Patents by Inventor Shigeki Takami
Shigeki Takami 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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Publication number: 20070107960Abstract: A hybrid drive apparatus including an input shaft; a first motor and a second motor; a power distributing planetary gear; an intermediate transmission shaft; and a partition wall provided between a motor part including the first motor and the second motor and a transmission part including the transmission such that the intermediate shaft passes through the partition wall.Type: ApplicationFiled: October 26, 2006Publication date: May 17, 2007Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shigeki Takami, Tomoo Atarashi, Hirotaka Yata, Makoto Iwanaka, Takuma Kakinami, Yasuo Hojo, Masahiro Kojima, Ryuji Ibaraki, Atsushi Tabata, Yuji Iwase, Tooru Matsubara, Hiroyuki Shibata
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Publication number: 20070107961Abstract: An electric vehicle drive control device that includes a first electric motor; a second electric motor; a differential device that includes first, second, and third rotational elements, wherein the first rotational element is connected to the first electric motor, the second rotational element is connected to the second electric motor via a transmission shaft, and the third rotational element is connected to an engine; a transmission for shifting that shifts a speed of a rotation transferred to from the transmission shaft; and a controller that: controls electric motor control processing means for controlling a rotation speed of the first electric motor in conjunction with shifting performed by the transmission; and adjusts electric power adjustment processing means for adjusting an electric power consumptions generated in the first and second electric motors, by controlling an output supplied to the second electric motor in conjunction with the control of the rotation speed of the first electric motor.Type: ApplicationFiled: October 26, 2006Publication date: May 17, 2007Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Makoto Iwanaka, Shigeki Takami, Ryuji Ibaraki, Tooru Matsubara, Hiroyuki Shibata
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Publication number: 20070103106Abstract: An electric vehicle drive control device includes a first electric motor; a second electric motor; a differential device that includes first, second, and third rotational elements, wherein the first rotational element is connected to the first electric motor, the second rotational element is connected to the second electric motor via a transmission shaft, and the third rotational element is connected to an engine; a transmission that shifts a speed of a rotation transferred from the transmission shaft; and a controller that: calculates an inertia compensating torque that compensates for a change in a rotation speed caused by inertia while the transmission performs shifting; and corrects a target torque for the first electric motor in accordance with the inertia compensating torque.Type: ApplicationFiled: October 26, 2006Publication date: May 10, 2007Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Makoto Iwanaka, Shigeki Takami, Ryuji Ibaraki, Tooru Matsubara, Hiroyuki Shibata
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Publication number: 20060276288Abstract: A hybrid drive unit including two electric motors is provided which is capable of providing continuously variable transmission, and prevents deterioration in energy recovery efficiency, without causing deterioration in power transmission efficiency in a high-vehicle speed and low-driving force range. In order to achieve shifting through a planetary gear unit and three friction engagement elements, first and third power transmission states are formed such that an input shaft is connected to a first rotating element of the planetary gear unit, a first electric motor is connected to a second rotating element, and an output shaft and a second electric motor are connected to a third rotating element, and a second power transmission state is formed such that the input shaft, the output shaft, the first electric motor and the second electric motor are independently connected to four rotating elements of the planetary gear unit.Type: ApplicationFiled: June 1, 2006Publication date: December 7, 2006Applicant: AISIN AW CO., LTD.Inventors: Makoto Iwanaka, Shigeki Takami
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Patent number: 7089095Abstract: A control unit for a hybrid vehicle includes a take-off detection unit that detects a start of movement of the hybrid vehicle from a stopped state; and a torque control unit that limits a engine torque input to an automatic transmission from becoming excessive by generating negative torque using a regeneration operation of a motor on occasions when the start of running of the hybrid vehicle is detected by the take-off detection unit. Accordingly, it is possible to reliably inhibit problems, such as an occupant of the hybrid vehicle being caused to feel an unpleasant jolt due to torque transmitted to a driven wheel side increasing instantaneously as a result of change in an application state of a clutch during the start of movement.Type: GrantFiled: December 22, 2003Date of Patent: August 8, 2006Assignee: Aisin AW Co., LtdInventors: Shigeki Takami, Takeshi Inuzuka, Yasuhiko Kobayashi, Yoshitaka Murase, Yoichi Tajima, Takayuki Kubo, Takahiro Kido
