Patents by Inventor Ryozo Hiraku

Ryozo Hiraku 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: 8512202
    Abstract: A shift controller controls a transmission for a hybrid vehicle in which: an engine and a motor are connected together via a clutch; and the transmission is placed between the motor and driving wheels. The shift controller has: a first shift controlling unit which performs shift control on a basis of at least one of transmission efficiency of the transmission and power generation efficiency of the motor in a case where regeneration is performed with the clutch disengaged during deceleration of the hybrid vehicle; and a second shift controlling unit which performs shift control to make a transmission gear ratio of the transmission smaller than in the shift control performed by the first shift controlling unit in a case where the regeneration is performed with the clutch engaged during the deceleration of the hybrid vehicle.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: August 20, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yoshikazu Oota, Ryozo Hiraku, Takeshi Morita, Akira Takano
  • Publication number: 20110319225
    Abstract: A shift controller controls a transmission for a hybrid vehicle in which: an engine and a motor are connected together via a clutch; and the transmission is placed between the motor and driving wheels. The shift controller has: a first shift controlling unit which performs shift control on a basis of at least one of transmission efficiency of the transmission and power generation efficiency of the motor in a case where regeneration is performed with the clutch disengaged during deceleration of the hybrid vehicle; and a second shift controlling unit which performs shift control to make a transmission gear ratio of the transmission smaller than in the shift control performed by the first shift controlling unit in a case where the regeneration is performed with the clutch engaged during the deceleration of the hybrid vehicle.
    Type: Application
    Filed: June 24, 2011
    Publication date: December 29, 2011
    Inventors: Yoshikazu OOTA, Ryozo Hiraku, Takeshi MORITA, Akira TAKANO
  • Patent number: 7204781
    Abstract: A transmission apparatus includes at least an auxiliary transmission for supplementing a main transmission. The auxiliary transmission includes a damper which has a damper characteristic adapted to a low speed select state of the auxiliary transmission, and which is disposed in a low speed transmission path used for transmission of torque in the low speed select state of the auxiliary transmission. The auxiliary transmission further comprises a bypass member defining a bypass transmission path bypassing the low speed damper. The bypass transmission path is a torque path used for transmission of torque in a high speed select state of the auxiliary transmission.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: April 17, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Ryozo Hiraku, Shin Kobayashi
  • Publication number: 20060063632
    Abstract: A transmission apparatus includes at least an auxiliary transmission for supplementing a main transmission. The auxiliary transmission includes a damper which has a damper characteristic adapted to a low speed select state of the auxiliary transmission, and which is disposed in a low speed transmission path used for transmission of torque in the low speed select state of the auxiliary transmission. The auxiliary transmission further comprises a bypass member defining a bypass transmission path bypassing the low speed damper. The bypass transmission path is a torque path used for transmission of torque in a high speed select state of the auxiliary transmission.
    Type: Application
    Filed: November 16, 2005
    Publication date: March 23, 2006
    Inventors: Ryozo Hiraku, Shin Kobayashi
  • Patent number: 6979275
    Abstract: A transmission apparatus includes at least an auxiliary transmission for supplementing a main transmission. The auxiliary transmission includes a damper which has a damper characteristic adapted to a low speed select state of the auxiliary transmission, and which is disposed in a low speed transmission path used for transmission of torque in the low speed select state of the auxiliary transmission. The auxiliary transmission further comprises a bypass member defining a bypass transmission path bypassing the low speed damper. The bypass transmission path is a torque path used for transmission of torque in a high speed select state of the auxiliary transmission.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: December 27, 2005
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Ryozo Hiraku, Shin Kobayashi
  • Patent number: 6569055
    Abstract: A hybrid vehicle includes a first motor generator (1) and an engine (3) connected to first drive wheels (7) via a transmission (5), a second motor generator connected to a second drive wheel (17), a battery (8) electrically connected to the first and second motor generators (7,17), a sensor (25) which detects a running state of the vehicle, a sensor which detects a charge state of the battery (8), and a controller (10,11,12). The controller (10,11,12) controls a drive force of the engine (3) and the first motor generator (1) according to the running state of the vehicle and the charge state of the battery (8), and drives the second motor generator (2) by the battery (8) or the power generated by the first motor generator (1).
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: May 27, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Toru Urasawa, Satoshi Sakakibara, Chiaki Harada, Asuka Soutome, Ryozo Hiraku, Makoto Shouji, Takashi Nakazawa
  • Publication number: 20020169047
    Abstract: A transmission apparatus includes at least an auxiliary transmission for supplementing a main transmission. The auxiliary transmission includes a damper which has a damper characteristic adapted to a low speed select state of the auxiliary transmission, and which is disposed in a low speed transmission path used for transmission of torque in the low speed select state of the auxiliary transmission. The auxiliary transmission further comprises a bypass member defining a bypass transmission path bypassing the low speed damper. The bypass transmission path is a torque path used for transmission of torque in a high speed select state of the auxiliary transmission.
    Type: Application
    Filed: May 13, 2002
    Publication date: November 14, 2002
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Ryozo Hiraku, Shin Kobayashi
  • Publication number: 20020094908
    Abstract: A hybrid vehicle includes a first motor generator (1) and an engine (3) connected to first drive wheels (7) via a transmission (5), a second motor generator connected to a second drive wheel (17), a battery (8) electrically connected to the first and second motor generators (7,17), a sensor (25) which detects a running state of the vehicle, a sensor which detects a charge state of the battery (8), and a controller (10,11,12). The controller (10,11,12) controls a drive force of the engine (3) and the first motor generator (1) according to the running state of the vehicle and the charge state of the battery (8), and drives the second motor generator (2) by the battery (8) or the power generated by the first motor generator (1).
    Type: Application
    Filed: December 20, 2001
    Publication date: July 18, 2002
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Toru Urasawa, Satoshi Sakakibara, Chiaki Harada, Asuka Soutome, Ryozo Hiraku, Makoto Shouji, Takashi Nakazawa