Patents Assigned to JATCO
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Publication number: 20140324304Abstract: A transmission controller determines that a select operation has been performed from a reverse range to a drive range if a time during which a range other than the drive range has been selected is longer than a predetermined time threshold value and an input rotation speed of a transmission is lower than a predetermined rotation speed threshold value and determines that the select operation has been performed from a parking range or a neutral range to the drive range if the time during which the range other than the drive range has been selected is shorter than the time threshold value or the input rotation speed is higher than the rotation speed threshold value when the select operation has been performed from the range other than the drive range to the drive range during vehicle stop.Type: ApplicationFiled: October 4, 2012Publication date: October 30, 2014Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventor: Hiromichi Akebono
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Patent number: 8845478Abstract: To disable engine braking so as to act at a given shift stage in a D range selected manually, and to enable engine braking so as to act at the given shift stage in an L range, an automatic transmission includes first and second meshing mechanisms. The transmission further includes a one-way clutch, a first linkage for meshing the first meshing mechanism in synchronism with N-to-D movement, and a second linkage for meshing the second meshing mechanism in synchronism with D-to-L movement. A rotating part permits a driving force to be transmitted from an input member via the one-way clutch with the first meshing mechanism meshed in the D range and permits a driving force to be transmitted from the input member, without transmitting via the one-way clutch, with the first and second meshing mechanisms each meshed in the L range.Type: GrantFiled: December 20, 2011Date of Patent: September 30, 2014Assignee: Jatco LtdInventor: Kazuo Oguri
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Patent number: 8843287Abstract: A belt type continuously variable transmission mechanism has a primary pulley, a secondary pulley, and a belt, and a secondary hydraulic pressure controller to determine command secondary hydraulic pressure by feedback control based on the deviation between target secondary hydraulic pressure and actual hydraulic pressure, and control the secondary hydraulic pressure to the secondary pulley. The belt type continuously variable transmission mechanism further includes a belt slip control device to estimate a belt slip condition by monitoring the phase difference between an oscillation component included in the actual secondary hydraulic pressure and an oscillation component included in the actual transmission gear ratio and control the actual secondary hydraulic pressure to decrease based on the estimation so that a predetermined belt slip condition is maintained.Type: GrantFiled: April 30, 2009Date of Patent: September 23, 2014Assignees: Jatco Ltd, Nissan Motor Co., Ltd.Inventors: Katsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Masahiro Nishi, Keisuke Koyama, Kenta Nakamura, Kiyotaka Sawano, Hidemasa Kawaguchi
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Patent number: 8838350Abstract: When gear shift to second gear shift stage is completed and frictional engagement element is judged to be in slip state by slip state judging unit in a state in which input torque is input torque upper limit value, a value obtained by subtracting first predetermined amount from the input torque upper limit value is set as a decrease side input torque upper limit value. When next gear shift to the second gear shift stage is completed with the decrease side input torque upper limit value set and the frictional engagement element is not judged to be in slip state by the slip state judging unit in a state in which the input torque is the decrease side input torque upper limit value, a value obtained by adding second predetermined amount to the decrease side input torque upper limit value is set as a new input torque upper limit value.Type: GrantFiled: March 7, 2012Date of Patent: September 16, 2014Assignees: Jatco Ltd, Nissan Motor Co., Ltd.Inventor: Yukiyoshi Inuta
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Patent number: 8827850Abstract: When the vehicle is stationary, the gear ratio is shifted to a Low side by controlling the position of a shift actuator such that a shift control valve is controlled to a position in which a first oil pressure shifts toward a neutral position side by a predetermined amount from a maximum discharge side position and a controlling secondary pulley pressure control unit to increase a second oil pressure to a predetermined oil pressure.Type: GrantFiled: May 22, 2009Date of Patent: September 9, 2014Assignees: JATCO Ltd, Nissan Motor Co., Ltd.Inventors: Yoshihisa Kodama, Kazuya Okamoto, Hiroki Iwasa, Hiroyasu Tanaka
