Patents by Inventor Takuya Shirasaka

Takuya Shirasaka 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: 7327104
    Abstract: A control apparatus for an electrically-powered vehicle that includes an electrical motor, a motor control unit, and a traction control unit that controls a drive force so as to suppress spinning of driving wheels based on an operation request, includes: a driver requesting torque calculation unit that calculates a driver requesting torque; a traction requesting torque calculation unit that calculates a traction requesting torque; a torque command calculation unit that calculates a torque command based on the operation request, the driver requesting torque, and the traction requesting torque, during execution of the drive force control by the traction control unit; and a revolution rate sensor, wherein the torque command calculation unit is adapted to set the torque command to a value greater than zero regardless of the operation request when the revolution rate of the electrical motor is less than or equal to a predetermined value.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: February 5, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventors: Asao Uenodai, Takuya Shirasaka, Tohru Ikeda, Hisanori Yanagida
  • Publication number: 20070075659
    Abstract: A control apparatus for an electrically-powered vehicle that includes an electrical motor, a motor control unit, and a traction control unit that controls a drive force so as to suppress spinning of driving wheels based on an operation request, includes: a driver requesting torque calculation unit that calculates a driver requesting torque; a traction requesting torque calculation unit that calculates a traction requesting torque; a torque command calculation unit that calculates a torque command based on the operation request, the driver requesting torque, and the traction requesting torque, during execution of the drive force control by the traction control unit; and a revolution rate sensor, wherein the torque command calculation unit is adapted to set the torque command to a value greater than zero regardless of the operation request when the revolution rate of the electrical motor is less than or equal to a predetermined value.
    Type: Application
    Filed: September 5, 2006
    Publication date: April 5, 2007
    Applicant: Honda Motor Co., Ltd.
    Inventors: Asao Uenodai, Takuya Shirasaka, Tohru Ikeda, Hisanori Yanagida
  • Publication number: 20070007058
    Abstract: A control apparatus for a fuel cell vehicle includes: a motor for driving the fuel cell vehicle; a motor control unit controlling driving and regenerative operations of the motor; a traction control unit suppressing slippage of drive wheels by controlling a driving force acting between tires and a road surface; a fuel cell generating electricity through electrochemical reaction by being supplied with reactant gases by a reactant gas supply unit and supplies electrical power to the motor; an electrical storage apparatus charged by power generated by the fuel cell and power regenerated by the motor; an output control unit controlling the output of the fuel cell; and a control unit controlling power consumption of the motor in advance of a change in a supply state of the reactant gases to the fuel cell due to execution of driving force control by the traction control unit.
    Type: Application
    Filed: June 30, 2006
    Publication date: January 11, 2007
    Applicant: Honda Motor Co., Ltd.
    Inventors: Asao Uenodai, Takuya Shirasaka, Tohru Ikeda, Hisanori Yanagida
  • Publication number: 20060278450
    Abstract: A management ECU of a control unit predicts the reduction degree of a system voltage according to an operational state of a motor based on the temperature of a fuel cell and a number of rotations of the motor, sets motor output restriction start voltage and motor output restriction end voltage which are threshold values of the system voltage for triggering an execution start and an execution end of a processing to restrict an output of the motor, and outputs them to a motor ECU. The motor ECU sets an output restriction coefficient that is a restriction rate in restricting the output of the motor based on a detected value of the system voltage and the motor output restriction start voltage and the motor output restriction end voltage, and restricts the output of the motor.
    Type: Application
    Filed: June 6, 2006
    Publication date: December 14, 2006
    Applicant: Honda Motor Co., Ltd.
    Inventors: Takuya Shirasaka, Satoshi Aoyagi, Asao Uenodai, Hibiki Saeki
  • Patent number: 6978665
    Abstract: To reduce errors of measurement of fuel consumption resulting from air remaining in piping of a hydrogen supply apparatus, a hydrogen supply method for measuring fuel consumption of a hydrogen fuel vehicle comprises; a step (S02) of prior to supplying hydrogen from a measurement hydrogen tank to the hydrogen fuel vehicle, supplying hydrogen from a dummy hydrogen tank to hydrogen supply piping connecting the measurement hydrogen tank and the hydrogen fuel vehicle, to purge air in the hydrogen supply piping, and a step (S03) of after filling of the hydrogen supply piping with hydrogen from the dummy hydrogen tank, supplying hydrogen from the measurement hydrogen tank to the hydrogen fuel vehicle via the hydrogen supply piping.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: December 27, 2005
    Assignee: Honda Motor Co., Ltd.
