Patents by Inventor Hiromi Murao

Hiromi Murao 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).

  • Control device for motor fan of vehicle
    Patent number: 6802185
    Abstract: A control device for a motor fan of a vehicle, which controls the motor fan to cool a radiator for engine coolant and a condenser for air conditioner refrigerant, includes: a first command value calculation section which calculates a first command value for control of the motor fan according to refrigerant pressure; a second command value calculation section which calculates a second command value for control of the motor fan according to coolant temperature; a first target value setting section which sets the greater of the first command value and the second command value as a first target value; a second target value setting section which obtains a second target value for control of the motor fan which corresponds to a total torque which is smaller than a total torque of a torque of an alternator and a torque of a compressor corresponding to the first target value; and a control section which controls the motor fan according to the second target value.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: October 12, 2004
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tomofumi Furukawa, Hiromi Murao, Kazuhira Kobayashi
  • Control device for motor fan of vehicle
    Publication number: 20040016246
    Abstract: A control device for a motor fan of a vehicle, which controls the motor fan to cool a radiator for engine coolant and a condenser for air conditioner refrigerant, includes: a first command value calculation section which calculates a first command value for control of the motor fan according to refrigerant pressure; a second command value calculation section which calculates a second command value for control of the motor fan according to coolant temperature; a first target value setting section which sets the greater of the first command value and the second command value as a first target value; a second target value setting section which obtains a second target value for control of the motor fan which corresponds to a total torque which is smaller than a total torque of a torque of an alternator and a torque of a compressor corresponding to the first target value; and a control section which controls the motor fan according to the second target value.
    Type: Application
    Filed: June 25, 2003
    Publication date: January 29, 2004
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Tomofumi Furukawa, Hiromi Murao, Kazuhira Kobayashi