Patents by Inventor Matthias KREFT

Matthias KREFT 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 operating an internal combustion engine with an exhaust-gas turbocharger having variable turbine geometry
    Patent number: 11339711
    Abstract: The invention relates to a method for operating an internal combustion engine (100) having an exhaust-gas turbocharger (5, 10, 15) for compressing the air fed to the internal combustion engine (100), wherein a drive power of a turbine (10) of the exhaust-gas turbocharger (5, 10, 15) in an exhaust tract (20) of the internal combustion engine (100) is changed through variation of a turbine geometry of the turbine (10), wherein, in a first control algorithm (I), a setpoint charge pressure (pLSoll) at the outlet of the compressor (5) of the exhaust-gas turbocharger (5, 10, 15) in the air feed tract (50) upstream of the combustion motor (55) is controlled in a manner dependent on a setpoint exhaust-gas back pressure (pT1Soll) to be set in an exhaust tract (20) downstream of the combustion motor (55) upstream of the turbine (10) of the internal combustion engine (100), wherein the setpoint charge pressure (pLSoll) is assigned an opening cross-sectional area of the turbine (10), which is controlled, by means of an a
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: May 24, 2022
    Assignee: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventors: Sebastian Heinken, Matthias Kreft
  • METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE WITH AN EXHAUST-GAS TURBOCHARGER HAVING VARIABLE TURBINE GEOMETRY
    Publication number: 20200309023
    Abstract: The invention relates to a method for operating an internal combustion engine (100) having an exhaust-gas turbocharger (5, 10, 15) for compressing the air fed to the internal combustion engine (100), wherein a drive power of a turbine (10) of the exhaust-gas turbocharger (5, 10, 15) in an exhaust tract (20) of the internal combustion engine (100) is changed through variation of a turbine geometry of the turbine (10), wherein, in a first control algorithm (I), a setpoint charge pressure (pLSoll) at the outlet of the compressor (5) of the
    Type: Application
    Filed: April 5, 2018
    Publication date: October 1, 2020
    Applicant: VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventors: Sebastian HEINKEN, Matthias KREFT