Patents by Inventor Toshiji Iida
Toshiji Iida 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: 8133140Abstract: A control apparatus for an automatic transmission includes a control section having a target secondary pressure setting section configured to set a target secondary pressure within a strength limit of the belt, and an operation switching section configured to switch a shift operation from a normal speed to a high speed higher than the normal speed when a predetermined condition is satisfied. The control section is configured to control the secondary pressure regulating valve by a feedback control based on the target secondary pressure and the actual secondary pressure sensed by the hydraulic pressure sensor. The target secondary pressure setting section is configured to modify the target secondary pressure by adding a predetermined quantity when a correction initiation condition is satisfied, the condition initiation including a first condition that the shift operation is performed at a high speed by switching of the operation switching section.Type: GrantFiled: October 30, 2006Date of Patent: March 13, 2012Assignee: Jatco LtdInventors: Midori Yamaguchi, Yoshihisa Kodama, Toshiji Iida, Toshiyuki Shibuya, Tatsuya Ozone
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Patent number: 7922610Abstract: In a line pressure control device for a belt type continuously variable transmission according to this invention, when a line pressure is feedback-controlled to equal a target line pressure which is equal to or greater than the larger of oil pressures supplied to a primary pulley and a secondary pulley (S1), and it is determined that the target line pressure has fallen below a first low pressure, leading to a divergence between the target line pressure and the actual line pressure (S6), the target line pressure is restricted such that the target line pressure does not fall below a lower limit value (S7).Type: GrantFiled: October 4, 2006Date of Patent: April 12, 2011Assignee: JATCO LtdInventors: Hironori Nihei, Tetsuya Izumi, Seonjae Kim, Fumito Shinohara, Toshiyuki Shibuya, Toshiji Iida
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Patent number: 7774120Abstract: A control apparatus for an automatic transmission includes a control section having a normal control section configured to actuate the step motor at a first speed by using a feedback control including an integral control in accordance with the target pulley ratio and the actual pulley ratio, a high speed control section configured to actuate the step motor at a second speed higher than the first speed by an open loop control based on the target pulley ratio, a judgment section configured to judge whether there is a high speed operation request, and a switch section configured to select the normal control performed by the normal control section at a normal condition, and to switch to the high speed control when a switch start condition is satisfied, the switch start condition including a first condition that the judgment section judges there is the high speed operation request.Type: GrantFiled: October 30, 2006Date of Patent: August 10, 2010Assignee: JATCO LtdInventors: Midori Yamaguchi, Yoshihisa Kodama, Tatsuya Ozone, Toshiji Iida, Fumito Shinohara, Toshiyuki Shibuya, Atsufumi Kobayashi, Yusuke Kimura
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Patent number: 7546196Abstract: In a line pressure control apparatus of a belt-drive CVT, a shift is achieved by varying V- groove widths of primary and secondary pulleys by a differential pressure between primary and secondary pulley pressures, originating from line pressure. The differential pressure is created by bringing a shift actuator, such as a step motor, into a control position corresponding to a target transmission ratio. The target transmission ratio is calculated based on a theoretical transmission ratio based on engine-and-vehicle operating conditions, taking account of a hardware response delay and a disturbance. The target transmission ratio is converted into a reference-model operative position, corresponding to a reference-model number-of-steps of the shift actuator. An actual transmission ratio is converted into an actual-transmission-ratio related operative position.Type: GrantFiled: October 4, 2005Date of Patent: June 9, 2009Assignee: JATCO LtdInventors: Tetsuya Izumi, Hironori Nihei, Seonjae Kim, Takayuki Tanaka, Toshiji Iida
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Patent number: 7509203Abstract: A lock-up clutch control device which controls a lock-up clutch provided in a torque converter installed between an engine and a transmission, is disclosed. The lock-up clutch control device changes over between a converter state and a lock-up state of the torque converter according to a differential pressure command value (LUprs) relating to a differential pressure supplied to the lock-up clutch. The lock-up clutch control device includes a differential pressure generating device (7, 8) which generates the differential pressure supplied to the lock-up clutch; input torque detection means (2, 14, 15) which detects an input torque (Te) to the torque converter; and a controller (1).Type: GrantFiled: March 25, 2005Date of Patent: March 24, 2009Assignees: Jatco Ltd, Nissan Motor Co., Ltd.Inventors: Tatsuya Imamura, Hiroshi Sekiya, Toshiji Iida, Koji Dohi, Satoshi Segawa
