Patents by Inventor Stephan Olbrich

Stephan Olbrich 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: 20230216070
    Abstract: The invention relates to a method for fueling fuel cell systems (Sys A, Sys B) which are operated in an assembly (10) of a plurality of fuel cell systems (Sys A, Sys B), and to a fuel cell system assembly (10). According to the invention, a method is provided by means of which a load (100) operated by the assembly (10) can continue to be operated while a fueling process is carried out by a fueling device 20 assigned to the fuel cells (FC 1, FC 2) of the fuel cell system (Sys A, Sys B).
    Type: Application
    Filed: April 14, 2021
    Publication date: July 6, 2023
    Inventors: Bilge Manga, Christian Krause, Stephan Olbrich, Stephan Strahl
  • Patent number: 10054077
    Abstract: A method for operating a fuel injector having at least one injection orifice that is controlled by an injector needle, in which pressure variations during the opening and/or closing of the injector needle are ascertained with the aid of a sensor. In order to determine the opening/closing instant of the injector needle, a variable that characterizes the velocity of sound of a pressure wave by the opening and/or closing is measured, and the wave propagation time, by which the needle or valve opening/closing instant is corrected, is inferred therefrom.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: August 21, 2018
    Assignee: ROBERT BOSCH GMBH
    Inventors: Hanna Zimmer, Stephan Olbrich
  • Publication number: 20170321621
    Abstract: A method for operating a fuel injector having at least one injection orifice that is controlled by an injector needle, in which pressure variations during the opening and/or closing of the injector needle are ascertained with the aid of a sensor. In order to determine the opening/closing instant of the injector needle, a variable that characterizes the velocity of sound of a pressure wave by the opening and/or closing is measured, and the wave propagation time, by which the needle or valve opening/closing instant is corrected, is inferred therefrom.
    Type: Application
    Filed: November 11, 2015
    Publication date: November 9, 2017
    Inventors: Hanna Zimmer, Stephan Olbrich
  • Patent number: 9429093
    Abstract: A fuel injection system for an internal combustion engine in which pressurized fuel is made available in a pressure accumulator and a fuel pressure prevailing in the pressure accumulator is ascertained with the aid of a pressure sensor and in which the fuel enters a combustion chamber of the internal combustion engine through at least one fuel injection device. A slope of a curve, which links a pressure difference in the pressure accumulator during a fuel injection to an injected fuel quantity, is ascertained and the fuel pressure prevailing in the pressure accumulator is inferred from the slope.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: August 30, 2016
    Assignee: ROBERT BOSCH GMBH
    Inventors: Lars Empacher, Rene Zieher, Stephan Olbrich, Michael Schenk
  • Publication number: 20140100761
    Abstract: A fuel injection system for an internal combustion engine in which pressurized fuel is made available in a pressure accumulator and a fuel pressure prevailing in the pressure accumulator is ascertained with the aid of a pressure sensor and in which the fuel enters a combustion chamber of the internal combustion engine through at least one fuel injection device. A slope of a curve, which links a pressure difference in the pressure accumulator during a fuel injection to an injected fuel quantity, is ascertained and the fuel pressure prevailing in the pressure accumulator is inferred from the slope.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 10, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventors: Lars EMPACHER, Rene ZIEHER, Stephan OLBRICH, Michael SCHENK
  • Patent number: 8290687
    Abstract: A method for determining a fuel mass of a single injection that has been injected into at least one combustion chamber of a combustion engine with at least one injection under high pressure. The method includes determining a correction variable for the single injection with the aid of a comparison of a measure for the actual amount of the injected fuel of at least one test injection, which takes place due to a measure for a default nominal amount of a desired single injection, and a measure for the nominal amount of the test injection. The method additionally includes executing a plurality of timely directly successive test injections.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: October 16, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Stephan Olbrich, Wolfgang Beuer, Andreas Sommerer, Steffen Meyer-Salfeld
  • Patent number: 7991538
    Abstract: In a fuel system of an internal combustion engine, the fuel quantity injected into a combustion chamber is a function of an activation period, during which a fuel injection device is activated. A pressure sensor detects the pressure in the fuel rail and provides a signal. The pressure in the fuel rail may be regulated to a setpoint pressure using a setting unit and employing the signal provided by the pressure sensor.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: August 2, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Stephan Olbrich, Rainer Peck, Christian Kriechbaum, Michael Schenk, Steffen Meyer-Salfeld, Rene Zieher, Markus Viereck
  • Publication number: 20100030454
    Abstract: A method for determining a fuel mass of a single injection that has been injected into at least one combustion chamber of a combustion engine with at least one injection under high pressure. The method includes determining a correction variable for the single injection with the aid of a comparison of a measure for the actual amount of the injected fuel of at least one test injection, which takes place due to a measure for a default nominal amount of a desired single injection, and a measure for the nominal amount of the test injection. The method additionally includes executing a plurality of timely directly successive test injections.
    Type: Application
    Filed: July 22, 2009
    Publication date: February 4, 2010
    Applicant: Robert Bosch GmbH
    Inventors: Stephan Olbrich, Wolfgang Beuer, Andreas Sommerer, Steffen Meyer-Salfeld
  • Publication number: 20090164102
    Abstract: In a fuel system of an internal combustion engine, the fuel quantity injected into a combustion chamber is a function of an activation period, during which a fuel injection device is activated. A pressure sensor detects the pressure in the fuel rail and provides a signal. The pressure in the fuel rail may be regulated to a setpoint pressure using a setting unit and employing the signal provided by the pressure sensor.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 25, 2009
    Inventors: Stephan OLBRICH, Rainer Peck, Christian Kriechbaum, Michael Schenk, Steffen Meyer-Salfeld, Rene Zieher, Markus Viereck