Patents Assigned to JATCO
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Publication number: 20160097450Abstract: A transmission including a variator capable of continuously changing a speed ratio, a stepped transmission mechanism arranged in series with the variator and in which a gear position is switched and a shilling control unit executing stepped shifting repeatedly performing a shifting suppression phase and an upshift phase when a stepped upshift shifting condition is satisfied is provided, and the shifting control unit completes a change from an n-th gear position of the stepped transmission mechanism to an n+1 gear position if the stepped transmission mechanism is at the n-th gear position before the through speed ratio reaches a Highest speed ratio of the variator when the stepped shifting is performed.Type: ApplicationFiled: May 20, 2014Publication date: April 7, 2016Applicant: JATCO LtdInventors: Masashi SATO, Hideshi WAKAYAMA, Mamiko INOUE, Kousuke WAKU, Hyuk PARK
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Patent number: 9291245Abstract: The first planetary gear set is configured to integrally rotate by a first clutch. The first element is coupled with the fifth element. The second element is configured to be locked through a first brake to a stationary section and configured to be coupled through a second clutch with the ninth element. The third element is coupled with the input shaft. The fourth element is configured to be coupled through a third clutch with the ninth element. The sixth element is locked to the stationary section. The seventh element is configured to be locked through a second brake to the stationary section. The eighth element is coupled with an output shaft. The ninth element is coupled with the twelfth element. The tenth element is configured to be coupled through a fourth clutch with the output shaft. The eleventh element is coupled with the input shaft.Type: GrantFiled: November 16, 2012Date of Patent: March 22, 2016Assignee: JATCO LTDInventors: Toru Takeuchi, Shoji Sugaya, Kazuo Oguri, Kenichi Watanabe, Kazuaki Aota, Yukiyoshi Inuta, Takayuki Okuda, Joerg Mueller, Rico Resch, Mirko Leesch
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Patent number: 9284910Abstract: A vehicle control device for controlling a vehicle includes a drive source control unit adapted to output a command for automatically stopping a drive source when a first predetermined condition is satisfied and output a command for restarting the drive source when a second predetermined condition is not satisfied after the command for automatically stopping the drive source is output, a drive source restart determination unit adapted to determine that the drive source has restarted when a third predetermined condition is satisfied after the command for restarting the drive source is output, and a restart determination prohibition unit adapted to prohibit a restart determination by the drive source restart determination unit at least until the third predetermined condition is no longer satisfied when the third predetermined condition is satisfied and the command for restarting the drive source is output.Type: GrantFiled: December 4, 2012Date of Patent: March 15, 2016Assignee: JATCO LTDInventors: Keichi Tatewaki, Masayuki Miyazono, Hideshi Wakayama
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Patent number: 9279496Abstract: A frictional engagement element (32) that disconnects power between an engine (1) and a drive wheel (7) in a vehicle, and a control unit (11, 12) that controls a transmission ratio of a continuously variable transmission (4) and the frictional engagement element (32), are provided. When the transmission ratio is not a maximum transmission ratio at a vehicle stop when a vehicle speed is 0, the control unit (11, 12) operates the transmission ratio to the maximum transmission ratio while controlling the frictional engagement element (32) into a slip state. Further, at this time, when a road is an upward slope, the control unit (11, 12) sets an engagement pressure of the frictional engagement element (32) and an engine torque according to the road slope, prevents slide-down of the vehicle.Type: GrantFiled: April 1, 2013Date of Patent: March 8, 2016Assignee: JATCO LTDInventors: Youngjoo Woo, Jongkeun Lim, Junseok Choi, Changnam Park, MyongSeog Chang
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Publication number: 20160047443Abstract: An automatic transmission for a vehicle includes: the input shaft being constantly connected to the second element, arranged to be connected to the second sun gear by an engagement of the first clutch, and arranged to be engaged with the third sun gear by an engagement of the second clutch, the output member being constantly connected to the second ring gear, the first element being arranged to be fixed to the stationary portion by an engagement of the first brake, the third element being constantly connected to the second pinion carrier, and arranged to fixed to the stationary portion by an engagement of the second brake, and the third sun gear being arrange to be fixed to the stationary portion by an engagement of the third brake.Type: ApplicationFiled: January 7, 2014Publication date: February 18, 2016Applicant: JATCO LTDInventors: Kenichi WATANABE, Shoji SUGAYA, Kazuo OGURI, Masao ARIMATSU, Jun SHINOZAKI, Yoshiaki HATANO