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Patent number: 7017348Abstract: A control device for a hybrid vehicle, the hybrid vehicle including a motor, connected to an engine output shaft, to which an engine output is transmitted, and an automatic transmission, the automatic transmission including an input shaft, connected to the engine output shaft, and an output shaft, connected to a driving wheel, the control device including a request output detection unit that detects a driver's requested output; an engine control unit that controls the engine output; a motor control unit that controls motor output so that total output of the motor output and the engine output becomes the driver's requested output; and a limitation request output unit that, when the driver's request output is larger than input-available driving force to the input shaft of the automatic transmission, outputs a limitation request to limit the total output to limitation output, which is smaller than or equal to the input-available driving force, wherein the motor control unit, when the limitation request is outputType: GrantFiled: March 19, 2004Date of Patent: March 28, 2006Assignee: Aisin AW Co., Ltd.Inventors: Yoichi Tajima, Yoshitaka Murase, Takayuki Kubo, Takeshi Inuzuka, Yasuhiko Kobayashi, Shigeki Takami, Takahiro Kido
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Patent number: 7011603Abstract: A fluid pressure control device including a torque converter that is placed between a output shaft of an engine and an input shaft of a transmission, a mechanical oil pump that is driven by the output shaft, a clutch that directly engages the output shaft and the input shaft by employing an engagement pressure based on a fluid pressure that is generated by the mechanical oil pump, an electric oil pump that can supply a fluid pressure to the clutch, and a control unit for controlling the electric oil pump, wherein when the engagement pressure based on the fluid pressure that is generated by the mechanical oil pump is an amount below a necessary engagement pressure that is necessary to engage the clutch, the control unit drives the electric oil pump so as to supply a fluid pressure by at least the amount to the clutch.Type: GrantFiled: December 18, 2003Date of Patent: March 14, 2006Assignee: Aisin AW Co., Ltd.Inventors: Yasuhiko Kobayashi, Takeshi Inuzuka, Shigeki Takami, Yoshitaka Murase, Yoichi Tajima, Takayuki Kubo, Takahiro Kido
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Patent number: 6988974Abstract: A control device for a vehicle including a motor, an engine, wherein the motor can be drivingly connected with the engine, a torque converter, a transmission mechanism for transmitting the drive torque, which is transmitted via the torque converter from the engine and the motor, to drive wheels, and a controller that controls a driving state of the motor, controls a driving state of the engine, and outputs a torque reduction command for controlling a drive torque of the motor in order to place the drive torque of the motor within a maximum input torque of the transmission mechanism, wherein the maximum input torque is calculated based on a torque ratio of the torque converter when the engine begins driving after the motor begins driving.Type: GrantFiled: December 18, 2003Date of Patent: January 24, 2006Assignee: Aisin AW Co., Ltd.Inventors: Yasuhiko Kobayashi, Yukinori Nakamori, Shigeki Takami, Atsushi Kayukawa, Yoichi Tajima, Yoshitaka Murase
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Patent number: 6966867Abstract: A control device for hybrid vehicles, including a motor drivingly connected to an engine, a transmission that transmits output torques of the engine and the motor to drive wheels, and a controller that performs torque reduction control by which an input torque to the transmission is reduced, wherein when torque reduction control is consecutively performed, the input torque is reduced at least once by a negative torque output from the motor.Type: GrantFiled: December 1, 2003Date of Patent: November 22, 2005Assignee: Aisin AW Co., Ltd.Inventors: Yoichi Tajima, Yoshitaka Murase, Takayuki Kubo, Yasuhiko Kobayashi, Shigeki Takami, Yukinori Nakamori
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Publication number: 20050221939Abstract: A hybrid drive unit includes a three-element planetary gear coupled to two motors, and a reduction planetary gear which is drivingly connected to the three-element planetary gear and switches modes by controlling a clutch and a brake. A three-element direct drive mode is able to be achieved by providing another clutch which couples together any two elements of the reduction planetary gear, and locking up the reduction planetary gear. As a result, motor output is reduced compared with a four-element direct drive mode of related art during high-speed running, and energy recovery efficiency during regeneration can also be improved.Type: ApplicationFiled: March 25, 2005Publication date: October 6, 2005Applicant: AISIN AW CO., LTD.Inventors: Shigeki Takami, Kozo Yamaguchi, Takeshi Inuzuka, Tomohiko Ito
