Patents by Inventor Michael S. Sweppy

Michael S. Sweppy 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).

  • Diagnostic airflow measurement
    Patent number: 5384707
    Abstract: A diagnostic method for an internal combustion engine determines airflow using three independent airflow determinations. The three airflow determinations are compared to each other and an error is established if one airflow determination differs significantly from at least one other airflow determination.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: January 24, 1995
    Assignee: Ford Motor Company
    Inventors: James M. Kerns, Michael J. Cullen, Michael S. Sweppy
  • Onboard detection of oxygen sensor switch rate for determining air/fuel ratio control system failure
    Patent number: 5335539
    Abstract: Fault detection in a feedback air/fuel ratio control system using an exhaust gas oxygen sensor compares the expected transport delay time to the time between exhaust gas oxygen sensor output level switching. A fuel system failure is determined when there is an inappropriate switching rate of the oxygen sensor output level.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: August 9, 1994
    Assignee: Ford Motor Company
    Inventors: Michael S. Sweppy, James M. Kerns
  • Onboard diagnostic system of vehicle ignition system
    Patent number: 4899579
    Abstract: A method of operating an onboard diagnostic system for a distributorless ignition system of an internal combustion engine includes detecting the time of occurrence of a spark plug firing and calculating the time of spark plug firing. The calculated time and the detected time are compared to see if they come within a predetermined time period, adjusted for averaged rotational velocity. A fault is indicated if the time of occurrence of the calculated and the detected spark do not come within the predetermined time period.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: February 13, 1990
    Assignee: Ford Motor Company
    Inventors: Michael S. Sweppy, Richard R. Tuttle, Everett P. Schumaker