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Publication number: 20160047470Abstract: A control device for a belt-type continuously variable transmission CVT includes an engine 1, a belt-type continuously-variable transmitting mechanism 4; a forward/reverse switching mechanism 3 including a forward clutch 31 and a reverse brake 32; and a hydraulic control circuit 71 configured to control a pulley hydraulic pressure and engagement-element pressures for the forward clutch 31 and the reverse brake 32. The control device includes a selection control means for outputting a pulley hydraulic command to obtain an idle-time clamping pressure which is higher than an idle-time minimum pressure (idle-time MIN-pressure) calculated from an input torque, to the hydraulic control circuit 71, when the engine 1 is in operation during a selection of N-range. A position of an element clearance generated in the belt can be maintained even if drag torque is inputted.Type: ApplicationFiled: November 28, 2013Publication date: February 18, 2016Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Daisuke AOKI, Takahiro KOBAYASHI, Seiichiro TAKAHASHI, Yuta SUZUKI
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Patent number: 9255638Abstract: The object of the invention is to impart a suitable target slip amount depending on a state of change in an output from a driving power source to a torque converter, while simplifying control. A controller has a calculation part for calculating an engine torque change rate that is a rate of change in the output, and a target slip addition amount calculation part for calculating a negative value as an addition amount, when the engine torque change rate is less than or equal to a predetermined value that is a positive value, and for calculating a positive value as the addition amount, when the engine torque change rate is greater than the predetermined value. The controller is configured to set the target slip amount of a lockup clutch by arithmetic processing that integrates the addition amount, determined based on the calculated engine torque change rate, every control period.Type: GrantFiled: November 5, 2012Date of Patent: February 9, 2016Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Morimasa Yamawaki, Tatsuya Hayashi, Yuzuru Tohta
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Publication number: 20160025212Abstract: A vehicle control device for controlling a vehicle with a drive source automatic stop unit for automatically stopping a drive source when a predetermined automatic stop condition is satisfied and an electrical oil pump to be driven during an automatic stop of the drive source includes a drive prohibition time calculation unit configured to calculate a drive prohibition time of the electrical oil pump on the basis of a heat generation amount of the electrical oil pump, and a drive prohibition unit configured to prohibit the drive of the electrical oil pump until the drive prohibition time elapses from the end of the drive of the electrical oil pump.Type: ApplicationFiled: March 3, 2014Publication date: January 28, 2016Applicant: JATCO LTDInventor: Yoshinobu KAWAMOTO
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Publication number: 20160009273Abstract: A hybrid vehicle includes a mechanical oil pump that is driven by an engine and an electric oil pump that is driven by an electric motor, and is configured to activate the electric oil pump when traveling in an electric traveling mode, in which the engine is stopped and traveling is executed by a driving force from a driving motor.Type: ApplicationFiled: March 14, 2014Publication date: January 14, 2016Applicants: NISSAN MOTOR CO., LTD., JATCO LTDInventors: Morihiro NAGAMINE, Akira TAKANO, Shintaro OSHIO, Takuro HIRANO, Yoshihisa KODAMA, Akihiro YAMAMOTO
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Patent number: 9234584Abstract: An automatic transmission has an automatic shift mode and a manual shift mode. When an opposite manual operation is performed, during an automatic shift based on a shift map in the automatic shift mode, in an opposite direction opposite to the automatic shift or when the opposite manual operation is performed, during a forced shift performed regardless of the manual operation in the manual shift mode, in the opposite direction opposite to the forced shift, a control apparatus forbids a shift based on a first manual operation and permits a shift based on a second or subsequent manual operation in the opposite direction opposite to the automatic shift or the forced shift.Type: GrantFiled: August 3, 2011Date of Patent: January 12, 2016Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Katsuhiro Matsuo, Keizo Ishida