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Patent number: 6932176Abstract: A control system for a hybrid vehicle that is capable of absorbing an inertial force which is generated during shifting of a stepped transmission. During shift control of the stepped transmission by a shift control device and before the shift control is completed, a during-shift drive control element controls a driving force which is output from a second drive unit such that a total driving force which is output from first and second drive units to the drive wheels equals a driver request output. Further, the during-shift drive control elements executes control so as to reduce a difference between the total driving force output to a drive wheel and the driver request output based on a change in a transmission force of the stepped transmission caused by a switch-over between a first brake and a second brake.Type: GrantFiled: July 14, 2004Date of Patent: August 23, 2005Assignees: Aisin Aw Co., Ltd., Toytoa Jidosha Kabushiki KaishaInventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta, Hiroatsu Endo, Tatsuya Ozeki
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Publication number: 20050115750Abstract: A hybrid drive unit includes a hybrid mechanism having at least one electric motor and a transfer that distributes driving force to front and rear wheels. The electric motor and the transfer are housed in a tubular shaped transmission case that extends in the front and rear directions of a vehicle. The hybrid drive unit is mounted on and supported by a second attachment coupled to an internal combustion engine and provided at a front end of the hybrid drive unit and a first attachment portion fixed to a vehicle body. The electric motor and the transfer that are heavy structural members of the hybrid drive unit are positioned separately to the front and rear of the first attachment portion that forms a boundary. By adopting this configuration, it is possible to reduce the amount of engine vibration that is transmitted to the vehicle body through the first attachment portion.Type: ApplicationFiled: November 23, 2004Publication date: June 2, 2005Inventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta, Kazuhisa Ozaki
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Publication number: 20050103544Abstract: A control apparatus of a hybrid vehicle having a first drive unit, a second drive unit, a HV battery, a shift control element, a battery state detection element, and a shifting-time drive control element. Furthermore, in the control apparatus, a battery balance control element is formed by an engine control element, a first motor control element, a second motor control element and the shifting-time drive control element. If the shift control element determines there is a need for shifting carried out by a stepped transmission, the battery balance control element calculates the amount of increase/decrease in the amount of charge of the HV battery in accordance with the state of the HV battery, and changes the engine operation point on the basis of the calculated amount of increase/decrease in the battery charge, prior to the shifting.Type: ApplicationFiled: September 22, 2004Publication date: May 19, 2005Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta, Tatsuya Ozeki, Hiroatsu Endo
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Publication number: 20050029024Abstract: A control unit for a vehicle including a controller that determines whether shifting of a stepped transmission is necessary, and increases output torque of a first drive unit and decreases output torque of a second drive unit in correspondence with an increase of the output torque of the first drive unit, the increase and the decrease being performed prior to shifting of the stepped transmission when a determination is made that shifting is necessary.Type: ApplicationFiled: August 4, 2004Publication date: February 10, 2005Applicant: AISIN AW CO., LTD.Inventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta
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Publication number: 20050029023Abstract: A control system for a hybrid vehicle that is capable of absorbing an inertial force which is generated during shifting of a stepped transmission. During shift control of the stepped transmission by a shift control device and before the shift control is completed, a during-shift drive control element controls a driving force which is output from a second drive unit such that a total driving force which is output from first and second drive units to the drive wheels equals a driver request output. Further, the during-shift drive control elements executes control so as to reduce a difference between the total driving force output to a drive wheel and the driver request output based on a change in a transmission force of the stepped transmission caused by a switch-over between a first brake and a second brake.Type: ApplicationFiled: July 14, 2004Publication date: February 10, 2005Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta, Hiroatsu Endo, Tatsuya Ozeki
