Patents by Inventor Rama Munukur

Rama Munukur 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).

  • Motor torque management associated with audible noise for a hybrid powertrain system
    Patent number: 8280598
    Abstract: A method for operating a hybrid powertrain system includes monitoring operation of the torque machine, and limiting the motor torque output from the torque machine to a maximum allowable motor torque that is associated with an acceptable audible noise level when the motor speed of the torque machine is within a motor speed range associated with objectionable audible noise.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: October 2, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Rama Munukur, Goro Tamai, Sean W. McGrogan
  • Regeneration capacity control method for a battery
    Patent number: 8228035
    Abstract: A method for controlling regeneration of a battery includes determining a scaled value for a state of charge of the battery, a scaled value for a battery temperature and a scaled value for a maximum charging power of the battery. An actual battery temperature is then compared with a predetermined operating temperature. When the actual battery temperature is less than the predetermined operating temperature, an actual regeneration amount is calculated based upon the scaled value for the state of charge of the battery and the scaled value for the battery temperature. When the actual battery temperature is greater than the predetermined operating temperature, the actual regeneration amount is based upon the scaled value for the state of charge of the battery, the scaled value for the battery temperature, and the scaled value for the maximum charging power of the battery.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: July 24, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Rama Munukur, Goro Tamai, Ahmad M Bazzi
  • MOTOR TORQUE MANAGEMENT ASSOCIATED WITH AUDIBLE NOISE FOR A HYBRID POWERTRAIN SYSTEM
    Publication number: 20110015813
    Abstract: A method for operating a hybrid powertrain system includes monitoring operation of the torque machine, and limiting the motor torque output from the torque machine to a maximum allowable motor torque that is associated with an acceptable audible noise level when the motor speed of the torque machine is within a motor speed range associated with objectionable audible noise.
    Type: Application
    Filed: July 16, 2009
    Publication date: January 20, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Rama Munukur, Goro Tamai, Sean W. McGrogan
  • REGENERATION CAPACITY CONTROL METHOD FOR A BATTERY
    Publication number: 20100301867
    Abstract: A method for controlling regeneration of a battery includes determining a scaled value for a state of charge of the battery, a scaled value for a battery temperature and a scaled value for a maximum charging power of the battery. An actual battery temperature is then compared with a predetermined operating temperature. When the actual battery temperature is less than the predetermined operating temperature, an actual regeneration amount is calculated based upon the scaled value for the state of charge of the battery and the scaled value for the battery temperature. When the actual battery temperature is greater than the predetermined operating temperature, the actual regeneration amount is based upon the scaled value for the state of charge of the battery, the scaled value for the battery temperature, and the scaled value for the maximum charging power of the battery.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 2, 2010
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Rama Munukur, Goro Tamai, Ahmad M. Bazzi