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Patent number: 8827656Abstract: Motor control apparatus for an electric oil pump includes the control command generating section configured to drive the motor control section by the first current command signal obtained from the fixed second target torque signal of the second signal generating section in a first stage, when the control command generating section receives the start command of the motor from the host control device when engine stops, to output the sum signal of the first current command signal and the second current command signal to the current control section, and to drive the motor control section by the third current command signal in a second stage, and to switch the output of the target torque switching section from the fixed second target torque signal to the first target torque signal of the first signal generating section in a third stage.Type: GrantFiled: September 12, 2011Date of Patent: September 9, 2014Assignees: JATCO Ltd, Nissan Motor Co., Ltd.Inventors: Yukihiro Sano, Ippei Suzuki, Yuukou Nojiri, Jyunichi Noda
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Patent number: 8825321Abstract: An automatic transmission control apparatus includes: a frictional engagement element; a hydraulic pressure supplying section configured to supply a hydraulic pressure to the frictional engagement element; a progression state judging section configured to judge a progression state of the engagement of the frictional engagement element; a rotational speed change rate control section configured to control the hydraulic pressure so that a change rate of a rotational speed of an input shaft of the automatic transmission becomes equal to a target change rate, from when the engagement of the frictional engagement element is started; and a rotational speed feedback control section configured to perform a feedback control of the hydraulic pressure so that the rotational speed of the input shaft of the automatic transmission becomes equal to a target rotational speed, from when the progression state judging section judges a predetermined progression state.Type: GrantFiled: July 22, 2010Date of Patent: September 2, 2014Assignees: JATCO Ltd, Nissan Motor Co., Ltd.Inventors: Koji Dohi, Minari Ishii
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Patent number: 8825347Abstract: A controller actuates an electrical oil pump when an idle stop condition or a coast stop condition holds and causes the actuation of the electrical oil pump to continue without being stopped until an accelerated state of a vehicle or a driver's intention to accelerate is determined even if the idle stop condition and the coast stop condition no longer holds thereafter.Type: GrantFiled: August 24, 2011Date of Patent: September 2, 2014Assignee: Jatco LtdInventors: Naohiro Yamada, Keichi Tatewaki, Shinichiro Watanabe, Noritaka Aoyama
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Patent number: 8825318Abstract: In a control device for an automatic transmission having a flow control mechanism that causes a part of a working oil discharged from a mechanical oil pump to flow into the mechanical oil pump when a differential pressure between an upstream side and a downstream side of a narrowed portion increases beyond a predetermined value, the narrowed portion being provided in a discharge passage through which the working oil discharged from the mechanical oil pump flows, a line pressure is raised when an oil temperature of the working oil is equal to or higher than a predetermined oil temperature and an engine torque is equal to or smaller than a predetermined engine torque.Type: GrantFiled: February 2, 2011Date of Patent: September 2, 2014Assignees: Jatco Ltd, Nissan Motor Co., Ltd.Inventors: Takashige Hinami, Masaki Watanabe, Yasutaka Kawamura, Kazuya Murota, Hirofumi Michioka
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Patent number: 8814735Abstract: Each steel element for a V-belt of a continuously variable transmission has a flank (4a) that comprises a plurality of equally spaced raised portions (41) each being placed between two fine grooves (42). A flat flatness ratio (FR) given by the equation (1) is set to the highest one of values that are capable of practically machining the flank (4a) of the steel element (4) and capable of causing the flank (4a) to exhibit a given and satisfied lubrication oil discharging effect, and a groove pitch (GP) that is a distance between the two fine grooves (42) is set to a value that is capable of practically machining the flank of the steel element and capable of causing the flank to exhibit a given and satisfied lubrication oil discharging effect. The groove pitch thus set is a value that is permitted by the higher value of the flatness ratio thus set. FR (%)=WRP/(WRP+WG)×100??(1) wherein: FR: Flatness ratio WRP: Width of the raised portion (41) WG: Width of the groove (42).Type: GrantFiled: May 7, 2009Date of Patent: August 26, 2014Assignee: Jatco LtdInventors: Kouhei Toyohara, Kazuhiro Mizumiya, Yoshitaka Miura, Tsutomu Kamitani, Shinji Kiyohara
