Patents by Inventor Vallinayagam Raman

Vallinayagam Raman 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).

  • Publication number: 20250034468
    Abstract: A method for blending fuel streams to produce a low-sulfur distillate blend includes formulating a blend composition using a model, calculating a projected stability of the determined composition using a predictive stability model, and forming a low-sulfur distillate blend based on the determined composition by mixing determined input streams at the blending ratio. A low-sulfur distillate blend (LSDB) for marine engines includes a blend of residual and distillate fuel streams that satisfies the IMO global sulfur cap of 0.5 wt % sulfur and is stable without any separation of blend components.
    Type: Application
    Filed: July 27, 2023
    Publication date: January 30, 2025
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Vallinayagam Raman, Junseok Chang
  • Publication number: 20240328345
    Abstract: A marine engine system includes a marine engine, a turbocharger comprising a compressor, an air valve positioned in a flow path connecting the compressor and a mixing chamber to split flow between an intake air stream and a recovered air stream directed to a separation unit, an air operated compressor to generate a separator feed stream by increasing the pressure of the recovered air stream, the separation unit configured to concentrate nitrogen from the separator feed stream to generate a nitrogen-enriched air stream and a nitrogen-depleted air stream, a mixing chamber to combine the nitrogen-enriched air stream and the intake air stream to generate a nitrogen-enriched intake air stream, and a controller communicatively coupled to the air valve to direct the air valve to variably adjust the split between the intake air stream and the recovered air stream.
    Type: Application
    Filed: March 30, 2023
    Publication date: October 3, 2024
    Applicant: Saudi Arabian Oil Company
    Inventors: Vallinayagam Raman, Junseok Chang
  • Patent number: 12104522
    Abstract: A marine engine system includes a marine engine, a turbocharger comprising a compressor, an air valve positioned in a flow path connecting the compressor and a mixing chamber to split flow between an intake air stream and a recovered air stream directed to a separation unit, an air operated compressor to generate a separator feed stream by increasing the pressure of the recovered air stream, the separation unit configured to concentrate nitrogen from the separator feed stream to generate a nitrogen-enriched air stream and a nitrogen-depleted air stream, a mixing chamber to combine the nitrogen-enriched air stream and the intake air stream to generate a nitrogen-enriched intake air stream, and a controller communicatively coupled to the air valve to direct the air valve to variably adjust the split between the intake air stream and the recovered air stream.
    Type: Grant
    Filed: March 30, 2023
    Date of Patent: October 1, 2024
    Assignee: Saudi Arabian Oil Company
    Inventors: Vallinayagam Raman, Junseok Chang
  • Patent number: 11674419
    Abstract: An engine system includes an engine configured to combust liquid natural gas and generate an exhaust gas comprising methane; a catalytic reactor coupled downstream of the engine and configured to convert methane into a product through one or more of oxidative coupling of methane (OCM) reaction and steam methane reforming (SMR) reaction; and a recirculation loop configured to recirculate at least a part of the product back to the engine.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: June 13, 2023
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Vallinayagam Raman, Seung-Hak Choi, Junseok Chang
  • Publication number: 20230160328
    Abstract: An engine system includes an engine configured to combust liquid natural gas and generate an exhaust gas comprising methane; a catalytic reactor coupled downstream of the engine and configured to convert methane into a product through one or more of oxidative coupling of methane (OCM) reaction and steam methane reforming (SMR) reaction; and a recirculation loop configured to recirculate at least a part of the product back to the engine.