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Patent number: 7361120Abstract: A lock-up clutch control device which controls a lock-up clutch (6) provided in a torque converter (5) interposed between an engine (3) and a transmission (4) used with a vehicle, is disclosed. The lock-up clutch control device has a differential pressure generating device (7,8), a vehicle speed sensor (13), a throttle valve opening sensor (14), an transmission input shaft rotation speed sensor (16), engine torque detection means (2), and a controller (1). The controller (1) determines, based on the detected vehicle speed (VSP) and the detected throttle valve opening (TVO), whether or not a control region of a torque converter is a converter region wherein control is performed to disengage the lock-up clutch.Type: GrantFiled: September 30, 2005Date of Patent: April 22, 2008Assignee: Jatco LtdInventors: Toshiji Iida, Hiroshi Sekiya, Morimasa Yamawaki, Tatsuya Imamura, Koji Dohi, Kouji Saitou
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Patent number: 7328095Abstract: A lock-up clutch control device controls a lock-up clutch provided in a torque converter in a vehicle. The lock-up clutch control device includes a sensor for detecting a rise of a vehicle speed; a differential pressure generator which generates a differential pressure to lock the lock-up clutch; and a controller. The controller is programmed to command the differential pressure generator to lock the lock-up clutch when the vehicle speed exceeds a predetermined low vehicle speed, after the vehicle is started; subsequently monitor the rise of the vehicle speed; and command the differential pressure generator to unlock the lock-up clutch when the monitored rise of the vehicle speed is lower than a preset value.Type: GrantFiled: March 24, 2005Date of Patent: February 5, 2008Assignee: Jatco LtdInventors: Tatsuya Imamura, Hiroshi Sekiya, Toshiji Iida, Koji Dohi
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Patent number: 7287631Abstract: A lock-up clutch control device controls a lock-up clutch provided in a torque converter mounted between an engine and a transmission of a vehicle. The lock-up clutch control device switches between a converter state and a lock-up state by controlling a differential pressure supplied to the lock-up clutch. The lock-up clutch control device has a controller and a differential pressure generator for generating the differential pressure in response to a differential pressure command value. The controller calculates a first differential pressure command value which decreases at a predetermined rate, after the vehicle speed becomes a first predetermined speed; sets the differential pressure command value to a second differential pressure command value, before the vehicle speed becomes a second predetermined speed; and sets the differential pressure command value to a value at which the lock-up clutch is immediately released, when the vehicle speed becomes the second predetermined speed.Type: GrantFiled: March 24, 2005Date of Patent: October 30, 2007Assignees: JATCO Ltd, Nissan Motor Co., Ltd.Inventors: Tatsuya Imamura, Hiroshi Sekiya, Toshiji Iida, Koji Dohi, Nobuo Kurogo
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Publication number: 20070189510Abstract: Disclosed is a data collector that collects a first data string sent by a control unit to a network according to a predetermined format. The control unit has a first identification number, and the first data string includes the first identification number and a parameter which is used to control a vehicle or a vehicle component. The data collector includes a first collecting means for collecting the first data string sent by the control unit; and a second collecting means for collecting a second data string sent by a data converter. The data converter has a second identification number different from the first identification number of the control unit and the second data string conforms to the predetermined format. The data converter converts analog data sent from a sensor that detects a driving condition of the vehicle into digital data, puts the second identification number and the digital data in the second data string to be sent, and sends the second data string at a predetermined interval.Type: ApplicationFiled: August 29, 2005Publication date: August 16, 2007Inventors: Hiroyasu Tanaka, Takuichiro Inoue, Youhei Ishikawa, Yasuhiro Tani, Toshiji Iida
