The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 19, 1996
Filed:
Mar. 03, 1994
John M Glidewell, Dearborn, MI (US);
Granger K Chui, Dearborn Heights, MI (US);
Woong-Chul Yang, Ann Arbor, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
The present invention is directed to an on-board diagnostic system for detecting a malfunctioning fuel pump in an internal combustion engine during engine operation. Pressure sensor means are provided for sensing fuel pressure in the fuel supply line and for generating corresponding pressure signals. Signal processing means receive and process the pressure signals from the pressure sensor means. An output signal is generated by the signal processing means if pressure signals are determined to correspond to a defective fuel pump Such output signal can be stored, used to alert an engine operator to an impaired fuel pump and/or provided to a fuel injector control means for adjusting fuel flow.