Patents by Inventor Itaru SHINOHARA
Itaru 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: 10364888Abstract: A control device for a continuously variable transmission includes: a line pressure generating-section configured to generate a line pressure; a pilot valve configured to supply a pilot pressure regulated so as not to exceed a first predetermined pressure when the line pressure exceeds the first predetermined pressure; a control section configured to generate the clamping forces by controlling the pilot pressure; a line pressure increase section configured to increase the line pressure to be greater than the first predetermined pressure when the control to increase the line pressure is performed when the line pressure is lower than the first predetermined pressure.Type: GrantFiled: May 28, 2015Date of Patent: July 30, 2019Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Tomoaki Honma, Yuta Suzuki, Itaru Shinohara, Hiroshi Sekiya, Hiromu Ogino
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Patent number: 10252719Abstract: A control device for a continuously variable transmission includes a lock-up clutch of a torque converter which is arranged to connect and disconnect a power transmission between a power source and the driving wheel, and a control section configured to output a hydraulic pressure command value. The control section is configured to control a transmission gear ratio of the continuously variable transmission and an engagement state of the lock-up clutch in accordance with a traveling state of a vehicle. The control device includes a learning control section configured to perform a learning control of the engagement state of the lock-up clutch with respect to the hydraulic pressure command value, an oil vibration sensing section configured to sense oil vibration of a line pressure, and a learning control prohibiting section configured to prohibit the learning control when the oil vibration sensing section senses the oil vibration.Type: GrantFiled: May 27, 2015Date of Patent: April 9, 2019Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Tomoaki Honma, Yuta Suzuki, Itaru Shinohara, Hiroshi Sekiya, Hiromu Ogino
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Patent number: 10125864Abstract: A control device for a lock-up-clutch installed in a torque converter arranged between an engine and an automatic transmission mechanism includes an engagement control means that carries out a calculation to increase an engaging capacity of the lock-up-clutch with the passage of time during an engagement control time in which the torque converter is shifted from a converter condition to a lock-up condition in which the prime mover drives an auxiliary device and in which when, during the control to increase the engaging capacity of the lock-up-clutch, an input torque to the torque converter from the engine is increased due to reduction in load of the auxiliary device, the engagement control means promotes the increase of the engaging capacity of the lock-up-clutch based on the amount of increase of the input torque thereby eliminating undesired pressure shortage that would be induced in the period toward the lock-up condition.Type: GrantFiled: June 22, 2015Date of Patent: November 13, 2018Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Tomoaki Honma, Kohei Kamiya, Yuta Suzuki, Itaru Shinohara, Hiroshi Sekiya, Hiromu Ogino, Yasuhiro Endo, Yuzuru Tohta, Kouki Saitou
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Patent number: 9995389Abstract: A continuously variable transmission (100), wherein pressure equalization control is performed to make line pressure (PL) equal to secondary pressure (Psec) when prescribed start conditions are satisfied. During pressure equalization control, a secondary pressure indicated value (Psec_co) is raised by a prescribed amount (S10), then a line pressure indicated value (PL_co) is gradually decreased (S30). If determination is made that line pressure is the same as the secondary pressure after secondary actual pressure (Psec) is lowered (S40), then the line pressure is controlled so that the secondary actual pressure (Psec) becomes the secondary pressure indicated value (Psec_co) (S50). At the start of pressure equalization control, if the difference (?Psec) found by subtracting the secondary pressure indicated value from the secondary actual value is negative (S120), then a primary pressure indicated value is corrected on the basis of the difference (S130).Type: GrantFiled: October 23, 2015Date of Patent: June 12, 2018Assignees: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Tomoaki Honma, Yuta Suzuki, Itaru Shinohara
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Patent number: 9939063Abstract: A control device for a continuously variable transmission includes: a line pressure generating means configured to generate a line pressure; a pilot valve configured to supply a pilot pressure regulated so as not to exceed a first predetermined pressure when the line pressure exceeds the first predetermined pressure; a control means configured to control solenoid valves by the pilot pressure, and thereby to generate belt clamping forces; an oil vibration sensing means configured to sense an oil vibration; and a line pressure increase means configured to increase the line pressure to be greater than the first predetermined pressure when the oil vibration sensing means senses the oil vibration.Type: GrantFiled: May 27, 2015Date of Patent: April 10, 2018Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Tomoaki Honma, Yuta Suzuki, Itaru Shinohara, Hiroshi Sekiya, Hiromu Ogino
