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).

  • Publication number: 20070107960
    Abstract: 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: Application
    Filed: October 26, 2006
    Publication date: May 17, 2007
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigeki Takami, Tomoo Atarashi, Hirotaka Yata, Makoto Iwanaka, Takuma Kakinami, Yasuo Hojo, Masahiro Kojima, Ryuji Ibaraki, Atsushi Tabata, Yuji Iwase, Tooru Matsubara, Hiroyuki Shibata
  • Publication number: 20070107961
    Abstract: 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: Application
    Filed: October 26, 2006
    Publication date: May 17, 2007
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Makoto Iwanaka, Shigeki Takami, Ryuji Ibaraki, Tooru Matsubara, Hiroyuki Shibata
  • Publication number: 20070103106
    Abstract: 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: Application
    Filed: October 26, 2006
    Publication date: May 10, 2007
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Makoto Iwanaka, Shigeki Takami, Ryuji Ibaraki, Tooru Matsubara, Hiroyuki Shibata
  • Publication number: 20060276288
    Abstract: 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: Application
    Filed: June 1, 2006
    Publication date: December 7, 2006
    Applicant: AISIN AW CO., LTD.
    Inventors: Makoto Iwanaka, Shigeki Takami
  • Patent number: 7089095
    Abstract: 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: Grant
    Filed: December 22, 2003
    Date of Patent: August 8, 2006
    Assignee: Aisin AW Co., Ltd
    Inventors: Shigeki Takami, Takeshi Inuzuka, Yasuhiko Kobayashi, Yoshitaka Murase, Yoichi Tajima, Takayuki Kubo, Takahiro Kido
  • Patent number: 7017348
    Abstract: 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 output
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: March 28, 2006
    Assignee: Aisin AW Co., Ltd.
    Inventors: Yoichi Tajima, Yoshitaka Murase, Takayuki Kubo, Takeshi Inuzuka, Yasuhiko Kobayashi, Shigeki Takami, Takahiro Kido
  • Patent number: 7011603
    Abstract: 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: Grant
    Filed: December 18, 2003
    Date of Patent: March 14, 2006
    Assignee: Aisin AW Co., Ltd.
    Inventors: Yasuhiko Kobayashi, Takeshi Inuzuka, Shigeki Takami, Yoshitaka Murase, Yoichi Tajima, Takayuki Kubo, Takahiro Kido
  • Patent number: 6988974
    Abstract: 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: Grant
    Filed: December 18, 2003
    Date of Patent: January 24, 2006
    Assignee: Aisin AW Co., Ltd.
    Inventors: Yasuhiko Kobayashi, Yukinori Nakamori, Shigeki Takami, Atsushi Kayukawa, Yoichi Tajima, Yoshitaka Murase
  • Patent number: 6966867
    Abstract: 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: Grant
    Filed: December 1, 2003
    Date of Patent: November 22, 2005
    Assignee: Aisin AW Co., Ltd.
    Inventors: Yoichi Tajima, Yoshitaka Murase, Takayuki Kubo, Yasuhiko Kobayashi, Shigeki Takami, Yukinori Nakamori
  • Publication number: 20050221939
    Abstract: 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: Application
    Filed: March 25, 2005
    Publication date: October 6, 2005
    Applicant: AISIN AW CO., LTD.
    Inventors: Shigeki Takami, Kozo Yamaguchi, Takeshi Inuzuka, Tomohiko Ito
  • Patent number: 6932176
    Abstract: 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: Grant
    Filed: July 14, 2004
    Date of Patent: August 23, 2005
    Assignees: Aisin Aw Co., Ltd., Toytoa Jidosha Kabushiki Kaisha
    Inventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta, Hiroatsu Endo, Tatsuya Ozeki
  • Publication number: 20050115750
    Abstract: 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: Application
    Filed: November 23, 2004
    Publication date: June 2, 2005
    Inventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta, Kazuhisa Ozaki
  • Publication number: 20050103544
    Abstract: 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: Application
    Filed: September 22, 2004
    Publication date: May 19, 2005
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta, Tatsuya Ozeki, Hiroatsu Endo
  • Publication number: 20050029024
    Abstract: 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: Application
    Filed: August 4, 2004
    Publication date: February 10, 2005
    Applicant: AISIN AW CO., LTD.
    Inventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta
  • Publication number: 20050029023
    Abstract: 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: Application
    Filed: July 14, 2004
    Publication date: February 10, 2005
    Applicants: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigeki Takami, Kiyotomo Miura, Satoru Wakuta, Hiroatsu Endo, Tatsuya Ozeki
  • Publication number: 20040235614
    Abstract: 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 output
    Type: Application
    Filed: March 19, 2004
    Publication date: November 25, 2004
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoichi Tajima, Yoshitaka Murase, Takayuki Kubo, Takeshi Inuzuka, Yasuhiko Kobayashi, Shigeki Takami, Takahiro Kido
  • Publication number: 20040152558
    Abstract: 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: Application
    Filed: December 22, 2003
    Publication date: August 5, 2004
    Applicant: AISIN AW CO., LTD.
    Inventors: Shigeki Takami, Takeshi Inuzuka, Yasuhiko Kobayashi, Yoshitaka Murase, Yoichi Tajima, Takayuki Kubo, Takahiro Kido
  • Publication number: 20040144608
    Abstract: 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: Application
    Filed: December 18, 2003
    Publication date: July 29, 2004
    Applicant: AISIN AW CO., LTD.
    Inventors: Yasuhiko Kobayashi, Takeshi Inuzuka, Shigeki Takami, Yoshitaka Murase, Yoichi Tajima, Takayuki Kubo, Takahiro Kido
  • Publication number: 20040134697
    Abstract: 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: Application
    Filed: December 18, 2003
    Publication date: July 15, 2004
    Applicant: AISIN AW CO., LTD
    Inventors: Yasuhiko Kobayashi, Yukinori Nakamori, Shigeki Takami, Atsushi Kayukawa, Yoichi Tajima, Yoshitaka Murase
  • Publication number: 20040127326
    Abstract: 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: Application
    Filed: December 1, 2003
    Publication date: July 1, 2004
    Applicant: AISIN AW CO., LTD.
    Inventors: Yoichi Tajima, Yoshitaka Murase, Takayuki Kubo, Yasuhiko Kobayashi, Shigeki Takami, Yukinori Nakamori