Variable displacement engine diagnostics

Details Variable displacement engine diagnostics Variable displacement engine diagnostics

2011-04-12

2011-04-12

Kirkland, III, Freddie (Department: 2855)

Measuring and testing

Internal combustion engine or related engine system or...

Testing of an individual engine part

C073S114370

Reexamination Certificate

active

07921709

ABSTRACT:
Methods and systems are provided for monitoring cylinder valve deactivation of a cylinder valve of an engine. One example method comprises, indicating degradation of cylinder valve deactivation in response to manifold pressure at or around a characteristic frequency.

REFERENCES:
patent: 4549514 (1985-10-01), Abe et al.
patent: 4999781 (1991-03-01), Holl et al.
patent: 5557971 (1996-09-01), Uemura et al.
patent: 5721375 (1998-02-01), Bidner
patent: 6243641 (2001-06-01), Andrews et al.
patent: 6382175 (2002-05-01), van der Staay et al.
patent: 6457353 (2002-10-01), Kanke et al.
patent: 6741924 (2004-05-01), Iwasaki et al.
patent: 6945227 (2005-09-01), Russell et al.
patent: 7017551 (2006-03-01), Shimizu
patent: 7063057 (2006-06-01), Waters et al.
patent: 7171929 (2007-02-01), Dosdall et al.
patent: 7204132 (2007-04-01), Reed et al.
patent: 7444236 (2008-10-01), Wiles
patent: 7469672 (2008-12-01), Andri
patent: 7546827 (2009-06-01), Wade et al.
patent: 7559309 (2009-07-01), Winstead
patent: 2003/0191567 (2003-10-01), Gentilcore
patent: 2005/0205048 (2005-09-01), Winstead
patent: 2006/0243030 (2006-11-01), Oe et al.
patent: 2008/0092836 (2008-04-01), Mutti et al.
patent: 403279626 (1991-12-01), None
Doering, Jeffrey Allen, et al., “Variable Displacement Engine Diagnostics”, U.S. Appl. No. 12/352,989, filed Jan. 13, 2009, 35 pgs.

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