Patents by Inventor Steven W. Majors

Steven W. Majors 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).

  • Methods, systems, and apparatuses of purge content estimation logic for improved fuel control
    Patent number: 11815875
    Abstract: In various embodiments, methods, systems, and vehicle apparatuses are provided.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: November 14, 2023
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS, LLC
    Inventors: Jianyang Geng, Scott R. Jeffrey, Steven W. Majors, Jin Shen
  • METHODS, SYSTEMS, AND APPARATUSES OF PURGE CONTENT ESTIMATION LOGIC FOR IMPROVED FUEL CONTROL
    Publication number: 20220100167
    Abstract: In various embodiments, methods, systems, and vehicle apparatuses are provided.
    Type: Application
    Filed: September 30, 2020
    Publication date: March 31, 2022
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Jianyang Geng, Scott R. Jeffrey, Steven W. Majors, Jin Shen
  • EGR fault diagnostic system
    Patent number: 6085732
    Abstract: A system and method for diagnosing EGR system and EGR cooler faults evaluates a temperature signal generated by a sensor at the EGR cooler, such as a coolant or gas temperature sensor. An engine control module includes an on-board EGR diagnosis unit and DSP that reads the EGR cooler temperature signals over a predetermined time period or sample points, and generates a symmetric signal. A discrete fast Fourier transform is applied to the symmetric signal to develop values for the spectral magnitude and phase angle of a primary frequency component of the signal. These values can be compared to respective predetermined threshold values to determine whether a fault condition has occurred in the EGR system or EGR cooler. In an alternative embodiment, the DSP operates in the time domain to determine a signal power value for the change in cooler temperature signal over a predetermined time period.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: July 11, 2000
    Inventors: Yue Yun Wang, Steven W. Majors