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Patent number: 7238142Abstract: In lock-up capacity control apparatus and method for a torque converter, the torque converter is caused to have a converter state in which a relative revolution between input and output elements of the torque converter is free of limitation in a case where a lock-up capacity (L/Uprso) during a no-load state is equal to or larger than a shock determining lock-up capacity (?), during an acceleration slip lock up in which the lock-up capacity of the torque converter is augmented by means of a time series control which accords with a load state of an engine, and the torque converter is caused to be oriented toward a lock-up state in which the relative revolution is zeroed by continuing an augmentation of the lock-up capacity by means of the time series control in a case where the lock-up capacity during the no-load state is smaller than the shock determining lock-up capacity.Type: GrantFiled: May 11, 2005Date of Patent: July 3, 2007Assignees: Nissan Motor Co., Ltd., JATCO LtdInventors: Nobuo Kurogo, Tatsuya Imamura, Kouji Saitou, Aki Hayakawa, Koji Dohi, Toshiji Iida, Hiroshi Sekiya
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Publication number: 20070142142Abstract: A control apparatus for an automatic transmission includes a control section having a target secondary pressure setting section configured to set a target secondary pressure within a strength limit of the belt, and an operation switching section configured to switch a shift operation from a normal speed to a high speed higher than the normal speed when a predetermined condition is satisfied. The control section is configured to control the secondary pressure regulating valve by a feedback control based on the target secondary pressure and the actual secondary pressure sensed by the hydraulic pressure sensor. The target secondary pressure setting section is configured to modify the target secondary pressure by adding a predetermined quantity when a correction initiation condition is satisfied, the condition initiation including a first condition that the shift operation is performed at a high speed by switching of the operation switching section.Type: ApplicationFiled: October 30, 2006Publication date: June 21, 2007Inventors: Midori Yamaguchi, Yoshihisa Kodama, Toshiji Iida, Toshiyuki Shibuya, Tatsuya Ozone
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Publication number: 20070099754Abstract: A control apparatus for an automatic transmission includes a control section having a normal control section configured to actuate the step motor at a first speed by using a feedback control including an integral control in accordance with the target pulley ratio and the actual pulley ratio, a high speed control section configured to actuate the step motor at a second speed higher than the first speed by an open loop control based on the target pulley ratio, a judgment section configured to judge whether there is a high speed operation request, and a switch section configured to select the normal control performed by the normal control section at a normal condition, and to switch to the high speed control when a switch start condition is satisfied, the switch start condition including a first condition that the judgment section judges there is the high speed operation request.Type: ApplicationFiled: October 30, 2006Publication date: May 3, 2007Inventors: Midori Yamaguchi, Yoshihisa Kodama, Tatsuya Ozone, Toshiji Iida, Fumito Shinohara, Toshiyuki Shibuya, Atsufumi Kobayashi, Yusuke Kimura
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Publication number: 20070082769Abstract: In a line pressure control device for a belt type continuously variable transmission according to this invention, when a line pressure is feedback-controlled to equal a target line pressure which is equal to or greater than the larger of oil pressures supplied to a primary pulley and a secondary pulley (S1), and it is determined that the target line pressure has fallen below a first low pressure, leading to a divergence between the target line pressure and the actual line pressure (S6), the target line pressure is restricted such that the target line pressure does not fall below a lower limit value (S7).Type: ApplicationFiled: October 4, 2006Publication date: April 12, 2007Inventors: Hironori Nihei, Tetsuya Izumi, Seonjae Kim, Fumito Shinohara, Toshiyuki Shibuya, Toshiji Iida
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Patent number: 7195581Abstract: A controller (5) performs open loop control of the engaging state of a lockup clutch (2) through a switching mechanism (3, 4) when a torque converter (1) transitions from a first state in which the lockup clutch (2) is disengaged to a second state in which the lockup clutch (2) is at least partially engaged. At this time, the controller (5) estimates the engine torque at the time when open loop control ends, estimates a necessary lockup capacity required for the converter (1) at the time when open loop control ends, based on the estimated engine torque, and controls the engaging state of the lockup clutch (2) through the switching mechanism (3, 4) to make the lockup capacity at the time when open loop control ends become the necessary lockup capacity.Type: GrantFiled: September 30, 2004Date of Patent: March 27, 2007Assignees: Nissan Motor Co., Ltd., Jatco LtdInventors: Satoshi Segawa, Kazutaka Adachi, Tatsuya Imamura, Kouji Saitou, Morimasa Yamawaki, Koji Dohi, Toshiji Iida, Hiroshi Sekiya
