Diagnostic methods and systems for active fuel management...

Details Diagnostic methods and systems for active fuel management... Diagnostic methods and systems for active fuel management...

2007-01-31

2008-10-28

McCall, Eric S (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Testing of an individual engine part

Reexamination Certificate

active

07441451

ABSTRACT:
A diagnostic system for an active fuel management (AFM) solenoid of an internal combustion engine is provided. The system includes: a command module that selectively commands a solenoid signal to energize and de-energize the AFM solenoid, a timer module that activates a timer based on a status of the solenoid signal, and a fault module that selectively diagnoses a fault of the AFM solenoid based on the timer and a knock sensor signal.

REFERENCES:
patent: 7082918 (2006-08-01), Rozario et al.
patent: 7086374 (2006-08-01), McDonald et al.
patent: 7302921 (2007-12-01), McDonald et al.
patent: 7357019 (2008-04-01), Mc Donald et al.
patent: 2003/0106519 (2003-06-01), Patel et al.
patent: 2005/0257768 (2005-11-01), McDonald et al.
patent: 2007/0119406 (2007-05-01), Mc Donald et al.
patent: 2008/0093172 (2008-04-01), Albertson et al.
U.S. Appl. No. 11/290,005, filed Nov. 30, 2005.

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