Patents by Inventor Rafat Hattar

Rafat Hattar 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).

  • METHOD FOR REGENERATING A PARTICLE FILTER FOR AN INTERNAL COMBUSTION ENGINE
    Publication number: 20190010882
    Abstract: A method and system for regenerating a gasoline particle filter of an internal combustion engine is provided in which a value (Q) for a quantity of soot collected inside of the gasoline particle filter and a value (T) for a temperature of the gasoline particle filter are determined. The internal combustion engine is operated in a lean mode when the value (Q) for the soot quantity is greater than a first threshold, and the value (T) for the temperature of the gasoline particle filter is greater than a threshold.
    Type: Application
    Filed: July 9, 2018
    Publication date: January 10, 2019
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Alexander Michel, Jochen Grieser, Rafat Hattar, Markus Kraft, Simon Schiesser, Daniel Siebert
  • Systems and methods for performing prognosis of fuel delivery systems
    Patent number: 10161370
    Abstract: An engine fuel delivery system includes a fuel pump having a pumping chamber to increase fuel pressure and a closeable inlet valve, and a fuel rail to communicate pressurized fuel received from the fuel pump to at least one engine cylinder. The engine fuel delivery system also includes a controller programmed to issue a control signal to periodically close the inlet valve to generate a setpoint fuel pressure within the pumping chamber. The controller is also programmed to adjust a control signal gain value in response to deviation in an outlet fuel pressure relative to the setpoint fuel pressure. The controller is further programmed to issue a warning message in response to the control signal gain being adjusted by more than a predetermined threshold from a calibrated gain value.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: December 25, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Azeem Sarwar, Chaitanya Sankavaram, Rafat Hattar, Matthew Hamilton, Jonathan Pung
  • SYSTEMS AND METHODS FOR PERFORMING PROGNOSIS OF FUEL DELIVERY SYSTEMS
    Publication number: 20170298883
    Abstract: An engine fuel delivery system includes a fuel pump having a pumping chamber to increase fuel pressure and a closeable inlet valve, and a fuel rail to communicate pressurized fuel received from the fuel pump to at least one engine cylinder. The engine fuel delivery system also includes a controller programmed to issue a control signal to periodically close the inlet valve to generate a setpoint fuel pressure within the pumping chamber. The controller is also programmed to adjust a control signal gain value in response to deviation in an outlet fuel pressure relative to the setpoint fuel pressure. The controller is further programmed to issue a warning message in response to the control signal gain being adjusted by more than a predetermined threshold from a calibrated gain value.
    Type: Application
    Filed: April 13, 2016
    Publication date: October 19, 2017
    Inventors: Azeem Sarwar, Chaitanya Sankavaram, Rafat Hattar, Matthew Hamilton, Jonathan Pung