Patents by Inventor Kensuke Takagi

Kensuke Takagi 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: 10391863
    Abstract: When ignition is on, a shift position is a neutral position, and shut-down of the inverter is cancelled in a state that a short circuit fault occurs in any phase among multiple phases of the inverter, the electrically driven vehicle performs a first ON control to turn on upper and lower arms in any arbitrary phase among the multiple phases. When an abnormality is detected in the inverter due to the first ON control, the electrically driven vehicle performs a second ON control to turn on upper and lower arms in a different phase from the phase of the first ON control.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: August 27, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensuke Takagi, Tomoko Oba
  • Publication number: 20190193564
    Abstract: When ignition is on, a shift position is a neutral position, and shut-down of the inverter is cancelled in a state that a short circuit fault occurs in any phase among multiple phases of the inverter, the electrically driven vehicle performs a first ON control to turn on upper and lower arms in any arbitrary phase among the multiple phases. When an abnormality is detected in the inverter due to the first ON control, the electrically driven vehicle performs a second ON control to turn on upper and lower arms in a different phase from the phase of the first ON control.
    Type: Application
    Filed: December 21, 2018
    Publication date: June 27, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensuke Takagi, Tomoko Oba
  • Patent number: 8423217
    Abstract: A hybrid vehicle wherein such a situation that the residual capacity of a battery drops significantly below the lower limit of a reasonable range is avoided while fuel efficiency is enhanced. The hybrid vehicle, including an engine, a generator, a battery, and an electric motor for driving, is further provided with a converter for supplying the voltage of the battery that has been boosted to the electric motor, an eco-switch for selecting a first mode or a second mode in association with the boosting operation of the converter, and a hybrid ECU for changing the upper limit of the voltage boosted by the converter from a first upper limit in the first mode to a second upper limit lower than the first upper limit when the second mode is selected by the eco-switch, and changing the upper limit of the voltage boosted by the converter from the second upper limit to the first upper limit when the residual capacity of the battery drops below a threshold.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: April 16, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasushi Kojima, Kensuke Takagi, Masatoshi Kimata
  • Publication number: 20110093151
    Abstract: A hybrid vehicle wherein such a situation that the residual capacity of a battery drops significantly below the lower limit of a reasonable range is avoided while fuel efficiency is enhanced. The hybrid vehicle, including an engine, a generator, a battery, and an electric motor for driving, is further provided with a converter for supplying the voltage of the battery that has been boosted to the electric motor, an eco-switch for selecting a first mode or a second mode in association with the boosting operation of the converter, and a hybrid ECU for changing the upper limit of the voltage boosted by the converter from a first upper limit in the first mode to a second upper limit lower than the first upper limit when the second mode is selected by the eco-switch, and changing the upper limit of the voltage boosted by the converter from the second upper limit to the first upper limit when the residual capacity of the battery drops below a threshold.
    Type: Application
    Filed: June 8, 2009
    Publication date: April 21, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasushi Kojima, Kensuke Takagi, Masatoshi Kimata