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. 25, 2014
Filed:
Dec. 17, 2009
Andrew P. Bagnasco, Plymouth, MI (US);
Joshua D. Cowgill, Hartland, MI (US);
Joseph R. Dulzo, Novi, MA;
Raymond Claude Turin, Grosse Pointe Park, MI (US);
Matthew A. Wiles, Royal Oaks, MI (US);
Andrew P. Bagnasco, Plymouth, MI (US);
Joshua D. Cowgill, Hartland, MI (US);
Joseph R. Dulzo, Novi, MA;
Raymond Claude Turin, Grosse Pointe Park, MI (US);
Matthew A. Wiles, Royal Oaks, MI (US);
Abstract
A system for diagnosing a switchable roller finger follower (SRFF) and an oil control valve (OCV) includes a signal monitoring module and a fault detection module. The signal monitoring module receives at least one of an individual cylinder fuel correction (ICFC) signal and an air/fuel ratio imbalance (AFIM) signal when: an engine speed signal is within a predetermined range of speed; an engine load signal is within a predetermined range of load; and a charcoal canister vapor signal is within a predetermined range of flow rate. The fault detection module detects a fault of at least one of a SRFF and an OCV based on an exhaust gas recirculation value and at least one of the ICFC and AFIM signals. The ICFC and AFIM signals are generated based on: an engine position signal; and at least one of an oxygen signal and a wide range air fuel signal.