Patents by Inventor Takeo Aizawa

Takeo Aizawa 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).

  • Patent number: 11312363
    Abstract: It is a control method of a hybrid vehicle that includes an engine and an electrical power generation motor that is connected with the engine for controlling a rotational speed of the engine to be a target rotational speed. When an failure with respect to the engine is judged, an upper limit of a target rotational speed of a firing operation is set to a first upper limit rotational speed lower than an upper limit for a normal state. Further, a target rotational speed of a motoring operation is set to be not higher than the first upper limit rotational speed. It becomes possible to carry out transition between the firing operation and the motoring operation quickly.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: April 26, 2022
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yuki Fujita, Takeo Aizawa, Kazuki Iijima
  • Publication number: 20200391722
    Abstract: It is a control method of a hybrid vehicle that includes an engine and an electrical power generation motor that is connected with the engine for controlling a rotational speed of the engine to be a target rotational speed. When an failure with respect to the engine is judged, an upper limit of a target rotational speed of a firing operation is set to a first upper limit rotational speed lower than an upper limit for a normal state. Further, a target rotational speed of a motoring operation is set to be not higher than the first upper limit rotational speed. It becomes possible to carry out transition between the firing operation and the motoring operation quickly.
    Type: Application
    Filed: December 15, 2017
    Publication date: December 17, 2020
    Inventors: Yuki Fujita, Takeo Aizawa, Kazuki Iijima
  • Patent number: 10000205
    Abstract: A fail-safe control device is provided for hybrid vehicles which allows a travel distance of a vehicle to be extended in an event of an ON-failure of a second clutch. An integrated controller switches between an HEV mode and an EV mode by controlling a first clutch between an engine and a motor, and a second clutch between the motor and a continuously variable transmission. The integrated controller prohibits the transition from the HEV mode to the EV mode when a clutch failure determination unit detects an ON-failure of the second clutch while the vehicle is traveling in the HEV mode.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: June 19, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenji Koshiba, Takeo Aizawa, Hideki Kawashima
  • Publication number: 20180093660
    Abstract: A fail-safe control device is provided for hybrid vehicles which allows a travel distance of a vehicle to be extended in an event of an ON-failure of a second clutch. An integrated controller switches between an HEV mode and an EV mode by controlling a first clutch between an engine and a motor, and a second clutch between the motor and a continuously variable transmission. The integrated controller prohibits the transition from the HEV mode to the EV mode when a clutch failure determination unit detects an ON-failure of the second clutch while the vehicle is traveling in the HEV mode.
    Type: Application
    Filed: March 20, 2015
    Publication date: April 5, 2018
    Inventors: Kenji KOSHIBA, Takeo AIZAWA, Hideki KAWASHIMA
  • Patent number: 8880263
    Abstract: A control device is provided for controlling a hybrid vehicle including an engine, a motor generator, and a battery arranged to be charged by and to discharge to the motor generator. The control device includes an abnormality judging section configured to judge whether or not an abnormality is generated in the engine. The control device further includes an assist prohibition section configured to prohibit the motor generator from being used as a power source when the abnormality is generated in the engine.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: November 4, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takeo Aizawa, Kakuzou Kaneko, Hirotaka Koyama
  • Patent number: 8788132
    Abstract: A control system for a hybrid vehicle is provided with an abnormality detection unit, a start determination unit, and a start control unit. The abnormality detection unit detects abnormality in at least one of an engine, a first clutch, and an automatic transmission. The start determination unit determines whether or not to allow the engine to be started, and the start control unit controls to start the engine. If an abnormality has been detected by the abnormality detection unit, the start determination unit inhibits the start control unit from starting the engine, and maintains the inhibition even when the abnormality has been eliminated, when the accelerator pedal opening is larger than a predetermined value.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: July 22, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takeo Aizawa, Kakuzou Kaneko, Hirotaka Koyama
  • Patent number: 8636620
    Abstract: An automatic transmission has a transmission control section performing a control so that a transmission ratio defined as input rpm/output rpm of the automatic transmission becomes a target transmission ratio, a slip control section slip-controlling a frictional engagement element in the automatic transmission so that the input rpm becomes a value obtained by multiplying the output rpm by the target transmission ratio also adding a predetermined slip revolution speed; and an abnormality judgment section judging abnormality in the automatic transmission. When the slip-control is not in progress, if an actual transmission ratio is out of a predetermined range of the target transmission ratio, the abnormality judgment section judges that abnormality occurs. When the slip-control is in progress, if a value obtained by correcting the actual transmission ratio on the basis of the slip revolution speed is out of the predetermined range, the abnormality judgment section judges that abnormality occurs.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: January 28, 2014
    Assignee: JATCO Ltd
    Inventors: Fumitaka Nagashima, Hajime Tasaka, Takateru Kawaguchi, Takeo Aizawa, Kakuzou Kaneko
  • Publication number: 20130218391
    Abstract: A control system for a hybrid vehicle is provided with an abnormality detection unit, a start determination unit, and a start control unit. The abnormality detection unit detects abnormality in at least one of an engine, a first clutch, and an automatic transmission. The start determination unit determines whether or not to allow the engine to be started, and the start control unit controls to start the engine. If an abnormality has been detected by the abnormality detection unit, the start determination unit inhibits the start control unit from starting the engine, and maintains the inhibition even when the abnormality has been eliminated, when the accelerator pedal opening is larger than a predetermined value.
