Patents by Inventor Steven P. Gravante

Steven P. Gravante 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).

  • Forced regeneration of a diesel particulate filter
    Patent number: 6829890
    Abstract: An engine control system (22) of a diesel engine (20) that powers a motor vehicle processes data in execution of a strategy (FIG. 4) to provide control of both timing and duration of forced regeneration of a diesel particulate filter (42). The overall strategy is a hybrid of model-based and closed-loop control strategies. Redundant elements of the strategy (FIG. 6) determine when forced regeneration is called for. Forced regeneration is initiated by retarding the timing of the start of main fuel injection (100). Fueling is then adjusted (98) both to enhance catalytic action and to make the process transparent to a driver of the vehicle.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: December 14, 2004
    Assignee: International Engine Intellectual Property Company, LLC
    Inventors: Xinqun Gui, Steven P. Gravante, Shouxian Ren, Pranab K. Das
  • Forced regeneration of a diesel particulate filter
    Publication number: 20040031262
    Abstract: An engine control system (22) of a diesel engine (20) that powers a motor vehicle processes data in execution of a strategy (FIG. 4) to provide control of both timing and duration of forced regeneration of a diesel particulate filter (42). The overall strategy is a hybrid of model-based and closed-loop control strategies. Redundant elements of the strategy (FIG. 6) determine when forced regeneration is called for. Forced regeneration is initiated by retarding the timing of the start of main fuel injection (100). Fueling is then adjusted (98) both to enhance catalytic action and to make the process transparent to a driver of the vehicle.
    Type: Application
    Filed: August 13, 2002
    Publication date: February 19, 2004
    Inventors: Xinqun Gui, Steven P. Gravante, Shouxian Ren, Pranab K. Das