Patents Assigned to JATCO
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Patent number: 10808840Abstract: A transmission control device controls a CVT installed in a vehicle. The device has, as modes for the CVT, a CVT mode M1 for changing a transmission gear ratio steplessly based on the operating state of the vehicle, and a stepped transmission mode M2 for changing the transmission gear ratio stepwise based on the operating state of the vehicle. The device includes a transmission mode switching control unit (controller) 12 for controlling switching between the CVT mode M1 and the stepped transmission mode M2 based on an actual accelerator opening. The transmission mode switching control unit (controller) 12 performs switching from the CVT mode M1 to the stepped transmission mode M2, if the actual accelerator opening reaches or exceeds a first threshold value T1 set in a plurality of stages so as to increase stepwise in accordance with an increase in a vehicle speed.Type: GrantFiled: October 10, 2018Date of Patent: October 20, 2020Assignees: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, JATCO LTDInventors: Noritaka Aoyama, Azusa Shimoda, Masataka Ohtsuka, Ken Hirashita, Nobuhiko Morifuji, Mitsuki Ishizuka, Hiromasa Masuda, Yukinobu Sakakibara
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Patent number: 10801613Abstract: Provided is a lock-up clutch control device of a vehicle in which a torque converter with a lock-up clutch is disposed between an engine and a transmission. This control device has a coasting capacity learning control section configured to decrease a LU differential pressure command value for the lock-up clutch during accelerator release operation and, when a slip of the lock-up clutch is detected during decrease of the LU differential pressure command value, update the LU differential pressure command value at the time of detection of the slip as a LU differential pressure learning value balanced with a coasting torque. The coasting capacity learning control section is further configured to, when operation of the PTC heater intervenes during coasting capacity learning control, correct the LU differential pressure command value by adding thereto a LU differential pressure correction value that corresponds to an increase of input torque to the lock-up clutch.Type: GrantFiled: May 19, 2017Date of Patent: October 13, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventor: Kohei Kamiya
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Publication number: 20200318736Abstract: A controller changes a shift line of the continuously variable transmission to a high rotation side when execution of automatic brake is detected during sailing stop which stops the engine while driving the vehicle.Type: ApplicationFiled: April 12, 2017Publication date: October 8, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventor: Yusuke OOTA
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Patent number: 10793156Abstract: A vehicle control device is for a vehicle having a drive source, and an automatic transmission connected to the drive source, the automatic transmission having an engagement element for disconnecting/connecting transmission of a driving force and a variator placed further upstream than the engagement element. The vehicle control device includes first and second control units. The first control unit is configured to execute sailing stop control to stop the drive source and to put the automatic transmission into a neutral state when a sailing stop condition is established. The second control unit is configured to start the drive source and to implement downshifting of the variator when a size of a deceleration level is a prescribed value or greater when the sailing stop control is cancelled due to a prescribed sailing stop cancellation condition among sailing stop cancellation conditions being established, and to engage the engagement element after the downshifting.Type: GrantFiled: September 27, 2016Date of Patent: October 6, 2020Assignee: Jatco Ltd.Inventors: Yukifumi Ootsuka, Masayoshi Nakasaki, Yoshimasa Nishihiro
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Patent number: 10794481Abstract: A continuously variable transmission is mounted in a vehicle, and includes a primary pulley, a secondary pulley, and a belt, wherein the belt is wound around the primary pulley and the secondary pulley. A control device performs a low speed position return control by a feedback control employing a control input integral component. The low speed position return control is to control a transmission ratio to a final target transmission ratio for lower speed position while the vehicle is decelerating. The control device performs a limiting control in response to a condition that the transmission ratio has reached the final target transmission ratio during the low speed position return control. The limiting control is to limit the control input integral component based on thrust balance between the primary pulley and the secondary pulley so as to maintain the transmission ratio at the final target transmission ratio.Type: GrantFiled: December 26, 2017Date of Patent: October 6, 2020Assignee: JATCO LTDInventor: Iori Oota
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Publication number: 20200300357Abstract: A transmission control device controls a CVT installed in a vehicle. The device has, as modes for the CVT, a CVT mode M1 for changing a transmission gear ratio steplessly based on the operating state of the vehicle, and a stepped transmission mode M2 for changing the transmission gear ratio stepwise based on the operating state of the vehicle. The device includes a transmission mode switching control unit (controller) 12 for controlling switching between the CVT mode M1 and the stepped transmission mode M2 based on an actual accelerator opening. The transmission mode switching control unit (controller) 12 performs switching from the CVT mode M1 to the stepped transmission mode M2, if the actual accelerator opening reaches or exceeds a first threshold value T1 set in a plurality of stages so as to increase stepwise in accordance with an increase in a vehicle speed.Type: ApplicationFiled: October 10, 2018Publication date: September 24, 2020Applicants: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, JATCO LtdInventors: Noritaka AOYAMA, Azusa SHIMODA, Masataka OHTSUKA, Ken HIRASHITA, Nobuhiko MORIFUJI, Mitsuki ISHIZUKA, Hiromasa MASUDA, Yukinobu SAKAKIBARA
