Patents by Inventor Marc-Andre Golkowski

Marc-Andre Golkowski 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).

  • Patent number: 12291984
    Abstract: A method for evaluating a sensor signal of an exhaust NOx sensor, which is disposed downstream of a three-way catalytic converter in an exhaust system of a spark ignition internal combustion engine. An ammonia factor is modeled downstream of the three-way catalytic converter using an ammonia formation model. A NOx emission is modeled in the exhaust system downstream of the three-way catalytic converter using a NOx model. The modeled ammonia emissions and the modeled NOx emission are separated by a separation algorithm using the sensor signal of the exhaust NOx sensor. The separation algorithm provides quantitative information about the tailpipe ammonia emissions and the tailpipe NOx emissions of the spark ignition internal combustion engine. An engine control unit and an internal combustion engine for carrying out such a method are also provided.
    Type: Grant
    Filed: March 24, 2024
    Date of Patent: May 6, 2025
    Assignee: Volkswagen Aktiengesellschaft
    Inventors: Marc-Andre Golkowski, Till Stoetzel
  • Publication number: 20240318586
    Abstract: A method for evaluating a sensor signal of an exhaust NOx sensor, which is disposed downstream of a three-way catalytic converter in an exhaust system of a spark ignition internal combustion engine. An ammonia factor is modeled downstream of the three-way catalytic converter using an ammonia formation model. A NOx emission is modeled in the exhaust system downstream of the three-way catalytic converter using a NOx model. The modeled ammonia emissions and the modeled NOx emission are separated by a separation algorithm using the sensor signal of the exhaust NOx sensor. The separation algorithm provides quantitative information about the tailpipe ammonia emissions and the tailpipe NOx emissions of the spark ignition internal combustion engine. An engine control unit and an internal combustion engine for carrying out such a method are also provided.
    Type: Application
    Filed: March 24, 2024
    Publication date: September 26, 2024
    Applicant: Volkswagen Aktiengesellschaft
    Inventors: Marc-Andre GOLKOWSKI, Till STOETZEL
  • Patent number: 11668223
    Abstract: A reduction method for a catalytic converter in an exhaust system of an internal combustion engine for reducing the oxygen content in the catalytic converter, in particular after an overrun fuel cutoff mode of the internal combustion engine, the method including first injection of fuel into a first cylinder, the first injection taking place after an ignition point in time of a compression stroke of a first working cycle of the cylinder and including an introduction of the injected fuel from the cylinder into the catalytic converter during an exhaust stroke of the first cylinder.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: June 6, 2023
    Assignee: Volkswagen Aktiengesellschaft
    Inventors: Marc-Andre Golkowski, Stephan Schemann, Christian Arenz, Christopher Lueck
  • Publication number: 20220154622
    Abstract: A reduction method for a catalytic converter in an exhaust system of an internal combustion engine for reducing the oxygen content in the catalytic converter, in particular after an overrun fuel cutoff mode of the internal combustion engine, the method including first injection of fuel into a first cylinder, the first injection taking place after an ignition point in time of a compression stroke of a first working cycle of the cylinder and including an introduction of the injected fuel from the cylinder into the catalytic converter during an exhaust stroke of the first cylinder.
    Type: Application
    Filed: November 17, 2021
    Publication date: May 19, 2022
    Applicant: Volkswagen Aktiengesellschaft
    Inventors: Marc-Andre Golkowski, Stephan Schemann, Christian Arenz, Christopher Lueck