Patents by Inventor Mohammed Rafi H

Mohammed Rafi H 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).

  • Fuel delivery system
    Patent number: 10711726
    Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a fuel rail, a pressure sensor, a relief valve, and a controller. The controller is configured to receive a signal indicative of a fuel rail pressure, identify exceeding of the fuel rail pressure beyond a first threshold, identify the fuel rail pressure drop below a second threshold, and initiate a counter for a first predefined amount of time accordingly. The controller is also configured to identify if the fuel rail pressure drops below a third threshold within the first predefined amount of time, and identify if the fuel rail pressure remains below the third threshold for at least a second predefined amount of time. The controller is further configured to determine an open status of the relief valve based, at least in part, on the identification.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: July 14, 2020
    Assignee: Caterpillar Inc.
    Inventors: James Steven Ulstad, Ye Tian, Purvarag S. Shah, Kranti Kumar Nellutla, Sasidhar Rayasam, Brian P. Brennan, Purna Chandra Sekhar Mokkarala, Mohammed Rafi H, Gregory Lance Armstrong
  • FUEL DELIVERY SYSTEM
    Publication number: 20190136787
    Abstract: A fuel delivery system for an engine is provided. The fuel delivery system includes a fuel rail, a pressure sensor, a relief valve, and a controller. The controller is configured to receive a signal indicative of a fuel rail pressure, identify exceeding of the fuel rail pressure beyond a first threshold, identify the fuel rail pressure drop below a second threshold, and initiate a counter for a first predefined amount of time accordingly. The controller is also configured to identify if the fuel rail pressure drops below a third threshold within the first predefined amount of time, and identify if the fuel rail pressure remains below the third threshold for at least a second predefined amount of time. The controller is further configured to determine an open status of the relief valve based, at least in part, on the identification.
    Type: Application
    Filed: November 3, 2017
    Publication date: May 9, 2019
    Applicant: Caterpillar Inc.
    Inventors: James Steven Ulstad, Ye Tian, Purvarag S. Shah, Kranti Kumar Nellutla, Sasidhar Rayasam, Brian P. Brennan, Purna Chandra Sekhar Mokkarala, Mohammed Rafi H, Gregory Lance Armstrong