Patents by Inventor René Wackerow

René Wackerow 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 and electronic control unit for diagnosing a catalytic converter
    Patent number: 7131261
    Abstract: A method for diagnosing a catalytic converter (7), which is arranged in an exhaust-gas system (6) of an internal combustion engine (1) has the steps of: detecting the signal (USHK) of an exhaust-gas probe (9) downstream of the catalytic converter; forming a limit value model amplitude (AHKF) from at least one quantity (ML, n) which occurs upstream of the catalytic converter (7); forming a catalytic converter evaluation quantity (DKATI) whose value increases with increasing deviation of the amplitude (AHK) of the signal (USHK) from the limit value model amplitude (AHKF); evaluating the operability of the catalytic converter (7) on the basis of the catalytic converter evaluation quantity (DKATI); stopping the evaluation when an oxygen-dependent catalytic converter load (KATIN) exceeds or drops below a threshold value. The method is characterized in that the threshold value is pregiven in dependence upon the signal (USHK) of the exhaust-gas probe (9) rearward of the catalytic converter.
    Type: Grant
    Filed: December 7, 2002
    Date of Patent: November 7, 2006
    Assignee: Robert Bosch GmbH
    Inventors: René Wackerow, Erich Schneider
  • Method and electronic control unit for diagnosing a catalytic converter
    Publication number: 20040134185
    Abstract: A method for diagnosing a catalytic converter (7), which is arranged in an exhaust-gas system (6) of an internal combustion engine (1) has the steps of: detecting the signal (USHK) of an exhaust-gas probe (9) downstream of the catalytic converter; forming a limit value model amplitude (AHKF) from at least one quantity (ML, n) which occurs upstream of the catalytic converter (7); forming a catalytic converter evaluation quantity (DKATI) whose value increases with increasing deviation of the amplitude (AHK) of the signal (USHK) from the limit value model amplitude (AHKF); evaluating the operability of the catalytic converter (7) on the basis of the catalytic converter evaluation quantity (DKATI); stopping the evaluation when an oxygen-dependent catalytic converter load (KATIN) exceeds or drops below a threshold value. The method is characterized in that the threshold value is pregiven in dependence upon the signal (USHK) of the exhaust-gas probe (9) rearward of the catalytic converter.
    Type: Application
    Filed: December 23, 2003
    Publication date: July 15, 2004
    Inventors: Rene Wackerow, Erich Schneider