    Inventors: Satoshi Aoyagi, Osamu Sukagawa, Takuya Shirasaka
  • Publication number: 20040221819
    Abstract: To reduce errors of measurement of fuel consumption resulting from air remaining in piping of a hydrogen supply apparatus, a hydrogen supply method for measuring fuel consumption of a hydrogen fuel vehicle comprises; a step (S02) of prior to supplying hydrogen from a measurement hydrogen tank to the hydrogen fuel vehicle, supplying hydrogen from a dummy hydrogen tank to hydrogen supply piping connecting the measurement hydrogen tank and the hydrogen fuel vehicle, to purge air in the hydrogen supply piping, and a step (S03) of after filling of the hydrogen supply piping with hydrogen from the dummy hydrogen tank, supplying hydrogen from the measurement hydrogen tank to the hydrogen fuel vehicle via the hydrogen supply piping.
    Type: Application
    Filed: February 10, 2004
    Publication date: November 11, 2004
    Inventors: Satoshi Aoyagi, Osamu Sukagawa, Takuya Shirasaka
  • Patent number: 6638022
    Abstract: A hybrid vehicle includes: a metal V-belt type infinitely variable gear-change mechanism 20 whereby the rotation of an engine E is subjected to change in gear ratio, a forwards clutch 14 and a reverse brake 15 that perform engagement/disengagement control of the engine and the infinitely variable gear-change mechanism, and a second motor generator 50 capable of driving the drive wheels arranged parallel with the engine. The control device is provided with a first hydraulic pump 3 for engine drive, a second hydraulic pump 56 that is driven by an electric motor 55 for pump drive, and a forwards/reverse clutch control valve 73 that performs changeover control of supply of working hydraulic pressure to the forwards clutch 14 etc.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: October 28, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Eijirou Shimabukuro, Shigeru Ibaraki, Takuya Shirasaka, Makoto Kishida, Yutaka Tamagawa, Tetsuya Hasebe
  • Patent number: 6636788
    Abstract: A corrected torque command value P_TRQ which is produced by correcting a torque command value TRQ with a torque command correcting unit 34 is substantially proportional to the armature current of an electric motor. Using the corrected torque command value P_TRQ and its average value P_ATRQ, an inferred temperature change &Dgr;tf of the electric motor is determined in each predetermined cycle time. The inferred temperature change &Dgr;tf calculated in a fuzzy inference operation, for example. The inferred temperature change &Dgr;tf is integrated by an integrating unit 37 to determine an accumulated temperature change &Dgr;Tf. The output of the electric motor is limited when the accumulated temperature change &Dgr;Tf exceeds a predetermined value.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: October 21, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yutaka Tamagawa, Takuya Shirasaka
  • Publication number: 20020147530
    Abstract: A corrected torque command value P_TRQ which is produced by correcting a torque command value TRQ with a torque command correcting unit 34 is substantially proportional to the armature current of an electric motor. Using the corrected torque command value P_TRQ and its average value P_ATRQ, an inferred temperature change &Dgr;tf of the electric motor is determined in each predetermined cycle time. The inferred temperature change &Dgr;tf calculated in a fuzzy inference operation, for example. The inferred temperature change &Dgr;tf is integrated by an integrating unit 37 to determine an accumulated temperature change &Dgr;Tf. The output of the electric motor is limited when the accumulated temperature change &Dgr;Tf exceeds a predetermined value.
    Type: Application
    Filed: April 3, 2002
    Publication date: October 10, 2002
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yutaka Tamagawa, Takuya Shirasaka
  • Publication number: 20010016165
    Abstract: A hybrid vehicle includes: a metal V-belt type infinitely variable gear-change mechanism 20 whereby the rotation of an engine E is subjected to change in gear ratio, a forwards clutch 14 and a reverse brake 15 that perform engagement/disengagement control of the engine and the infinitely variable gear-change mechanism, and a second motor generator 50 capable of driving the drive wheels arranged parallel with the engine. The control device is provided with a first hydraulic pump 3 for engine drive, a second hydraulic pump 56 that is driven by an electric motor 55 for pump drive, and a forwards/reverse clutch control valve 73 that performs changeover control of supply of working hydraulic pressure to the forwards clutch 14 etc.
    Type: Application
    Filed: January 5, 2001
    Publication date: August 23, 2001
    Inventors: Eijirou Shimabukuro, Shigeru Ibaraki, Takuya Shirasaka, Makoto Kishida, Yutaka Tamagawa, Tetsuya Hasebe