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Patent number: 10753467Abstract: In a transmission control device, a controller determines failure of one of a variator input side rotation sensor and a variator output side rotation sensor. A hydraulic control circuit and the controller variably control line pressure, and in a case where the failure is determined, fix the line pressure to a predetermined value or more. The hydraulic control circuit and the controller variably control a speed ratio of a variator by a double pressure regulation method, and in a case where the failure is determined, variably control the speed ratio of the variator by a single pressure regulation method.Type: GrantFiled: February 9, 2016Date of Patent: August 25, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Haruka Ozono, Masahiro Hamano
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Patent number: 10753466Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a specific section. The controller variably controls line command pressure and secondary command pressure, and in a case where the failure is determined, fixes the line command pressure to a line pressure set value and the secondary command pressure to a secondary pressure set value. In a case where the failure is determined, the controller further starts a change in the secondary command pressure after start of a change in the line command pressure, and controls the secondary command pressure in such a manner that the secondary command pressure takes a first predetermined time to have the secondary pressure set value.Type: GrantFiled: February 17, 2016Date of Patent: August 25, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Haruka Ozono, Youji Itou, Kosuke Abe
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Publication number: 20200263781Abstract: A driving force transmission device includes: a gear; a case receiving the gear; a baffle plate positioned between a side surface of the gear and the case, the baffle plate including a downstream side end portion positioned at a most downstream position in a rotation direction of the gear, the case including a rib protruding toward the downstream side end portion, a clearance positioned between a surface of the rib and a surface of the baffle plate, the rib including a linear portion crossing a rotation direction of the gear.Type: ApplicationFiled: November 1, 2018Publication date: August 20, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Mitsuhiro AKIYAMA, Shogo FUJII, Tahei TOYOSHIMA, Masakazu TAMURA
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Publication number: 20200263782Abstract: A power transmission device includes: a gear; a case receiving the gear; and a baffle plate positioned between the gear and the case; the baffle plate including a guide portion arranged to guide an oil scooped up by the gear, into between the baffle plate and the case, and the guide portion being disposed above an oil level within the case, the guide portion being adjacent to an axial side surface of the gear, the guide portion being positioned in the baffle plate on an upstream side in a rotation direction of the gear, and the guide portion including a first bent portion which is positioned on a tip end side, and which is bent in a direction from the case toward the gear.Type: ApplicationFiled: November 1, 2018Publication date: August 20, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Tahei TOYOSHIMA, Shingo YAMAMOTO, Kazuyuki HANDA, Masaki SHIBUYA, Tomohiro NAGATA, Masakazu TAMURA, Atsuyuki IDE, Yasuyuki HORIE, Hideyuki MAMIYA, Akira KAKIMI
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Patent number: 10746294Abstract: A control device for a continuously variable transmission includes a belt type continuously variable transmission and a controller. The controller is configured to calculate an actual gear shift ratio based on rotation speed sensor values from a primary rotation speed sensor and a secondary rotation speed sensor, and to perform gear shift ratio control using feedback control to converge the actual gear shift ratio to a target gear shift ratio. The controller is further configured to stop calculation of the actual gear shift ratio when one of the rotation speed sensor values is less than a first threshold value determined based on a lower limit value of sensor detection accuracy, and stop calculation of the actual gear shift ratio even when one of the rotation speed sensor values is the first threshold value or greater, when a deceleration level of the drive wheel is a prescribed deceleration level or greater.Type: GrantFiled: July 27, 2017Date of Patent: August 18, 2020Assignees: JATCO LTD., NISSAN MOTOR CO., LTD.Inventors: Naoyasu Ikeda, Geunseok Ryu
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Patent number: 10746290Abstract: A lockup control device for a vehicle includes: a torque converter, and a lockup control configured to increase a lockup pressure difference command to an initial pressure difference, when a turbine rotation speed variation amount of the torque converter becomes smaller than a predetermined value during a ramp control in which the lockup pressure difference command is increased by a ramp pressure difference, the lockup control section being configured to switch to a second increase gradient having an increase gradient lower than a first increase gradient of the ramp pressure difference when the turbine rotation speed variation amount is equal to or greater than the predetermined value.Type: GrantFiled: January 31, 2017Date of Patent: August 18, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Takahiro Yamada, Kunihiro Takahashi, Syunsuke Iwamoto, Yuji Okamoto, Toshiaki Noda