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Patent number: 8813599Abstract: A gear structure comprising: a reinforcement member fixed onto a side surface of a gear; and a fixation section configured to fix the reinforcement member onto the side surface of the gear, the fixation section being provided on a line of contact action of the gear.Type: GrantFiled: March 8, 2011Date of Patent: August 26, 2014Assignee: JATCO Ltd.Inventor: Yoshitaka Miura
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Patent number: 8818657Abstract: The shift control unit shifts the sub-transmission mechanism while changing the speed ratio of the variator in response to a change in the speed ratio of the sub-transmission mechanism so that the through speed ratio does not change after the through speed ratio is caused to reach the final through speed ratio by changing only the speed ratio of the variator if the speed ratio corresponding to the shift instruction from the driver is between a first speed ratio at which the sub-transmission mechanism is in the second gear position at the high speed side and the speed ratio of the variator is lowest and a second speed ratio at which the sub-transmission mechanism is in the first gear position at the low speed side and the speed ratio of the variator is highest when the manual mode is selected.Type: GrantFiled: August 24, 2011Date of Patent: August 26, 2014Assignee: Jatco LtdInventors: Hiroyasu Tanaka, Masahide Ito, Masato Mori, Takashi Eguchi, Ryousuke Nonomura, Seiichiro Takahashi, Mamiko Inoue
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Patent number: 8814534Abstract: Oil supply apparatus having an electric motor, an oil pump driven by the electric motor and supplying oil to a transmission, an oil temperature sensor detecting oil temperature, and a controller setting a drive torque value and controlling the electric motor so that the electric motor outputs a drive torque according to a detection oil temperature. The controller is configured to perform rotation speed control of the electric motor so that when judging that there is a possibility that the detection oil temperature and oil temperature close to the oil pump are different at electric motor starting, the electric motor rotates at a lower rotation speed than where the electric motor rotates by the drive torque value according to the detection oil temperature before performing the electric motor control by which the electric motor outputs the drive torque according to the detection oil temperature.Type: GrantFiled: September 7, 2011Date of Patent: August 26, 2014Assignees: Jatco Ltd, Nissan Motor Co., Ltd.Inventor: Naoyasu Ikeda
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Patent number: 8818654Abstract: Engine output control apparatus has shift range detecting section detecting shift range of automatic transmission; vehicle speed detecting section detecting vehicle speed; engine output state detecting section detecting engine output state; and controller. The controller performs (a) judgment control judging that torque converter is in a stall state if following judgment conditions (i) to (iii) are satisfied, (i) shift range is drive range, (ii) vehicle speed is equal to or less than predetermined vehicle speed, (iii) engine is in a high output state, (b) cumulation control cumulating a period of agreement of the judgment conditions if the judgment conditions are satisfied, and (c) output suppression control suppressing output of the engine if a control start condition is satisfied by cumulation of the agreement period. The control start condition is set so that as the vehicle speed becomes higher, start of the output suppression control is more delayed.Type: GrantFiled: March 5, 2013Date of Patent: August 26, 2014Assignee: JATCO LtdInventors: Takashi Koguchi, Kazunori Sugiura, Shin Tsukamoto, Shohei Imaji, Yoshiyuki Egawa
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Patent number: 8812204Abstract: In an oil pump control apparatus of a vehicle includes a first driving power source for propelling the vehicle, a first oil pump driven by the first driving power source, a second oil pump driven by a second driving power source, and a hydraulically-operated portion supplied with working oil from the first and second pumps, a look-ahead vehicle speed estimation section is provided for estimating, based on a vehicle running condition, a look-ahead vehicle speed, which may occur a given elapsed time later. Also provided is a second-oil-pump control section configured to predict, based on the look-ahead vehicle speed, whether a lack in discharge pressure produced by the first pump from a required hydraulic pressure, and further configured to start up the second pump, when it is predicted that a lack in discharge pressure of the first pump from the required hydraulic pressure occurs.Type: GrantFiled: October 5, 2010Date of Patent: August 19, 2014Assignees: JATCO Ltd, Nissan Motor Co., Ltd.Inventors: Takateru Kawaguchi, Shigeki Shimanaka
