Patents by Inventor Laurentiu Vaduva

Laurentiu Vaduva 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).

  • System and method for backpressure compensation for controlling exhaust gas particulate emissions
    Patent number: 7437874
    Abstract: A method for controlling exhaust gas particulate emissions from a compression ignition internal combustion engine having a variable geometry turbocharger (VGT) includes the steps of determining backpressure across the engine and air mass flow into the engine, closing vanes of the VGT to provide air mass flow increase when backpressure is increasing, and stopping the step of closing the vanes of the VGT when a decrease in rate of change of air mass flow is determined.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: October 21, 2008
    Assignee: Detroit Diesel Corporation
    Inventors: Ravishankar Ramamurthy, Laurentiu Vaduva, Admir Krejo
  • System and method for backpressure compensation for controlling exhaust gas particulate emissions
    Publication number: 20060288701
    Abstract: A method for controlling exhaust gas particulate emissions from a compression ignition internal combustion engine having a variable geometry turbocharger (VGT) includes the steps of determining backpressure across the engine and air mass flow into the engine, closing vanes of the VGT to provide air mass flow increase when backpressure is increasing, and stopping the step of closing the vanes of the VGT when a decrease in rate of change of air mass flow is determined.
    Type: Application
    Filed: March 10, 2005
    Publication date: December 28, 2006
    Applicant: Detroit Diesel Corporation
    Inventors: Ravishankar Ramamurthy, Laurentiu Vaduva, Admir Kreso
  • Influence of engine parameters on condensation protection strategies
    Patent number: 7079938
    Abstract: A control and method for an internal combustion engine that includes an exhaust gas recirculation system to predict an intake manifold critical temperature (dew point) at which condensation would occur upon entry into exhaust gas recirculation. The control calculates the intake manifold critical temperature (IMT_Critical) as a function of predetermined, sensed or assumed values by processing an equation whose variables are occupied by the values. The control commands adjustments of exhaust gas recirculation operation in response to the calculation, preferably after the actual intake manifold temperature exceeds the IMT_Critical for a predetermined time.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: July 18, 2006
    Assignee: Detroit Diesel Corporation
    Inventors: Sameer Bhargava, Ravishankar Ramamurthy, Laurentiu Vaduva
  • INFLUENCE OF ENGINE PARAMETERS ON CONDENSATION PROTECTION STRATEGIES
    Publication number: 20050021218
    Abstract: A control and method for an internal combustion engine that includes an exhaust gas recirculation system to predict an intake manifold critical temperature (dew point) at which condensation would occur upon entry into exhaust gas recirculation. The control calculates the intake manifold critical temperature (IMT_Critical) as a function of predetermined, sensed or assumed values by processing an equation whose variables are occupied by the values. The control commands adjustments of exhaust gas recirculation operation in response to the calculation, preferably after the actual intake manifold temperature exceeds the IMT_Critical for a predetermined time.
    Type: Application
    Filed: July 25, 2003
    Publication date: January 27, 2005
    Inventors: Sameer Bhargava, Ravishankar Ramamurthy, Laurentiu Vaduva