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Patent number: 9222579Abstract: A belt-drive continuously variable transmission including a lock mechanism for locking a primary moveable sheave of a primary pulley in a highest transmission ratio position. The lock mechanism includes a fixed side axial groove extending on an outer circumferential surface of a primary fixed sheave shaft, a moveable side axial groove extending on an inner circumferential surface of a primary moveable sheave sleeve, an intervening member disposed between the axial grooves, an axial tapered groove formed as a part of at least one of the axial grooves which is disposed corresponding to a highest transmission ratio, and an intervening member displacement limiting member arranged to limit an amount of displacement of the intervening member relative to the primary fixed sheave shaft along the fixed side axial groove or the moveable side axial groove.Type: GrantFiled: March 7, 2012Date of Patent: December 29, 2015Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventor: Yoichi Tsuji
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Patent number: 9222524Abstract: A drive force transmission device includes a clutch operatively interposed between a hub member and a drum member to selectively transmit drive power therebetween. A first rotating shaft member is coupled to the hub member to rotate with the hub member. A second rotating shaft member is coupled to a separating wall part of the drum member to rotate with the drum member. A support member rotatably supports the second rotating shaft member via a bearing. The support member includes a restriction part that restricts axial movement of an outer race of the bearing. A bottom portion of the separating wall part is a radially offset towards the bearing space with respect to a top portion of the separating wall so that the bottom portion radial overlaps with the restriction part as viewed perpendicular to a rotational axis of the drum member.Type: GrantFiled: November 5, 2012Date of Patent: December 29, 2015Assignees: Nissan Motor Co., Ltd., JATCO LtdInventors: Katsuyuki Saito, Kazuhiro Miyachi, Kazutoshi Shimozono, Kiyoto Tamura, Yutaka Yoshikawa, Akihisa Kawai
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Publication number: 20150360682Abstract: There is provided a control apparatus for an automatic transmission AT into which driving forces from driving sources including an engine Eng and a motor/generator MG are inputted. The control apparatus includes: a second brake B2 engaged in a D range; an engagement start determining section (steps S2?S3?S4); and a determination inhibit section (steps S2?S5?S6). The engagement start determining section determines that second brake B2 has started the engagement in a case where a load of the motor/generator MG is increased by a predetermined quantity during the revolution number control and when the D range is selected and second brake B2 in the release state is engaged. The determination inhibit section inhibits the engagement start determination in a case where a switching from an HEV mode to an EV mode occurs.Type: ApplicationFiled: November 14, 2013Publication date: December 17, 2015Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Kenichi OOSHIMA, Hiroki MATSUI
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Publication number: 20150362049Abstract: A multi-disc transmission includes a primary disc provided on an input shaft, a secondary disc provided on an output shaft, the secondary disc including a disc overlap region overlapping the primary disc, a pair of pressing rollers arranged in the disc overlap region with the primary disc and the secondary disc interposed there between, the pair of pressing rollers being supported on shaft portions via needle bearings, a shifting actuator configured to move the pair of pressing rollers between the input shaft and the output shaft, and a pressing mechanism configured to press the pair of pressing rollers against the primary disc and the secondary disc by causing a pressing force to act on the pair of pressing rollers.Type: ApplicationFiled: October 29, 2013Publication date: December 17, 2015Applicant: JATCO LTDInventor: Hiroshi TANGE
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Patent number: 9212742Abstract: A control method for a belt-type continuously variable transmission is provided for performing a belt slip control. The method includes oscillating hydraulic pressure and monitoring a phase difference calculated based on a multiplication value of an oscillation component in an actual hydraulic pressure and an oscillation component in an actual variable speed ratio to estimate a belt slip condition. The method further includes controlling hydraulic pressure to maintain a predetermined belt slip condition by reducing the hydraulic pressure to be lower than a hydraulic pressure in a normal control time based on an estimation, and limiting an input torque-change rate in which an input torque to the belt-type continuously variable transmission changes in an increasing direction until the hydraulic pressure rises to a hydraulic pressure in which the input torque is not excessive relative to a belt clamp force.Type: GrantFiled: April 30, 2009Date of Patent: December 15, 2015Assignees: NISSAN MOTOR CO., LTD., JATCO LTDInventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa
