Hiroki IWASA, Hironori MIYAISHI, Sungpil RYU, Tetsuya IZUMI