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Publication number: 20040235614Abstract: A control device for a hybrid vehicle, the hybrid vehicle including a motor, connected to an engine output shaft, to which an engine output is transmitted, and an automatic transmission, the automatic transmission including an input shaft, connected to the engine output shaft, and an output shaft, connected to a driving wheel, the control device including a request output detection unit that detects a driver's requested output; an engine control unit that controls the engine output; a motor control unit that controls motor output so that total output of the motor output and the engine output becomes the driver's requested output; and a limitation request output unit that, when the driver's request output is larger than input-available driving force to the input shaft of the automatic transmission, outputs a limitation request to limit the total output to limitation output, which is smaller than or equal to the input-available driving force, wherein the motor control unit, when the limitation request is outputType: ApplicationFiled: March 19, 2004Publication date: November 25, 2004Applicant: AISIN AW CO., LTD.Inventors: Yoichi Tajima, Yoshitaka Murase, Takayuki Kubo, Takeshi Inuzuka, Yasuhiko Kobayashi, Shigeki Takami, Takahiro Kido
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Publication number: 20040152558Abstract: A control unit for a hybrid vehicle includes a take-off detection unit that detects a start of movement of the hybrid vehicle from a stopped state; and a torque control unit that limits a engine torque input to an automatic transmission from becoming excessive by generating negative torque using a regeneration operation of a motor on occasions when the start of running of the hybrid vehicle is detected by the take-off detection unit. Accordingly, it is possible to reliably inhibit problems, such as an occupant of the hybrid vehicle being caused to feel an unpleasant jolt due to torque transmitted to a driven wheel side increasing instantaneously as a result of change in an application state of a clutch during the start of movement.Type: ApplicationFiled: December 22, 2003Publication date: August 5, 2004Applicant: AISIN AW CO., LTD.Inventors: Shigeki Takami, Takeshi Inuzuka, Yasuhiko Kobayashi, Yoshitaka Murase, Yoichi Tajima, Takayuki Kubo, Takahiro Kido
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Publication number: 20040144608Abstract: A fluid pressure control device including a torque converter that is placed between a output shaft of an engine and an input shaft of a transmission, a mechanical oil pump that is driven by the output shaft, a clutch that directly engages the output shaft and the input shaft by employing an engagement pressure based on a fluid pressure that is generated by the mechanical oil pump, an electric oil pump that can supply a fluid pressure to the clutch, and a control unit for controlling the electric oil pump, wherein when the engagement pressure based on the fluid pressure that is generated by the mechanical oil pump is an amount below a necessary engagement pressure that is necessary to engage the clutch, the control unit drives the electric oil pump so as to supply a fluid pressure by at least the amount to the clutch.Type: ApplicationFiled: December 18, 2003Publication date: July 29, 2004Applicant: AISIN AW CO., LTD.Inventors: Yasuhiko Kobayashi, Takeshi Inuzuka, Shigeki Takami, Yoshitaka Murase, Yoichi Tajima, Takayuki Kubo, Takahiro Kido
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Publication number: 20040134697Abstract: A control device for a vehicle including a motor, an engine, wherein the motor can be drivingly connected with the engine, a torque converter, a transmission mechanism for transmitting the drive torque, which is transmitted via the torque converter from the engine and the motor, to drive wheels, and a controller that controls a driving state of the motor, controls a driving state of the engine, and outputs a torque reduction command for controlling a drive torque of the motor in order to place the drive torque of the motor within a maximum input torque of the transmission mechanism, wherein the maximum input torque is calculated based on a torque ratio of the torque converter when the engine begins driving after the motor begins driving.Type: ApplicationFiled: December 18, 2003Publication date: July 15, 2004Applicant: AISIN AW CO., LTDInventors: Yasuhiko Kobayashi, Yukinori Nakamori, Shigeki Takami, Atsushi Kayukawa, Yoichi Tajima, Yoshitaka Murase
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Publication number: 20040127326Abstract: A control device for hybrid vehicles, including a motor drivingly connected to an engine, a transmission that transmits output torques of the engine and the motor to drive wheels, and a controller that performs torque reduction control by which an input torque to the transmission is reduced, wherein when torque reduction control is consecutively performed, the input torque is reduced at least once by a negative torque output from the motor.Type: ApplicationFiled: December 1, 2003Publication date: July 1, 2004Applicant: AISIN AW CO., LTD.Inventors: Yoichi Tajima, Yoshitaka Murase, Takayuki Kubo, Yasuhiko Kobayashi, Shigeki Takami, Yukinori Nakamori