Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2006-12-15
2009-12-22
Cuff, Michael (Department: 3741)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090110, C123S090120, C073S149000
Reexamination Certificate
active
07634981
ABSTRACT:
A method for operating a multi-cylinder internal combustion engine includes controlling opening of intake or exhaust valves, via a step of generating a control current in a control circuit for an electrical actuator coupled with the valve. The control circuit is then monitored for an induced current that differs from the control current, and a signal outputted that is indicative of valve performance responsive to monitoring the control circuit. Another operating method includes determining engine valve performance and also trimming an engine valve based on one signal which is indicative of valve performance. An internal combustion engine includes an electrical actuator configured to control opening or closing of one of an intake valve and an exhaust valve. An electronic control module is configured via a software fault detection routine to determine a performance condition of an intake or exhaust valve in the engine via monitoring a control circuit for induced currents when an electrical actuator coupled with the intake or exhaust valve is de-energized.
REFERENCES:
patent: 4875451 (1989-10-01), Evasick et al.
patent: 4941348 (1990-07-01), Hock
patent: 5107701 (1992-04-01), Smith
patent: 5456223 (1995-10-01), Miller et al.
patent: 5634448 (1997-06-01), Shinogle et al.
patent: 5746175 (1998-05-01), Hu
patent: 5839420 (1998-11-01), Thomas
patent: 5889405 (1999-03-01), Yanai et al.
patent: 6216668 (2001-04-01), Haugen
patent: 6354266 (2002-03-01), Cornell et al.
patent: 6363314 (2002-03-01), Hafner et al.
patent: 6651619 (2003-11-01), Ogiso
patent: 6668773 (2003-12-01), Holtman et al.
patent: 6748928 (2004-06-01), Shingole
patent: 6769392 (2004-08-01), Lawrence et al.
patent: 6892569 (2005-05-01), Martin et al.
patent: 6986646 (2006-01-01), Bettenhausen et al.
patent: 2003/0041843 (2003-03-01), Shinogle
patent: 2003/0213449 (2003-11-01), Bloms et al.
patent: 2005/0126524 (2005-06-01), Funke et al.
patent: 2006/0096560 (2006-05-01), Afjeh et al.
patent: 103 24 806 (2004-12-01), None
patent: 1340888 (2003-09-01), None
patent: 03-182607 (1991-08-01), None
Dea Kevin
Puckett Daniel R.
Caterpillar Inc.
Cuff Michael
Leung Ka Chun
Liell & McNeil
LandOfFree
Valve performing detection and modification strategy for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Valve performing detection and modification strategy for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve performing detection and modification strategy for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4147737