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Patent number: 9212732Abstract: A target primary pressure and a target secondary pressure are set based on a speed ratio, a target line pressure as a target value of a line pressure is set to be a value obtained by adding an offset amount, as a positive value, to either one having a higher value out of the target primary pressure and the target secondary pressure, in at least a cross-point region as a region where an absolute value of a deviation, obtained by subtracting the target primary pressure from the target secondary pressure, is smaller than a predetermined deviation, and a primary pressure, a secondary pressure, and the line pressure are controlled to be the target primary pressure, the target secondary pressure, and the target line pressure, respectively.Type: GrantFiled: February 21, 2013Date of Patent: December 15, 2015Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Tomoyuki Mizuochi, Hisao Nobu, Kenji Sakakibara, Takahiro Ikeda, Masayuki Shimizu, Masami Sakai
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Patent number: 9206803Abstract: An oil pump apparatus for supplying an oil to a vehicular transmission, includes a pump to suck the oil from an oil reservoir through an inlet port into a pumping chamber, and an intake circuit to convey the oil sucked from the oil reservoir to the inlet port. The intake circuit includes a proximal segment, an intermediate segment and a distal segment. The proximal segment extends from the inlet port, to the intermediate segment. The intermediate segment extends upwards from the proximal segment. The distal segment extends downwards from a first connecting end portion connected with the intermediate segment to a end portion formed with an suction opening to suck the oil from the oil reservoir into the intake circuit.Type: GrantFiled: May 27, 2011Date of Patent: December 8, 2015Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Keichi Tatewaki, Akio Nonomura, Yasuhiro Kawachi
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Publication number: 20150345634Abstract: In a transmission comprising a driving force source, an oil pressure source that generates oil pressure lifting a driving force from the driving force source, a first power transmission unit having a first mechanical biasing mechanism, and a second power transmission unit having a second mechanical biasing mechanism, opening/closing unit is provided in an oil passage through which the oil pressure is supplied to the second power transmission unit in order to close the oil passage until the oil pressure supplied to the first power transmission unit reaches or exceeds a predetermined value.Type: ApplicationFiled: December 25, 2013Publication date: December 3, 2015Applicant: JATCO LTDInventors: Keichi TATEWAKI, Hideshi WAKAYAMA, Kousuke WAKU, Noritaka AOYAMA
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Patent number: 9199631Abstract: A coast stop vehicle for stopping a drive source during vehicle running includes a power transmission means arranged between the drive source and drive wheels, a coast stop control means for executing a coast stop control to stop the drive source when a coast stop condition for stopping the drive source holds during the vehicle running, an electrical oil pump for supplying oil to the power transmission means during the coast stop control, a slip detection means for detecting a slip in the power transmission means during the coast stop control, and an electrical oil pump control means for causing the electrical oil pump to discharge a second discharge pressure higher than a first discharge pressure set before the slip in the power transmission means occurs when the slip occurs in the power transmission means during the coast stop control.Type: GrantFiled: May 10, 2012Date of Patent: December 1, 2015Assignee: JATCO LTDInventors: Keichi Tatewaki, Hideshi Wakayama, Naohiro Yamada
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Patent number: 9194471Abstract: An automatic transmission includes a continuously variable transmission mechanism, a planetary gear mechanism, a clutch causing an input shaft and a first rotation element to be engaged, a coupling member which transmits rotation of the input shaft to the first rotation element, and a brake which locks rotation of a third rotation element. The input shaft is coupled to an input unit. An output shaft is coupled to a second rotation element An output unit is coupled to a fourth rotation element. The constant speed ratio of the coupling member is so set that a rotation direction of the output shaft relative to the fourth rotation element changes from a forward direction to a reverse direction according to a change in a speed ratio of the continuously variable transmission mechanism when the clutch is engaged and the brake is released.Type: GrantFiled: February 16, 2012Date of Patent: November 24, 2015Assignee: JATCO LTDInventor: Kazuo Oguri