Patents by Inventor Fumito Shinohara
Fumito Shinohara 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: 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: 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: 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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Patent number: 9080671Abstract: A first determining unit configured to determine whether the indicated pressure of a primary pulley pressure has become a line pressure during an up shift, an indicated pressure control unit configured to make the indicated pressure of the primary pulley pressure alone higher than the line pressure when the target shift rate is determined to be equal to or lower than a predetermined shift rate and the speed ratio is determined not to have become the target speed ratio, and an estimated time detecting unit configured to detect a predetermined time it takes until the primary pulley pressure can be regarded as being equal to the line pressure after the target shift rate is determined to be equal to or lower than the predetermined shift rate, and the indicated pressure of the primary pulley pressure is made higher than the line pressure, are provided, and the indicated pressure control unit is configured to calculate the deviation between the indicated pressure of the primary pulley pressure and indicated pressurType: GrantFiled: November 12, 2012Date of Patent: July 14, 2015Assignee: JATCO LTDInventors: Hideaki Suzuki, Yoshio Yasui, Yuuji Nagase, Fumito Shinohara
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Patent number: 9062742Abstract: A continuously-variable transmission, which has a first pulley, which has a first fixed pulley and a first mobile pulley, a second pulley, which has a second fixed pulley and a second mobile pulley, and a drive force transmitting member, which is stretched between the first pulley and the second pulley, is provided, and this continuously-variable transmission has an indicated pressure calculation section, which calculates the indicated pressure of the first pulley, a stroke speed calculation section, which calculates the stroke speed of the first mobile pulley, and an oil pressure calculation section, which, when oil is discharged from an oil chamber, calculates the amount of increase of oil pressure in a first pulley oil chamber that increases compared to the indicated pressure due to the channel resistance of the discharge path, based on the channel resistance and the stroke speed, and a correction section, which, when oil is discharged from the first pulley oil chamber, subtracts the amount of increase ofType: GrantFiled: November 12, 2012Date of Patent: June 23, 2015Assignee: JATCO LTDInventors: Hideaki Suzuki, Yoshio Yasui, Yuuji Nagase, Fumito Shinohara
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Publication number: 20140342860Abstract: A continuously-variable transmission, which has a first pulley, which has a first fixed pulley and a first mobile pulley, a second pulley, which has a second fixed pulley and a second mobile pulley, and a drive force transmitting member, which is stretched between the first pulley and the second pulley, is provided, and this continuously-variable transmission has an indicated pressure calculation section, which calculates the indicated pressure of the first pulley, a stroke speed calculation section, which calculates the stroke speed of the first mobile pulley, and an oil pressure calculation section, which, when oil is discharged from an oil chamber, calculates the amount of increase of oil pressure in a first pulley oil chamber that increases compared to the indicated pressure due to the channel resistance of the discharge path, based on the channel resistance and the stroke speed, and a correction section, which, when oil is discharged from the first pulley oil chamber, subtracts the amount of increase ofType: ApplicationFiled: November 12, 2012Publication date: November 20, 2014Inventors: Hideaki Suzuki, Yoshio Yasui, Yuuji Nagase, Fumito Shinohara
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Publication number: 20140343810Abstract: A first determining unit configured to determine whether the indicated pressure of a primary pulley pressure has become a line pressure during an up shift, an indicated pressure control unit configured to make the indicated pressure of the primary pulley pressure alone higher than the line pressure when the target shift rate is determined to be equal to or lower than a predetermined shift rate and the speed ratio is determined not to have become the target speed ratio, and an estimated time detecting unit configured to detect a predetermined time it takes until the primary pulley pressure can be regarded as being equal to the line pressure after the target shift rate is determined to be equal to or lower than the predetermined shift rate, and the indicated pressure of the primary pulley pressure is made higher than the line pressure, are provided, and the indicated pressure control unit is configured to calculate the deviation between the indicated pressure of the primary pulley pressure and indicated pressurType: ApplicationFiled: November 12, 2012Publication date: November 20, 2014Inventors: Hideaki Suzuki, Yoshio Yasui, Yuuji Nagase, Fumito Shinohara
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Publication number: 20140342876Abstract: 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: ApplicationFiled: November 9, 2012Publication date: November 20, 2014Inventors: Hiroyasu Tanaka, Mamiko Inoue, Ryousuke Nonomura, Takuichiro Inoue, Norio Asai, Masato Mori, Satoru Ishii, Fumito Shinohara
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Patent number: 7998006Abstract: In a speed ratio control device for a belt continuously variable transmission according to this invention, when a speed ratio is subjected to feedback control on the basis of a difference between an actual speed ratio and a target speed ratio, pressure supplied to a primary pulley is corrected through feedforward (S17, S18) in order to suppress variation in the groove width of the primary pulley caused by a rapid variation in an input torque into the primary pulley (S17) while traveling in a fixed speed ratio mode (S14) in which the target speed ratio is held at a fixed value.Type: GrantFiled: October 2, 2006Date of Patent: August 16, 2011Assignee: Jatco LtdInventors: Hironori Nihei, Tetsuya Izumi, Seonjae Kim, Fumito Shinohara, Kiyotaka Sawano, Takuya Numata