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Patent number: 7192288Abstract: A vehicle information collection device that is disposed in a compartment of a vehicle and collects vehicle information, comprising a cylindrical case (1), a connector (8) that is provided at one end of the case (1), for connection to the vehicle mounted computer (200), a main body (2) disposed inside the case (1), that transmits and receives a signal via the connector (8), and a lid (4) that closes the other end of the case (1). With this construction, the device can be easily disposed in the vehicle compartment.Type: GrantFiled: October 22, 2004Date of Patent: March 20, 2007Assignee: JATCO LtdInventors: Hiroyasu Tanaka, Toshiji Iida, Miki Kinoshita, Takashi Eguchi
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Publication number: 20060073924Abstract: In a line pressure control apparatus of a belt-drive CVT, a shift is achieved by varying V-groove widths of primary and secondary pulleys by a differential pressure between primary and secondary pulley pressures, originating from line pressure. The differential pressure is created by bringing a shift actuator, such as a step motor, into a control position corresponding to a target transmission ratio. The target transmission ratio is calculated based on a theoretical transmission ratio based on engine-and-vehicle operating conditions, taking account of a hardware response delay and a disturbance. The target transmission ratio is converted into a reference-model operative position, corresponding to a reference-model number-of-steps of the shift actuator. An actual transmission ratio is converted into an actual-transmission-ratio related operative position.Type: ApplicationFiled: October 4, 2005Publication date: April 6, 2006Inventors: Tetsuya Izumi, Hironori Nihei, Seonjae Kim, Takayuki Tanaka, Toshiji Iida
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Oil pressure reduction rate restricting apparatus for V-belt type continuously variable transmission
Patent number: 6980897Abstract: There is provided an oil pressure reduction rate restricting apparatus for a V-belt type continuously variable transmission, which is comprised of a reduction rate restricting section that calculates a reduction rate restricted secondary pressure and a reduction rate restricted primary pressure by restricting respective reduction rates of the target secondary pressure and the target primary pressure when the reduction rates of the target secondary pressure and the target primary pressure calculated by a target secondary pressure calculating section and a target primary pressure calculating section, respectively, are equal to or greater than respective predetermined values. The secondary pressure and the primary pressure are controlled based on the reduction rate restricted secondary pressure and the reduction rate restricted primary pressure whose reduction rates have been restricted such that the gradient thereof are small.Type: GrantFiled: September 17, 2003Date of Patent: December 27, 2005Assignee: Jatco LTDInventors: Takanori Aoki, Makoto Sawada, Masahiro Yamamoto, Midori Yamaguchi, Toshiji Iida -
Publication number: 20050261111Abstract: In lock-up capacity control apparatus and method for a torque converter, the torque converter is caused to have a converter state in which a relative revolution between input and output elements of the torque converter is free of limitation in a case where a lock-up capacity (L/Uprso) during a no-load state is equal to or larger than a shock determining lock-up capacity (?), during an acceleration slip lock up in which the lock-up capacity of the torque converter is augmented by means of a time series control which accords with a load state of an engine, and the torque converter is caused to be oriented toward a lock-up state in which the relative revolution is zeroed by continuing an augmentation of the lock-up capacity by means of the time series control in a case where the lock-up capacity during the no-load state is smaller than the shock determining lock-up capacity.Type: ApplicationFiled: May 11, 2005Publication date: November 24, 2005Inventors: Nobuo Kurogo, Tatsuya Imamura, Kouji Saitou, Aki Hayakawa, Koji Dohi, Toshiji Iida, Hiroshi Sekiya
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Publication number: 20050217957Abstract: A lock-up clutch control device controls a lock-up clutch (6) provided in a torque converter (5) which is mounted between the engine (3) and transmission (4) provided in a vehicle. The lock-up clutch control device switches between a converter state and a lock-up state of the torque converter by controlling a differential pressure supplied to the lock-up clutch. The lock-up clutch control device includes a sensor (13) which detects a vehicle speed; a differential pressure generator (7, 8) which generates the differential pressure supplied to the lock-up clutch in response to a differential pressure command value (Pt); and a controller (1).Type: ApplicationFiled: March 24, 2005Publication date: October 6, 2005Inventors: Tatsuya Imamura, Hiroshi Sekiya, Toshiji Iida, Koji Dohi, Nobuo Kurogo
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Patent number: D516441Type: GrantFiled: May 13, 2004Date of Patent: March 7, 2006Assignee: Jatco LTDInventors: Toshiji Iida, Miki Kinoshita, Hiroyasu Tanaka, Takashi Eguchi