Patents by Inventor Seiji Masunaga
Seiji Masunaga 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: 9371905Abstract: A torque sharing rate is set as a constraint of a motion equation of an automatic transmission by using a gear shift model in which gear shift target values are set by two values of a torque on a rotating member on an output shaft side and a rotation speed variation of a rotating member on an input shaft side. In addition, a first gear shift according to the gear shift control and a second gear shift that uses a gear shift model in which the gear shift target value is set using only the velocity variation of the rotating member on the input shaft side to enable a speedier gear shift than the first gear shift are selectively executed.Type: GrantFiled: January 13, 2014Date of Patent: June 21, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keisuke Ota, Yoshio Hasegawa, Seiji Masunaga
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Patent number: 9333973Abstract: A speed change control system for reducing shift shocks of clutch-to-clutch shifting is provided. The control system is applied to a vehicle in which a transmission having engagement devices is connected to an output side of a prime mover, and in which a gear stage of the transmission is shifted among a plurality of stages by changing engagement states of the engagement devices. The speed change control system carries out a clutch-to-clutch shifting from a predetermined gear stage to another gear stage by reducing a torque capacity of the predetermined engagement device to be disengaged while increasing a torque capacity of another engagement device to be engaged.Type: GrantFiled: May 8, 2012Date of Patent: May 10, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji Masunaga, Yoshio Hasegawa, Seiji Kuwahara, Nobufusa Kobayashi
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Patent number: 9315193Abstract: A speed change control system for reducing shift shocks of clutch-to-clutch shifting is provided. The control system is applied to a vehicle in which a transmission having a plurality of engagement devices is connected to an output side of a prime mover, and in which a gear stage of the transmission is shifted among a plurality of stages by changing engagement states of the engagement devices. The speed change control system is configured to carry out a clutch-to-clutch shifting of the gear stage from a predetermined gear stage to another gear stage by gradually reducing a torque capacity of the predetermined engagement device to be disengaged while gradually increasing a torque capacity of another engagement device to be engaged.Type: GrantFiled: May 8, 2012Date of Patent: April 19, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji Masunaga, Yoshio Hasegawa, Seiji Kuwahara, Nobufusa Kobayashi
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Publication number: 20150369362Abstract: With a hydraulic control operation amount generation apparatus for an automatic transmission and a control apparatus for an automatic transmission, a control operation amount at which any desired target packing control execution time can be realized is generated on a hydraulic model by determining formulae of the 2n?2 constraint conditions corresponding to the n hydraulic control phases relating to the packing control of the engagement devices.Type: ApplicationFiled: June 18, 2015Publication date: December 24, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takayuki ANDO, Masami KONDO, Seiji MASUNAGA, Shogo TSUGE
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Patent number: 9188220Abstract: In a gear shift control apparatus for a vehicle, since a torque sharing rate is set as a constraint for a motion equation for an automatic transmission, suitable control in torque delivery, which is considered difficult in gear shift control, can be implemented and also the motion equation can be solved. Furthermore, when at least four control operation amounts must be determined in order to achieve two gear shift target values, another engaging device is classified into any of an engaging-side clutch and a releasing-side clutch depending on how another clutch torque acts on progress of a gear shift, hence in addition to achieving torque sharing in accordance with a torque sharing rate between the engaging-side clutch and the releasing-side clutch, torque sharing among a plurality of engaging devices classified into a same side can be arbitrarily set. As a result, the respective control operation amounts can be determined.Type: GrantFiled: January 3, 2014Date of Patent: November 17, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji Masunaga, Yoshio Hasegawa, Keisuke Ota
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Publication number: 20150276051Abstract: An automatic transmission shifting control including: a shifting target value calculating portion setting shifting target values, torque of a rotary-member on the output shaft side, and rate of change of rotating speed of a rotary-member on the input shaft side; a manipulated calculating portion setting manipulated amounts, a torque of the rotary-member on the input shaft side, a torque capacity of one coupling device engaging for a transmission shifting-action, and torque capacity of other coupling devices releasing the shifting-action; a torque assignment ratio calculating portion setting torque assignment ratios to transfer through the respective coupling devices to engage and release the shifting-action; when a second-shifting-action is required during a preceding first-shifting-action according to a first-shifting-model, the manipulated calculating portion switching the first-shifting-model corresponding to the first-shifting-action to a second-shifting-model corresponding to the second-shifting-action,Type: ApplicationFiled: November 16, 2012Publication date: October 1, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shogo Tsuge, Seiji Masunaga, Yoshio Hasegawa, Keisuke Ota
