Patents by Inventor Joerg Schuetz

Joerg Schuetz 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 a fuel cell system in a mode of reduced power output
    Patent number: 8192876
    Abstract: The invention relates to a method for operating a fuel cell system in a mode of reduced power output. The fuel cell system comprises a fuel cell stack (BS) having at least one fuel cell (BZ) with an anode (A), a cathode (K), and a proton exchange membrane, anode and cathode inlets, anode and cathode outlets, and a hydrogen and air supply. In order not to adversely affect the life span of the fuel cell system, the air supply to the cathode (K) is interrupted during the changeover to the mode of reduced power output, and an electric voltage (U) of the fuel cell stack (BS) is reduced by means of a current pulse.
    Type: Grant
    Filed: September 22, 2007
    Date of Patent: June 5, 2012
    Assignee: Daimler AG
    Inventors: Volker Schempp, Hans-Frieder Walz, Joerg Schuetz
  • Control Method for a Fuel Cell System and Fuel Cell System
    Publication number: 20110053015
    Abstract: In a method for controlling a fuel cell system that is designed to react a fuel with an oxidant, the fuel cell system can be switched between an idle condition and an active operating condition. In the idle condition, energy is supplied to an energy consumer, at least in part, from an energy storage device, and the fuel is moved actively within the fuel cell system.
    Type: Application
    Filed: March 13, 2009
    Publication date: March 3, 2011
    Inventors: Hans-Frieder Walz, Horst Michels, Patrick Bachinger, Joerg Schuetz, Clemens Boegershausen, Meenakshi Sundaresan, Herbert Schulze
  • METHOD FOR OPERATING A FUEL CELL SYSTEM IN A MODE OF REDUCED POWER OUTPUT
    Publication number: 20100003551
    Abstract: The invention relates to a method for operating a fuel cell system in a mode of reduced power output. The fuel cell system comprises a fuel cell stack (BS) having at least one fuel cell (BZ) with an anode (A), a cathode (K), and a proton exchange membrane, anode and cathode inlets, anode and cathode outlets, and a hydrogen and air supply. In order not to adversely affect the life span of the fuel cell system, the air supply to the cathode (K) is interrupted during the changeover to the mode of reduced power output, and an electric voltage (U) of the fuel cell stack (BS) is reduced by means of a current pulse.
    Type: Application
    Filed: September 22, 2007
    Publication date: January 7, 2010
    Applicant: DAIMLER AG
    Inventors: Volker Schempp, Hans-Frieder Walz, Joerg Schuetz
  • Method and apparatus for controlling a hybrid power supply system in a vehicle
    Patent number: 7487851
    Abstract: A method and an arrangement for controlling the power supply of a vehicle which has a hybrid power system composed of a fuel cell system and a dynamic power system which contains a storage battery. The power system can be operated with optimum dynamics as a function of operating modes which can be set.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: February 10, 2009
    Assignee: Daimler AG
    Inventors: Michael Buck, Joerg Schuetz
  • Method and arrangement for controlling the energy supply of a mobile device comprising at least one electric driving motor and a hybrid energy system containing a fuel cell system and a dynamic energy system
    Publication number: 20060102397
    Abstract: The subject matter of the invention is a method and an arrangement for controlling the power supply of a vehicle which has a hybrid power system composed of a fuel cell system (7) and a dynamic power system (53) which contains a storage battery (10). The power system can be operated with optimum dynamics as a function of operating modes which can be set (FIG. 1).
    Type: Application
    Filed: July 2, 2003
    Publication date: May 18, 2006
    Applicant: DaimlerChrysler AG
    Inventors: Michael Buck, Joerg Schuetz