Patents by Inventor Ippei Nagao

Ippei Nagao 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: 8046124
    Abstract: A control apparatus for an electric vehicle includes a road surface condition detection portion, a slip determination portion, a torque reduction device, and a voltage control device. The electric vehicle includes a motor that generates drive power for the electric vehicle, and a drive device that drives the motor. The road surface condition detection portion detects the condition of a road surface on which the electric vehicle is driven. The slip determination portion determines whether the electric vehicle is slipping. The torque reduction device reduces the torque of the motor when the slip determination portion determines that the electric vehicle is slipping. The voltage control device controls a voltage input to the drive device to reduce the voltage when the road surface condition detection portion determines that the road surface has a friction coefficient lower than a predetermined value.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: October 25, 2011
    Assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Koichiro Muta, Ippei Nagao
  • Publication number: 20100156352
    Abstract: A charging/discharging controller (2) for a secondary battery (10) including means for determining whether a request for continuous charging/discharging for the secondary battery (10) exists, means for setting a continuous charging/discharging electrical power for the secondary battery (10) within a range smaller than the limited charging/discharging electrical power that is determined periodically or at each point in time according to a battery condition of the secondary battery (10), and means for controlling at least one of the power generated by the electric generating means and the power consumed by the loading means so that electrical power charging/discharging the secondary battery (10) is the continuous charging/discharging electrical power set by the setting means, when the request for continuous charging/discharging is determined to exist by the determining means.
    Type: Application
    Filed: February 13, 2007
    Publication date: June 24, 2010
    Inventors: Koichiro Muta, Ippei Nagao
  • Publication number: 20070187158
    Abstract: A control apparatus for an electric vehicle includes a road surface condition detection portion, a slip determination portion, a torque reduction device, and a voltage control device. The electric vehicle includes a motor that generates drive power for the electric vehicle, and a drive device that drives the motor. The road surface condition detection portion detects the condition of a road surface on which the electric vehicle is driven. The slip determination portion determines whether the electric vehicle is slipping. The torque reduction device reduces the torque of the motor when the slip determination portion determines that the electric vehicle is slipping. The voltage control device controls a voltage input to the drive device to reduce the voltage when the road surface condition detection portion determines that the road surface has a friction coefficient lower than a predetermined value.
    Type: Application
    Filed: February 15, 2007
    Publication date: August 16, 2007
    Inventors: Koichiro Muta, Ippei Nagao