    Type: Application
    Filed: October 6, 2011
    Publication date: August 22, 2013
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Takeo Aizawa, Kakuzou Kaneko, Hirotaka Koyama
  • Publication number: 20130218392
    Abstract: A control device 60 for controlling a hybrid vehicle 1 including an engine 10, a motor generator 20, and a battery 30 arranged to be charged by and discharge to the motor generator 20, the control device 60 includes an abnormality judging section 410 configured to judge whether or not an abnormality is generated in the engine 10, and an assist prohibition section 420 configured to prohibit the motor generator 20 from being used as a power source when the abnormality is generated in the engine 10.
    Type: Application
    Filed: October 11, 2011
    Publication date: August 22, 2013
    Inventors: Takeo Aizawa, Kakuzou Kaneko, Hirotaka Koyama
  • Publication number: 20120108391
    Abstract: An automatic transmission has a transmission control section performing a control so that a transmission ratio defined as input rpm/output rpm of the automatic transmission becomes a target transmission ratio, a slip control section slip-controlling a frictional engagement element in the automatic transmission so that the input rpm becomes a value obtained by multiplying the output rpm by the target transmission ratio also adding a predetermined slip revolution speed; and an abnormality judgment section judging abnormality in the automatic transmission. When the slip-control is not in progress, if an actual transmission ratio is out of a predetermined range of the target transmission ratio, the abnormality judgment section judges that abnormality occurs. When the slip-control is in progress, if a value obtained by correcting the actual transmission ratio on the basis of the slip revolution speed is out of the predetermined range, the abnormality judgment section judges that abnormality occurs.
    Type: Application
    Filed: October 26, 2011
    Publication date: May 3, 2012
    Inventors: Fumitaka Nagashima, Hajime Tasaka, Takateru Kawaguchi, Takeo Aizawa, Kakuzou Kaneko
  • Patent number: 7053566
    Abstract: A drive train for a hybrid electric vehicle has an engine, first and second motor/generators, a third motor, and a transmission in connecting relationships with the engine, the motor/generators, and the third motor. The transmission has planetary gear sets to be shifted among a plurality of running modes including a large driving force running mode. A controller controls surplus power caused by power balance between the first and second motor/generators to be supplied to the third motor when the surplus power is generated and the vehicle starts with the transmission being operated in the large driving force running mode.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: May 30, 2006
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takeo Aizawa, Taiichi Onoyama
  • Publication number: 20050082992
    Abstract: A drive train for a hybrid electric vehicle has an engine, first and second motor/generators, a third motor, and a transmission in connecting relationships with the engine, the motor/generators, and the third motor. The transmission has planetary gear sets to be shifted among a plurality of running modes including a large driving force running mode. A controller controls surplus power caused by power balance between the first and second motor/generators to be supplied to the third motor when the surplus power is generated and the vehicle starts with the transmission being operated in the large driving force running mode.
    Type: Application
    Filed: October 14, 2004
    Publication date: April 21, 2005
    Inventors: Takeo Aizawa, Taiichi Onoyama, Taiichi Onoyama
  • Patent number: 4220705
    Abstract: A multi-colored display polarizer is manufactured by supporting on a transparent substrate a multi-colored polarizing film which is produced by a required number of repetitions, each using a coloring means producing a different color, a sequence of operations comprising coating a photosensitive resin onto the surface of a polarizing film blank and drying the same, exposing the coated film through a photographic negative having a desired pattern thereon to photo-set a portion of the film corresponding to the transparent portion of the negative, developing the thus exposed film, coloring the thus developed film with a suitable coloring means, and removing the photosensitive resin remaining on said photoset portion of the film.
    Type: Grant
    Filed: September 12, 1978
    Date of Patent: September 2, 1980
    Assignee: Sanritsu Denki Kabushikikaisha
    Inventors: Shigeyoshi Sugibuchi, Mitsuo Hiramatsu, Takeo Aizawa