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).
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Patent number: 8512202Abstract: 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: GrantFiled: June 24, 2011Date of Patent: August 20, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Yoshikazu Oota, Ryozo Hiraku, Takeshi Morita, Akira Takano
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Publication number: 20110319225Abstract: 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: ApplicationFiled: June 24, 2011Publication date: December 29, 2011Inventors: Yoshikazu OOTA, Ryozo Hiraku, Takeshi MORITA, Akira TAKANO
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Patent number: 7204781Abstract: 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: GrantFiled: November 16, 2005Date of Patent: April 17, 2007Assignee: Nissan Motor Co., Ltd.Inventors: Ryozo Hiraku, Shin Kobayashi
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Publication number: 20060063632Abstract: 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: ApplicationFiled: November 16, 2005Publication date: March 23, 2006Inventors: Ryozo Hiraku, Shin Kobayashi
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Patent number: 6979275Abstract: 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: GrantFiled: May 13, 2002Date of Patent: December 27, 2005Assignee: Nissan Motor Co., Ltd.Inventors: Ryozo Hiraku, Shin Kobayashi
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Patent number: 6569055Abstract: 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: GrantFiled: December 20, 2001Date of Patent: May 27, 2003Assignee: Nissan Motor Co., Ltd.Inventors: Toru Urasawa, Satoshi Sakakibara, Chiaki Harada, Asuka Soutome, Ryozo Hiraku, Makoto Shouji, Takashi Nakazawa
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Publication number: 20020169047Abstract: 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: ApplicationFiled: May 13, 2002Publication date: November 14, 2002Applicant: NISSAN MOTOR CO., LTD.Inventors: Ryozo Hiraku, Shin Kobayashi
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Publication number: 20020094908Abstract: 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: ApplicationFiled: December 20, 2001Publication date: July 18, 2002Applicant: NISSAN MOTOR CO., LTD.Inventors: Toru Urasawa, Satoshi Sakakibara, Chiaki Harada, Asuka Soutome, Ryozo Hiraku, Makoto Shouji, Takashi Nakazawa