Patents by Inventor Friedrich Hase

Friedrich Hase 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).

  • Process for heating the intake air in internal-combustion engines by means of a flame starting system
    Patent number: 5372102
    Abstract: The invention relates to a process and apparatus for heating the intake air in internal-combustion engines by means of a flame starting system with at least one glow plug. The apparatus is controlled in such a manner that the glow plug is continuously preheated during a first time period and is operated in pulses in a following second time period and the glow plug is switched off after a safety time has elapsed. The glow plug is preheated after it has been switched off, taking into account the instantaneous glow plug temperature during the cooling and the voltage available in such a manner that the temperature required for a repeat start is reached within a narrow tolerance band.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: December 13, 1994
    Assignee: Mercedes-Benz AG
    Inventors: Friedrich Schmid, Andreas Koppitz, Friedrich Hase, Peter Joppig, Roland Klak
  • Process for heating the intake air internal combustion engines by means of a flame starting system
    Patent number: 5138987
    Abstract: A process and device for heating the intake air in internal-combustion engines by means of a flame starting system is disclosed which contains at least one heater plug and has a control unit which supplies the heater plug with voltage for a specific preheating time.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: August 18, 1992
    Assignee: Mercedes-Benz AG
    Inventors: Friedrich Schmid, Friedrich Hase, Peter Joppig, Roland Klak