Patents by Inventor Harald Liederer

Harald Liederer 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 determining a mass airflow
    Patent number: 6999882
    Abstract: In a method for determining a mass airflow in an air duct using a mass airflow sensor, sensor signals at successive times, indicating the magnitude of the mass airflow, are captured and, using a characteristic curve for the mass airflow sensor, corresponding values are determined for the mass airflow. In doing so, a time series of signals is subjected to a vibration analysis, which determines a fundamental vibration and at least one prescribed harmonic vibration of the fundamental vibration, and the existence of a backflow is established if the ratio of the strength of the harmonic vibration to the strength of the fundamental vibration exceeds a prescribed threshold value.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: February 14, 2006
    Assignee: Siemens Aktiengellschaft
    Inventors: Werner Frie, Christoph Haberer, Harald Liederer
  • Method for determining a mass airflow
    Publication number: 20040204871
    Abstract: In a method for determining a mass airflow in an air duct using a mass airflow sensor, sensor signals at successive times, indicating the magnitude of the mass airflow, are captured and, using a characteristic curve for the mass airflow sensor, corresponding values are determined for the mass airflow. In doing so, a time series of signals is subjected to a vibration analysis, which determines a fundamental vibration and at least one prescribed harmonic vibration of the fundamental vibration, and the existence of a backflow is established if the ratio of the strength of the harmonic vibration to the strength of the fundamental vibration exceeds a prescribed threshold value.
    Type: Application
    Filed: July 28, 2003
    Publication date: October 14, 2004
    Applicant: Siemens Aktiengesellschaft
    Inventors: Werner Frie, Christoph Haberer, Harald Liederer