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Publication number: 20170321802Abstract: A continuously variable transmission (100), wherein pressure equalization control is performed to make line pressure (PL) equal to secondary pressure (Psec) when prescribed start conditions are satisfied. During pressure equalization control, a secondary pressure indicated value (Psec_co) is raised by a prescribed amount (S10), then a line pressure indicated value (PL_co) is gradually decreased (S30). If determination is made that line pressure is the same as the secondary pressure after secondary actual pressure (Psec) is lowered (S40), then the line pressure is controlled so that the secondary actual pressure (Psec) becomes the secondary pressure indicated value (Psec_co) (S50). At the start of pressure equalization control, if the difference (?Psec) found by subtracting the secondary pressure indicated value from the secondary actual value is negative (S120), then a primary pressure indicated value is corrected on the basis of the difference (S130).Type: ApplicationFiled: October 23, 2015Publication date: November 9, 2017Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Seiichiro TAKAHASHI, Tomoaki HONMA, Yuta SUZUKI, Itaru SHINOHARA
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Publication number: 20170211701Abstract: A control device for a continuously variable transmission includes: a line pressure generating means configured to generate a line pressure; a pilot valve configured to supply a pilot pressure regulated so as not to exceed a first predetermined pressure when the line pressure exceeds the first predetermined pressure; a control means configured to control solenoid valves by the pilot pressure, and thereby to generate belt clamping forces; an oil vibration sensing means configured to sense an oil vibration; and a line pressure increase means configured to increase the line pressure to be greater than the first predetermined pressure when the oil vibration sensing means senses the oil vibration.Type: ApplicationFiled: May 27, 2015Publication date: July 27, 2017Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Tomoaki HONMA, Yuta SUZUKI, Itaru SHINOHARA, Hiroshi SEKIYA, Hiromu OGINO
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Publication number: 20170204968Abstract: A control device for a lock-up-clutch installed in a torque converter arranged between an engine and an automatic transmission mechanism includes an engagement control means that carries out a calculation to increase an engaging capacity of the lock-up-clutch with the passage of time during an engagement control time in which the torque converter is shifted from a converter condition to a lock-up condition in which the prime mover drives an auxiliary device and in which when, during the control to increase the engaging capacity of the lock-up-clutch, an input torque to the torque converter from the engine is increased due to reduction in load of the auxiliary device, the engagement control means promotes the increase of the engaging capacity of the lock-up-clutch based on the amount of increase of the input torque thereby eliminating undesired pressure shortage that would be induced in the period toward the lock-up condition.Type: ApplicationFiled: June 22, 2015Publication date: July 20, 2017Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Tomoaki HONMA, Kohei KAMIYA, Yuta SUZUKI, Itaru SHINOHARA, Hiroshi SEKIYA, Hiromu OGINO, Yasuhiro ENDO, Yuzuru TOHTA, Kouki SAITOU
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Publication number: 20170204970Abstract: A control device for a continuously variable transmission includes: a line pressure generating-section configured to generate a line pressure; a pilot valve configured to supply a pilot pressure regulated so as not to exceed a first predetermined pressure when the line pressure exceeds the first predetermined pressure; a control section configured to generate the clamping forces by controlling the pilot pressure; a line pressure increase section configured to increase the line pressure to be greater than the first predetermined pressure when the control to increase the line pressure is performed when the line pressure is lower than the first predetermined pressure.Type: ApplicationFiled: May 28, 2015Publication date: July 20, 2017Applicants: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Tomoaki HONMA, Yuta SUZUKI, Itaru SHINOHARA, Hiroshi SEKIYA, Hiromu OGINO
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Publication number: 20170197623Abstract: A control device for a continuously variable transmission includes: a lock-up clutch of a torque converter which is arranged to connect and disconnect a power transmission between a power source and the driving wheel; a control section configured to output a hydraulic pressure command value, and to control a transmission gear ratio of the continuously variable transmission and an engagement state of the lock-up clutch in accordance with a traveling state of a vehicle; a learning control section configured to perform a learning control of the engagement state of the lock-up clutch with respect to the control command value; an oil vibration sensing section configured to sense an oil vibration; and a learning control prohibiting section configured to prohibit the learning control when the oil vibration sensing section senses the oil vibration.Type: ApplicationFiled: May 27, 2015Publication date: July 13, 2017Applicants: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Tomoaki HONMA, Yuta SUZUKI, Itaru SHINOHARA, Hiroshi SEKIYA, Hiromu OGINO