Patents by Inventor Denise M Kramer

Denise M Kramer 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 controlling an operating condition of a vehicle engine
    Patent number: 7292928
    Abstract: A residual ratio factor characterizing the amount of residual exhaust gas left in a selected cylinder at the end of a piston intake stroke is determined from tabular and surface models based on previously gathered dynamometer data from a test vehicle at various engine speeds. The residual ratio factor is then used to calculate the mole fractions of air and residual exhaust gas in the selected cylinder, which, in turn, are used to determine mass airflow at an engine intake port at the end of the intake stroke. The mass airflow can then be used to derive further models for determining an engine operating parameter, such as fuel/air ratio, required for achieving at preselected vehicle operating condition.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: November 6, 2007
    Assignee: Chrysler LLC
    Inventors: Roger K Vick, Michael J Prucka, Timothy A Coatesworth, Denise M Kramer, Eugenio DiValentin, Gregory L Ohl
  • Method for controlling an operating condition of a vehicle engine
    Patent number: 7181332
    Abstract: A residual ratio factor characterizing the amount of residual exhaust gas left in a selected cylinder at the end of a piston intake stroke is determined from tabular and surface models based on previously gathered dynamometer data from a test vehicle at various engine speeds. The residual ratio factor is then used to calculate the mole fractions of air and residual exhaust gas in the selected cylinder, which, in turn, are used to determine mass airflow at an engine intake port at the end of the intake stroke. The mass airflow can then be used to derive further models for determining an engine operating parameter, such as fuel/air ratio, required for achieving at preselected vehicle operating condition.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: February 20, 2007
    Assignee: DaimlerChrysler Corporation
    Inventors: Roger K Vick, Michael J Prucka, Timothy A Coatesworth, Denise M Kramer, Eugenio DiValentin, Gregory L Ohl