Patents by Inventor Bernd Kircher

Bernd Kircher 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).

  • Internal exhaust recirculation method for an internal combustion engine
    Patent number: 7249597
    Abstract: The invention relates to the internal exhaust-gas recirculation in an internal combustion engine with gas exchange valves periodically controlled by a camshaft (22) in accordance with the four-stroke principle, in which, during the gas exchange exhausting of exhaust gas from the respective cylinder (1) into the exhaust duct (5), an intake valve (2) associated with the respective cylinder (1) is open in a crank angle range after top dead center of the ignition of the gas mixture present in the cylinder (1), in order to exhaust part of the exhaust gas into an intake duct (3), so that during the next gas exchange intake both fresh gas and exhaust gas are taken in from the intake duct (3), the respective intake valve (2) being actuated during the gas exchange exhausting independently of the periodic gas exchange intake, and the additional opening of the respective intake valve (2) being carried out in the range from 110 to 150% of the opening angle of the start of opening of the exhaust duct (5) by the exhaust va
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: July 31, 2007
    Assignee: FEV Motorentechnik, GmbH
    Inventors: Jochen Müller, Bernd Kircher, Markus Duesmann, Enno Lohse
  • Internal exhaust recirculation method for an internal combustion engine
    Publication number: 20060102157
    Abstract: The invention relates to the internal exhaust-gas recirculation in an internal combustion engine with gas exchange valves periodically controlled by a camshaft (22) in accordance with the four-stroke principle, in which, during the gas exchange exhausting of exhaust gas from the respective cylinder (1) into the exhaust duct (5), an intake valve (2) associated with the respective cylinder (1) is open in a crank angle range after top dead center of the ignition of the gas mixture present in the cylinder (1), in order to exhaust part of the exhaust gas into an intake duct (3), so that during the next gas exchange intake both fresh gas and exhaust gas are taken in from the intake duct (3), the respective intake valve (2) being actuated during the gas exchange exhausting independently of the periodic gas exchange intake, and the additional opening of the respective intake valve (2) being carried out in the range from 110 to 150% of the opening angle of the start of opening of the exhaust duct (5) by the exhaust va
    Type: Application
    Filed: April 14, 2004
    Publication date: May 18, 2006
    Applicant: REV Motorentechnik GmbH
    Inventors: Jochen Müller, Bernd Kircher, Markus Duesmann, Enno Lohse