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Patent number: 7922610Abstract: In a line pressure control device for a belt type continuously variable transmission according to this invention, when a line pressure is feedback-controlled to equal a target line pressure which is equal to or greater than the larger of oil pressures supplied to a primary pulley and a secondary pulley (S1), and it is determined that the target line pressure has fallen below a first low pressure, leading to a divergence between the target line pressure and the actual line pressure (S6), the target line pressure is restricted such that the target line pressure does not fall below a lower limit value (S7).Type: GrantFiled: October 4, 2006Date of Patent: April 12, 2011Assignee: JATCO LtdInventors: Hironori Nihei, Tetsuya Izumi, Seonjae Kim, Fumito Shinohara, Toshiyuki Shibuya, Toshiji Iida
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Patent number: 7892141Abstract: A speed ratio change control device for a belt type continuously variable transmission calculates a maximum thrust that can be generated by the primary pulley on the basis of an upper limit value of the line pressure, calculates an upper limit value of a shift speed on the basis of the maximum thrust, and sets the target speed ratio on the basis of the upper limit value of the shift speed.Type: GrantFiled: December 11, 2007Date of Patent: February 22, 2011Assignee: Jatco LtdInventors: Midori Yamaguchi, Fumito Shinohara, Yoshihisa Kodama
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Patent number: 7774120Abstract: A control apparatus for an automatic transmission includes a control section having a normal control section configured to actuate the step motor at a first speed by using a feedback control including an integral control in accordance with the target pulley ratio and the actual pulley ratio, a high speed control section configured to actuate the step motor at a second speed higher than the first speed by an open loop control based on the target pulley ratio, a judgment section configured to judge whether there is a high speed operation request, and a switch section configured to select the normal control performed by the normal control section at a normal condition, and to switch to the high speed control when a switch start condition is satisfied, the switch start condition including a first condition that the judgment section judges there is the high speed operation request.Type: GrantFiled: October 30, 2006Date of Patent: August 10, 2010Assignee: JATCO LtdInventors: Midori Yamaguchi, Yoshihisa Kodama, Tatsuya Ozone, Toshiji Iida, Fumito Shinohara, Toshiyuki Shibuya, Atsufumi Kobayashi, Yusuke Kimura
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Publication number: 20090240410Abstract: When a shift lever is shifted from an N range to a D range and a predetermined learning condition is established, a learning timer tm_pulse up to a point at which a pulse signal is detected by a primary pulley rotation speed sensor is calculated, and when a deviation between the learning timer tm_pulse and a reference correction amount ?P_offset is larger than a predetermined threshold ?t_pulse_dif, a learned correction amount P_offset is updated.Type: ApplicationFiled: February 12, 2009Publication date: September 24, 2009Inventors: Fumito Shinohara, Juhyun Nam, Katsumi Doihara, Hideaki Sasaki, Norio Asai, Hiroyasu Tanaka, Hideshi Wakayama, Takeshi Kaneda, Daisuke Aoki
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Publication number: 20080146409Abstract: This invention is a speed ratio change control device for a belt type continuously variable transmission that a maximum thrust that can be generated by the primary pulley is calculated on the basis of an upper limit value of the line pressure (S3), an upper limit value of a shift speed is calculated on the basis of the maximum thrust (S5), and the target speed ratio is set on the basis of the upper limit value of the shift speed (S9).Type: ApplicationFiled: December 11, 2007Publication date: June 19, 2008Inventors: Midori YAMAGUCHI, Fumito Shinohara, Yoshihisa Kodama
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Publication number: 20070099754Abstract: A control apparatus for an automatic transmission includes a control section having a normal control section configured to actuate the step motor at a first speed by using a feedback control including an integral control in accordance with the target pulley ratio and the actual pulley ratio, a high speed control section configured to actuate the step motor at a second speed higher than the first speed by an open loop control based on the target pulley ratio, a judgment section configured to judge whether there is a high speed operation request, and a switch section configured to select the normal control performed by the normal control section at a normal condition, and to switch to the high speed control when a switch start condition is satisfied, the switch start condition including a first condition that the judgment section judges there is the high speed operation request.Type: ApplicationFiled: October 30, 2006Publication date: May 3, 2007Inventors: Midori Yamaguchi, Yoshihisa Kodama, Tatsuya Ozone, Toshiji Iida, Fumito Shinohara, Toshiyuki Shibuya, Atsufumi Kobayashi, Yusuke Kimura
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Publication number: 20070082770Abstract: In a speed ratio control device for a belt continuously variable transmission according to this invention, when a speed ratio is subjected to feedback control on the basis of a difference between an actual speed ratio and a target speed ratio, pressure supplied to a primary pulley is corrected through feedforward (S17, S18) in order to suppress variation in the groove width of the primary pulley caused by a rapid variation in an input torque into the primary pulley (S17) while traveling in a fixed speed ratio mode (S14) in which the target speed ratio is held at a fixed value.Type: ApplicationFiled: October 2, 2006Publication date: April 12, 2007Inventors: Hironori Nihei, Tetsuya Izumi, Seonjae Kim, Fumito Shinohara, Kiyotaka Sawano, Takuya Numata
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Publication number: 20070082769Abstract: In a line pressure control device for a belt type continuously variable transmission according to this invention, when a line pressure is feedback-controlled to equal a target line pressure which is equal to or greater than the larger of oil pressures supplied to a primary pulley and a secondary pulley (S1), and it is determined that the target line pressure has fallen below a first low pressure, leading to a divergence between the target line pressure and the actual line pressure (S6), the target line pressure is restricted such that the target line pressure does not fall below a lower limit value (S7).Type: ApplicationFiled: October 4, 2006Publication date: April 12, 2007Inventors: Hironori Nihei, Tetsuya Izumi, Seonjae Kim, Fumito Shinohara, Toshiyuki Shibuya, Toshiji Iida