    Type: Application
    Filed: November 24, 2021
    Publication date: May 25, 2023
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Vallinayagam Raman, Seung-Hak Choi, Junseok Chang
  • Patent number: 11473550
    Abstract: According to one or more embodiments presently described, a method of operating an internal combustion engine that includes injecting fuel into a combustion chamber to form an air-fuel mixture, where the combustion chamber includes a cylinder head, cylinder sidewalls, and a piston that reciprocates within the cylinder sidewalls. The method may also include detecting pre-ignition of the air-fuel mixture during a detected intake or compression stroke of the piston, determining that a super knock condition could occur, and mitigating formation of a super knock condition by deploying a super knock countermeasure within the detected compression stroke.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: October 18, 2022
    Assignees: King Abdullah University of Science and Technology, Saudi Arabian Oil Company
    Inventors: Eshan Singh, Vedharaj Sivasankaralingam, Vallinayagam Raman, Mohammed Jaasim Mubarak Ali, Hong G. Im, Kai J. Morganti, Gautam T. Kalghatgi, Robert W. Dibble
  • Patent number: 11391230
    Abstract: A method for operating an internal combustion engine includes moving a piston downward from a top dead center position to a bottom dead center position expanding a combustion chamber in an intake stroke, dispensing a first portion of fuel into the combustion chamber, subsequent to moving the piston downward in the intake stroke, moving the piston upward in the vertical direction compressing the combustion chamber in a compression stroke, subsequent to moving the piston upward in the compression stroke, moving the piston downward in the vertical direction in an expansion stroke, while moving the piston downward in the vertical direction in the expansion stroke, dispensing a second portion of fuel into the combustion chamber, and while moving the piston downward in the expansion stroke, igniting at least a part of the first portion of fuel and the second portion of fuel.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: July 19, 2022
    Assignee: Saudi Arabian Oil Company
    Inventors: Vallinayagam Raman, Yoann Viollet, Junseok Chang
  • Publication number: 20220034268
    Abstract: A method for operating an internal combustion engine includes passing air to a separation unit, separating the air into a nitrogen-enriched air stream and an oxygen-enriched air stream with the separation unit, passing the nitrogen-enriched air stream to a mixing chamber in communication with the separation unit, detecting a nitrogen content within the nitrogen-enriched air stream, based at least in part on the detected nitrogen content within the nitrogen-enriched air stream, moving an air valve between a closed position, in which the air valve restricts flow of an air stream to the mixing chamber, and an open position, in which the air stream flows to the mixing chamber through the air valve, passing the nitrogen-enriched air stream to a combustion chamber, passing a fuel to the combustion chamber, and combusting the fuel and the nitrogen-enriched air stream within the combustion chamber, thereby moving a piston within the combustion chamber.
    Type: Application
    Filed: March 4, 2021
    Publication date: February 3, 2022
    Applicant: Saudi Arabian Oil Company
    Inventors: Vallinayagam Raman, Seung-Hak Choi, Junseok Chang
  • Publication number: 20210140380
    Abstract: A method for operating an internal combustion engine includes moving a piston downward from a top dead center position to a bottom dead center position expanding a combustion chamber in an intake stroke, dispensing a first portion of fuel into the combustion chamber, subsequent to moving the piston downward in the intake stroke, moving the piston upward in the vertical direction compressing the combustion chamber in a compression stroke, subsequent to moving the piston upward in the compression stroke, moving the piston downward in the vertical direction in an expansion stroke, while moving the piston downward in the vertical direction in the expansion stroke, dispensing a second portion of fuel into the combustion chamber, and while moving the piston downward in the expansion stroke, igniting at least a part of the first portion of fuel and the second portion of fuel.
    Type: Application
    Filed: November 7, 2019
    Publication date: May 13, 2021
    Applicant: Saudi Arabian Oil Company
    Inventors: Vallinayagam Raman, Yoann Viollet, Junseok Chang
  • Publication number: 20200263651
    Abstract: According to one or more embodiments presently described, a method of operating an internal combustion engine that includes injecting fuel into a combustion chamber to form an air-fuel mixture, where the combustion chamber includes a cylinder head, cylinder sidewalls, and a piston that reciprocates within the cylinder sidewalls. The method may also include detecting pre-ignition of the air-fuel mixture during a detected intake or compression stroke of the piston, determining that a super knock condition could occur, and mitigating formation of a super knock condition by deploying a super knock countermeasure within the detected compression stroke.
    Type: Application
    Filed: February 20, 2019
    Publication date: August 20, 2020
    Applicants: King Abdullah University of Science and Technology, Saudi Arabian Oil Company
    Inventors: Eshan Singh, Vedharaj Sivasankaralingam, Vallinayagam Raman, Mohammed Jaasim Mubarak Ali, Hong G. Im, Kai J. Morganti, Gautam T. Kalghatgi, Robert W. Dibble