Patents by Inventor Thomas J. Majcher

Thomas J. Majcher 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).

  • System and method for diagnosing a fault in an oxygen sensor based on engine speed
    Patent number: 9146177
    Abstract: A system according to the principles of the present disclosure includes an error count module and a sensor diagnostic module. The error count module increases an error count when an actual air/fuel ratio is different from a desired air/fuel ratio and selectively adjusts the error count based on an actual engine speed. An oxygen sensor generates a signal indicating the actual air/fuel ratio. The sensor diagnostic module diagnoses a fault in the oxygen sensor when the error count is greater than a first predetermined count.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: September 29, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Stephen Paul Levijoki, Thomas J. Majcher, Scott Jeffrey, John W. Siekkinen
  • System and method for diagnosing faults in an oxygen sensor
    Patent number: 8939010
    Abstract: A system according to the principles of the present disclosure includes an error period module and a sensor diagnostic module. The error period module determines an error period based on an amount of time that a first air/fuel ratio and a desired air/fuel ratio are different. A first oxygen sensor generates a first signal indicating the first air/fuel ratio. The sensor diagnostic module diagnoses a fault in the first oxygen sensor when the error period is greater than a predetermined period.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: January 27, 2015
    Inventors: Stephen Paul Levijoki, Thomas J. Majcher, John W. Siekkinen, Michael John Dokter, Scott Jeffrey
  • SYSTEM AND METHOD FOR DIAGNOSING A FAULT IN AN OXYGEN SENSOR BASED ON ENGINE SPEED
    Publication number: 20140033812
    Abstract: A system according to the principles of the present disclosure includes an error count module and a sensor diagnostic module. The error count module increases an error count when an actual air/fuel ratio is different from a desired air/fuel ratio and selectively adjusts the error count based on an actual engine speed. An oxygen sensor generates a signal indicating the actual air/fuel ratio. The sensor diagnostic module diagnoses a fault in the oxygen sensor when the error count is greater than a first predetermined count.
    Type: Application
    Filed: November 8, 2012
    Publication date: February 6, 2014
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Stephen Paul Levijoki, Thomas J. Majcher, Scott Jeffrey, John W. Siekkinen
  • SYSTEM AND METHOD FOR DIAGNOSING FAULTS IN AN OXYGEN SENSOR
    Publication number: 20130104626
    Abstract: A system according to the principles of the present disclosure includes an error period module and a sensor diagnostic module. The error period module determines an error period based on an amount of time that a first air/fuel ratio and a desired air/fuel ratio are different. A first oxygen sensor generates a first signal indicating the first air/fuel ratio. The sensor diagnostic module diagnoses a fault in the first oxygen sensor when the error period is greater than a predetermined period.
    Type: Application
    Filed: November 1, 2011
    Publication date: May 2, 2013
    Applicant: GM Global Technology Operations LLC
    Inventors: Stephen Paul Levijoki, Thomas J. Majcher, John W. Siekkinen, Michael John Dokter, Scott Jeffrey
  • Individual cylinder fuel control systems and methods for oxygen sensor degradation
    Patent number: 8261727
    Abstract: A system includes an offset determination module and a correction determination module. The offset determination module determines an offset value based on an average response time of an exhaust gas oxygen (EGO) sensor located upstream of a catalyst in an exhaust system. The offset value relates one of a predetermined number of cylinder imbalance values to a cylinder of an engine. The correction determination module determines a fueling correction for the cylinder based on the offset value and one of the predetermined number of cylinder imbalance values.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: September 11, 2012
    Inventors: Andrew P. Bagnasco, Thomas J. Majcher
  • INDIVIDUAL CYLINDER FUEL CONTROL SYSTEMS AND METHODS FOR OXYGEN SENSOR DEGREDATION
    Publication number: 20120080016
    Abstract: A system includes an offset determination module and a correction determination module. The offset determination module determines an offset value based on an average response time of an exhaust gas oxygen (EGO) sensor located upstream of a catalyst in an exhaust system. The offset value relates one of a predetermined number of cylinder imbalance values to a cylinder of an engine. The correction determination module determines a fueling correction for the cylinder based on the offset value and one of the predetermined number of cylinder imbalance values.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 5, 2012
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Andrew P. BAGNASCO, Thomas J. MAJCHER