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Patent number: 8812208Abstract: A control apparatus of a hybrid vehicle provided with an engine, a motor, an automatic transmission performing a shift by engaging/disengaging a plurality of engagement elements, a first clutch arranged between the engine and the motor for transmitting/cutting a driving force between the engine and the motor and a second clutch arranged between the motor and driving wheels for transmitting/cutting a driving force from the motor to the driving wheels, has a slip control section that controls the second clutch to a slip state during the shift of the automatic transmission. In a case of a successive shift in which a current shift and a succeeding shift are successively performed, the slip control section gradually increases an engagement pressure of the second clutch when changing the slip state of the second clutch to a fully engaged state after the current shift is completed and before the succeeding shift is completed.Type: GrantFiled: January 30, 2012Date of Patent: August 19, 2014Assignee: Jatco LtdInventors: Masami Suzuki, Fumihiro Yamanaka
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Patent number: 8801413Abstract: A helical gear pump includes a second helical gear provided coaxially with a drive helical gear, a third helical gear engaged with the second helical gear and provided on a third shaft different from a shaft of the drive helical gear and a shaft of a driven helical gear, and a bearing for supporting the third shaft and receiving a thrust force.Type: GrantFiled: November 4, 2010Date of Patent: August 12, 2014Assignee: JATCO LtdInventor: Masami Matsubara
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Patent number: 8798839Abstract: A hybrid vehicle control device is provided with an engine, a motor/generator, a first clutch, an automatic transmission, a second clutch, and a controller having a simultaneous process selection control section. The simultaneous process selection control section performs engine startup control and downshift control in parallel in cases where the torque outputtable by the motor subsequent to downshifting during overlap of an engine startup request and a downshift request is equal to or greater than the engine startup torque, or performs engine startup control first then downshift control in cases where the torque outputtable by the motor subsequent to downshifting is less than the engine startup torque.Type: GrantFiled: January 27, 2012Date of Patent: August 5, 2014Assignees: Nissan Motor Co., Ltd., JATCO Ltd.Inventors: Fumihiro Yamanaka, Masami Suzuki
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Patent number: 8798838Abstract: A control device of a hybrid vehicle includes an engine, a motor/generator, a first clutch, an automatic transmission, a second clutch, and startup/shifting simultaneous processing section. When engine speed increase control for increasing the engine speed by the motor/generator in order to start up the engine during travel and downshifting control of the automatic transmission are processed in parallel, the startup/shifting simultaneous processing section uses the motor torque of the motor/generator to increase the increase of input speed by the downshifting control to a target input speed while engine speed increase control is being performed by the motor/generator.Type: GrantFiled: January 27, 2012Date of Patent: August 5, 2014Assignees: Nissan Motor Co., Ltd., JATCO Ltd.Inventors: Fumihiro Yamanaka, Masami Suzuki
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Publication number: 20140215300Abstract: An FT diagram aid device is provided with an import portion for obtaining a connection relationship of ruled lines and character strings from first data which is data of an FT diagram expressing a tree structure by the ruled lines and the character strings on a sheet of a spreadsheet program, acquiring an event included in the FT diagram and a connection relationship between events from an obtained connection relationship of the ruled lines and the character strings, and generating second data describing the tree structure of the FT diagram in a markup language based on the same and an editing portion for editing the second data to generate third data describing the tree structure of the edited FT diagram in the markup language.Type: ApplicationFiled: September 6, 2012Publication date: July 31, 2014Applicant: JATCO Ltd.Inventors: Katsunari Yamamoto, Youji Hiraoka, Yoshiyuki Furukawa