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Publication number: 20150260280Abstract: Torque shares that express an exchange of torque are set as a constraint condition of an equation of motion of an automatic transmission, so it is suitable to control an exchange of torque between engagement devices, which is difficult in shift control, and it is possible to solve the equation of motion. In other words, it is possible to handle any shift pattern with the use of a predetermined shift model. Furthermore, at the time of a shift in which two elements are released and two elements are engaged, a first shift and a second shift in each of which one element is released and one element is engaged are carried out, so three control operation amounts are used in each of the first shift and the second shift, with the result that it is possible to solve the equation of motion.Type: ApplicationFiled: January 3, 2014Publication date: September 17, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji MASUNAGA, Yoshio HASEGAWA, Keisuke OTA
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Publication number: 20150252891Abstract: In a gear shift control apparatus for a vehicle, since a torque sharing rate is set as a constraint for a motion equation for an automatic transmission, suitable control in torque delivery, which is considered difficult in gear shift control, can be implemented and also the motion equation can be solved. Furthermore, when at least four control operation amounts must be determined in order to achieve two gear shift target values, another engaging device is classified into any of an engaging-side clutch and a releasing-side clutch depending on how another clutch torque acts on progress of a gear shift, hence in addition to achieving torque sharing in accordance with a torque sharing rate between the engaging-side clutch and the releasing-side clutch, torque sharing among a plurality of engaging devices classified into a same side can be arbitrarily set. As a result, the respective control operation amounts can be determined.Type: ApplicationFiled: January 3, 2014Publication date: September 10, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji Masunaga, Yoshio Hasegawa, Keisuke Ota
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Publication number: 20150184740Abstract: The present invention executes a desired gear shift of an automatic transmission using gear shift modeling even when there are three control inputs to two target gear shift values. Setting torque share ratio as a constraint on the equation of motion for the automatic transmission is suitable for controlling the transfer of engaging unit torque, which is considered to be difficult in variable speed control, and allows solving of the equation of motion. Viewed from a different angle, because the torque share ratio, which represents the torque transfer, has been set as a constraint, any gear shift pattern can be handled with a single gear shift model.Type: ApplicationFiled: July 31, 2012Publication date: July 2, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji Masunaga, Yoshio Hasegawa, Keisuke Ota
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Publication number: 20150120155Abstract: A speed change control system for reducing shift shocks of clutch-to-clutch shifting is provided. The control system is applied to a vehicle in which a transmission having engagement devices is connected to an output side of a prime mover, and in which a gear stage of the transmission is shifted among a plurality of stages by changing engagement states of the engagement devices. The speed change control system carries out a clutch-to-clutch shifting from a predetermined gear stage to another gear stage by reducing a torque capacity of the predetermined engagement device to be disengaged while increasing a torque capacity of another engagement device to be engaged.Type: ApplicationFiled: May 8, 2012Publication date: April 30, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji Masunaga, Yoshio Hasegawa, Seiji Kuwahara, Nobufusa Kobayashi
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Publication number: 20150120154Abstract: A speed change control system for reducing shift shocks of clutch-to-clutch shifting is provided. The control system is applied to a vehicle in which a transmission having a plurality of engagement devices is connected to an output side of a prime mover, and in which a gear stage of the transmission is shifted among a plurality of stages by changing engagement states of the engagement devices. The speed change control system is configured to carry out a clutch-to-clutch shifting of the gear stage from a predetermined gear stage to another gear stage by gradually reducing a torque capacity of the predetermined engagement device to be disengaged while gradually increasing a torque capacity of another engagement device to be engaged.Type: ApplicationFiled: May 8, 2012Publication date: April 30, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji Masunaga, Yoshio Hasefawa, Seiji Kuwahara, Nobufusa Kobayashi
