Patents by Inventor DETLEV SCHÄFER

DETLEV SCHÄFER 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).

  • Electrical system and method for a hybrid-electric vehicle
    Patent number: 9118210
    Abstract: An electrical system includes a battery for providing electrical power to a starter mechanism and an auxiliary load of a hybrid-electric vehicle. An electric double-layer capacitor (“EDLC”) is electrically connectable to the battery and the auxiliary load. A separation switch is electrically connected between the battery and the EDLC for electrically separating the battery from the EDLC and the auxiliary load. The separation switch is opened in response to the voltage across the battery being less than the voltage across the EDLC.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: August 25, 2015
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Chandra S. Namuduri, Michael G. Reynolds, Kenneth J. Shoemaker, Theo L. Moreno, James F. Crawford, Detlev Schäfer, Danny Y. Mui
  • Supplying circuit for the electrical supply of a vehicle
    Patent number: 8760001
    Abstract: A supply circuit is provided for the electrical supply of a vehicle. Here, a battery for generating a battery supply voltage and a step-up converter for generating an intermediate voltage from the battery supply voltage are provided. A temporary store is supplied from the intermediate voltage and serves for storing electrical energy. A step-down converter for generating a first consumer voltage for supplying a first consumer from the intermediate voltage and a second step-down converter for generating a second consumer voltage for supplying a second consumer from the intermediate voltage are provided. A control circuit serves to control the step-up converter, the first step-down converter and the second step-down converter.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: June 24, 2014
    Assignee: GM Global Technology Operations LLC
    Inventor: Detlev Schaefer
  • ELECTRICAL SYSTEM AND METHOD FOR A HYBRID-ELECTRIC VEHICLE
    Publication number: 20140103722
    Abstract: An electrical system includes a battery for providing electrical power to a starter mechanism and an auxiliary load of a hybrid-electric vehicle. An electric double-layer capacitor (“EDLC”) is electrically connectable to the battery and the auxiliary load. A separation switch is electrically connected between the battery and the EDLC for electrically separating the battery from the EDLC and the auxiliary load. The separation switch is opened in response to the voltage across the battery being less than the voltage across the EDLC.
    Type: Application
    Filed: October 15, 2012
    Publication date: April 17, 2014
    Applicant: GM Global Technology Operations LLC
    Inventors: CHANDRA S. NAMUDURI, MICHAEL G. REYNOLDS, KENNETH J. SHOEMAKER, THEO L. MORENO, JAMES F. CRAWFORD, DETLEV SCHÄFER, DANNY Y. MUI
  • SUPPLYING CIRCUIT FOR THE ELECTRICAL SUPPLY OF A VEHICLE
    Publication number: 20110241421
    Abstract: A supply circuit is provided for the electrical supply of a vehicle. Here, a battery for generating a battery supply voltage and a step-up converter for generating an intermediate voltage from the battery supply voltage are provided. A temporary store is supplied from the intermediate voltage and serves for storing electrical energy. A step-down converter for generating a first consumer voltage for supplying a first consumer from the intermediate voltage and a second step-down converter for generating a second consumer voltage for supplying a second consumer from the intermediate voltage are provided. A control circuit serves to control the step-up converter, the first step-down converter and the second step-down converter.
    Type: Application
    Filed: March 28, 2011
    Publication date: October 6, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Detlev SCHAEFER