Patents by Inventor Karma V. Sangwan

Karma V. Sangwan 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).

  • Humidity-based defog control method for a vehicle climate control system
    Patent number: 7337622
    Abstract: A vehicle climate control system develops a fog index based on relative humidity at or near the inner surface of the windshield, and uses the fog index to variably override the normal control settings. The relative humidity is combined with a pair of humidity thresholds to form a dimensionless fog index, and fog index values within a predetermined range are applied to a variable path function for transitioning between existing control settings and control settings that maximize defogging.
    Type: Grant
    Filed: January 6, 2005
    Date of Patent: March 4, 2008
    Assignee: Delphi Technologies, Inc.
    Inventors: Mingyu Wang, Charles A. Archibald, Karma V. Sangwan, Thomas M. Urbank
  • Air pressure control
    Patent number: 4989499
    Abstract: An air pressure control system for the passenger compartment of a vehicle including an open-loop for generating an open-loop valve position command, a closed-loop for generating a closed-loop correction signal, and a valve control for positioning a valve as a combined function of the open-loop position command and the closed-loop correction command, thereby regulating the flow of air from the passenger compartment and the compartment pressure.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: February 5, 1991
    Assignee: General Motors Corporation
    Inventors: Ardeean Scoccia, Karma V. Sangwan, George H. Johnson