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Patent number: 8977452Abstract: In a vehicle control, an automatic transmission is shifted using a predetermined shift model, which determines control operation amounts for achieving shift target values, by setting the shift target values on the basis of a torque on an output shaft-side rotating member and a speed variation amount of an input shaft-side rotating member, setting the control operation amounts on the basis of a torque on the input shaft-side rotating member, a torque capacity of an engaged-side engagement device during shifting and a torque capacity of a released-side engagement device during shifting and setting torque shares of a transmission torque between the engaged-side engagement device and the released-side engagement device during shifting when the transmission torque is converted to the torque on the input shaft-side rotating member, and timing at which the torque shares are varied is changed on the basis of a shift pattern.Type: GrantFiled: August 5, 2013Date of Patent: March 10, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Seiji Masunaga, Yoshio Hasegawa, Keisuke Ota
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Publication number: 20150012159Abstract: A speed change control system for a hybrid vehicle comprised of a first motor-generator, a differential mechanism that distributes a power of an engine to the first motor-generator and to an output member and that changes an engine speed in accordance with a speed of the first motor-generator, and a second motor-generator that exchanges a torque with any of wheels.Type: ApplicationFiled: February 7, 2012Publication date: January 8, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyuki Honda, Hitoshi Matsunaga, Souitirou Shimura, Seiji Masunaga, Munehiro Katsumata
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Patent number: 8784245Abstract: A drive system includes a transmission mechanism that establishes a plurality of gear positions comprising a first-speed through sixth-speed gear positions and a reverse-drive gear position, by switching among change gear trains and coupling a first driveshaft to an output member, and also includes a lock clutch that switches a power distribution mechanism between a locked state in which a ring gear and a carrier are coupled to each other and are inhibited from rotating in a differential fashion, and a released state in which the inhibition of the differential rotation is cancelled.Type: GrantFiled: June 2, 2009Date of Patent: July 22, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yukihiko Ideshio, Shigeru Okuwaki, Hiroyuki Shibata, Tomohito Ono, Seiji Masunaga, Makoto Funahashi
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Publication number: 20140200778Abstract: A torque sharing rate is set as a constraint of a motion equation of an automatic transmission by using a gear shift model in which gear shift target values are set by two values of a torque on a rotating member on an output shaft side and a rotation speed variation of a rotating member on an input shaft side. In addition, a first gear shift according to the gear shift control and a second gear shift that uses a gear shift model in which the gear shift target value is set using only the velocity variation of the rotating member on the input shaft side to enable a speedier gear shift than the first gear shift are selectively executed.Type: ApplicationFiled: January 13, 2014Publication date: July 17, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keisuke OTA, Yoshio HASEGAWA, Seiji MASUNAGA
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Publication number: 20140046560Abstract: In a vehicle control, an automatic transmission is shifted using a predetermined shift model, which determines control operation amounts for achieving shift target values, by setting the shift target values on the basis of a torque on an output shaft-side rotating member and a speed variation amount of an input shaft-side rotating member, setting the control operation amounts on the basis of a torque on the input shaft-side rotating member, a torque capacity of an engaged-side engagement device during shifting and a torque capacity of a released-side engagement device during shifting and setting torque shares of a transmission torque between the engaged-side engagement device and the released-side engagement device during shifting when the transmission torque is converted to the torque on the input shaft-side rotating member, and timing at which the torque shares are varied is changed on the basis of a shift pattern.Type: ApplicationFiled: August 5, 2013Publication date: February 13, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Seiji MASUNAGA, Yoshio HASEGAWA, Keisuke OTA
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Publication number: 20110111910Abstract: A drive system includes a transmission mechanism that establishes a plurality of gear positions comprising a first-speed through sixth-speed gear positions and a reverse-drive gear position, by switching among change gear trains and coupling a first driveshaft to an output member, and also includes a lock clutch that switches a power distribution mechanism between a locked state in which a ring gear and a carrier are coupled to each other and are inhibited from rotating in a differential fashion, and a released state in which the inhibition of the differential rotation is cancelled.Type: ApplicationFiled: June 2, 2009Publication date: May 12, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukihiko Ideshio, Shigeru Okuwaki, Hiroyuki Shibata, Tomohito Ono, Seiji Masunaga, Makoto Funahashi