Patents by Inventor Erika Schaefer

Erika Schaefer 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 compensating valve drift in an internal combustion engine
    Patent number: 10690076
    Abstract: A method for compensating valve drift in an internal combustion engine having a variable valve train; in the method, an actual value of the current operating state of the internal combustion engine is determined in an air expenditure map and compared to a desired value of the air expenditure map, whereupon the air expenditure map is corrected.
    Type: Grant
    Filed: July 7, 2016
    Date of Patent: June 23, 2020
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Jan Boyde, Wolfgang Fimml, Erika Schäfer
  • Method for operating an internal combustion engine
    Patent number: 10316764
    Abstract: A method and an arrangement for operating an internal combustion engine. According to the method, a load threshold is defined below which load control by a throttle valve is performed.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: June 11, 2019
    Assignee: MTU FRIEDRICHSHAFEN GMBH
    Inventors: Jan Boyde, Wolfgang Fimml, Erika Schäfer
  • METHOD FOR COMPENSATING VALVE DRIFT IN AN INTERNAL COMBUSTION ENGINE
    Publication number: 20180195452
    Abstract: A method for compensating valve drift in an internal combustion engine having a variable valve train; in the method, an actual value of the current operating state of the internal combustion engine is determined in an air expenditure map and compared to a desired value of the air expenditure map, whereupon the air expenditure map is corrected.
    Type: Application
    Filed: July 7, 2016
    Publication date: July 12, 2018
    Inventors: Jan BOYDE, Wolfgang FIMML, Erika SCHÄFER
  • METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE
    Publication number: 20160369708
    Abstract: A method and an arrangement for operating an internal combustion engine. According to the method, a load threshold is defined below which load control by a throttle valve is performed.
    Type: Application
    Filed: February 5, 2015
    Publication date: December 22, 2016
    Inventors: Jan BOYDE, Wolfgang FIMML, Erika SCHÄFER
  • METHOD FOR CONTROLLING AND REGULATING AN INTERNAL COMBUSTION ENGINE ACCORDING TO THE HCCI COMBUSTION METHOD
    Publication number: 20150107550
    Abstract: A method is proposed for controlling and regulating an internal combustion engine according to the HCCI combustion method, in which a first fuel in a basic mixture is ignited using a pilot fuel, and in which the fuel quantities of the first fuel and the pilot fuel are changed to represent an operating point of the internal combustion engine. The invention is characterized in that a target combustion energy (VE(SL)) is calculated as a function of a power demand and, based on the target combustion energy (VE(SL)), the fuel quantity of the first fuel and the fuel quantity of the pilot fuel are determined using a distribution factor (CHI), wherein the distribution factor (CHI) is calculated as a function of an actual combustion position (VL(IST)) to a target combustion position (VL(SL)) using a combustion position controller (18).
    Type: Application
    Filed: April 15, 2013
    Publication date: April 23, 2015
    Applicant: MTU Friedrichshafen GmbH
    Inventors: Jörg Remele, Christina Sauer, Aron Toth, Andreas Flohr, Alexander Bernhard, Florian Bach, Erika Schaefer, Ulrich Spicher, Christoph Teetz