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Publication number: 20200254994Abstract: A control device for a vehicle includes a drive shaft, an engagement element, an engine coupled via the engagement element, an electric motor coupled without via the engagement element, and a control unit that instructs a reengagement of the engagement element when an accelerator pedal opening increases to equal to or more than a predetermined degree of opening during switching of driving sources in which an engagement capacity of the engagement element is decreased while a torque of the electric motor is increased, and increases the torque of the electric motor to more than the torque of the electric motor before the accelerator pedal opening increases to equal to or more than the predetermined degree of opening until the engagement capacity of the engagement element starts increasing.Type: ApplicationFiled: August 30, 2018Publication date: August 13, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Yoshimasa NISHIHIRO, Masaharu MOCHIZUKI, Takashi ENOMOTO
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Publication number: 20200248802Abstract: A vehicle includes a transmission having a variator and a sub-transmission mechanism, a controller serving as a shift control unit adapted to, as shift of the transmission, shift the sub-transmission mechanism and the variator so that a through speed ratio becomes a target speed ratio, and an engine serving as a torque increasing portion adapted to increase a torque inputted to the transmission in association with the shift of the transmission. The controller has a torque setting unit adapted to make a magnitude of an inclination larger as an increase amount of the engine rotation speed in association with the shift of the transmission is larger.Type: ApplicationFiled: July 30, 2018Publication date: August 6, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Seiya KITAGAWA, Tomoaki HONMA
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Patent number: 10731757Abstract: The controller performs shift control of the transmission such that an actual pressure of a primary pressure becomes an indicating pressure. The controller includes a phase advance compensator which performs advance compensation of the indicating pressure, and a setting unit which sets an indicating pressure on which the advance compensation is performed by the phase advance compensator as the indicating pressure, in accordance with at least one of a rotation speed of a primary pulley, an input torque to a secondary pulley, a speed ratio, or a changing rate.Type: GrantFiled: February 27, 2017Date of Patent: August 4, 2020Assignee: JATCO LTDInventors: Takurou Kawasumi, Ken Okahara, Midori Yamaguchi, Masahiro Yamamoto, Hiroki Iwasa, Hiroki Kumashiro, Masayuki Shimizu, Ryuuichi Furukawa, Kenichi Mori, Kazutaka Adachi, Yutaka Kaneko, Hiroyuki Ashizawa
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Patent number: 10731751Abstract: A control device for an automatic transmission of a vehicle includes a shift control section including; a deceleration state judging section configured to judge whether a deceleration of the vehicle is a gentle deceleration state or a sudden deceleration state, and a downshift control section configured to command a plural stage downshift to downshift from a current shift stage of the automatic shift mechanism to a target shift stage that is lower than the current shift stage by two stages or more when the deceleration state judging section judges the sudden deceleration state.Type: GrantFiled: July 19, 2017Date of Patent: August 4, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Kunihiko Okumura, Takeshi Fujii
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Publication number: 20200240516Abstract: A CVT is provided with a primary pulley (1) and a secondary pulley (2) between which a belt (3) is wound, and hydraulic pressure control valves (5, 6, 7) which control pulley hydraulic pressures. A CVT controller (8) sets a base current indicated value to be output to solenoids (5a, 6a, 7a) of the hydraulic pressure control valves (5, 6, 7), on the basis of a pulley hydraulic pressure indicated value. A dither control unit (58) of the CVT controller (8) superimposes a dither current onto the base current indicated value to be output to the solenoids (5a, 6a, 7a) if, during pulley hydraulic pressure control, the situation is determined, on the basis of belt slip determination information, to be such that belt slipping is highly likely to occur.Type: ApplicationFiled: November 13, 2018Publication date: July 30, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventor: Junki MATSUI
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Publication number: 20200238974Abstract: A control device for a vehicle having a drive shaft, an engagement element, an engine connected to the drive shaft via the engagement element, and an electric motor connected to the drive shaft not via the engagement element includes a control portion adapted to stop the engine after a maintaining period in which the engine is maintained at predetermined rotation speed during travel of the vehicle. The a control portion gradually decreases an engagement volume of the engagement element while gradually increasing a power generation load of the electric motor during the maintaining period to disengage the engagement element, and stops the engine after disengagement of the engagement element.Type: ApplicationFiled: July 27, 2018Publication date: July 30, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Yutaka SHIMIZU, Masayoshi NAKASAKI
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Patent number: 10724630Abstract: In a control apparatus for an automatic transmission, in a drive train, a driving source and the automatic transmission having a plurality of gear-shift stages including the gear-shift stages at each of which a one way clutch is engaged during a drive are equipped, a gear-shift line correction by such coast correction lines as to provide such gear-shift line shapes projecting toward a lower vehicle speed side in a small accelerator opening area is added to up-shift lines of the gear-shift stages at each of which the one way clutch participates from among the gear-shift lines after the correction by vehicle speed correction lines.Type: GrantFiled: February 9, 2016Date of Patent: July 28, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Shunsuke Ogasawara, Hiroaki Shiokawa, Yuichiro Matsunaga
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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