Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-10-09
2007-10-09
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090200, C123S090390, C123S090440, C074S56800M, C074S569000
Reexamination Certificate
active
11240710
ABSTRACT:
A two-step roller finger follower having a movable high-lift portion and a low-lift portion. A lock pin mechanism in the low-lift portion includes a lock pin that may be driven hydraulically into latched engagement with the high-lift portion. The lock pin assembly comprises a lock pin and a separable switching pin. A blocking clip mountable on the associated hydraulic lash adjuster includes first and second ends that extend into a switching pin locking groove to block axial motion thereof. A ramp on the follower body mates with a ramp on the blocking clip such that oscillatory motion of the follower engages and disengages the blocking pin from the locking groove. The clip unblocks the switching pin at only those times in the camshaft rotational cycle when complete locking and unlocking is assured, and ending well before the beginning of the next valve lift event.
REFERENCES:
patent: 5203289 (1993-04-01), Hara
patent: 6112711 (2000-09-01), Shimizu et al.
patent: 6463897 (2002-10-01), Fernandez et al.
patent: 6591798 (2003-07-01), Hendriksma et al.
patent: 6925978 (2005-08-01), Gerseny
patent: 6966291 (2005-11-01), Fischer
patent: 196 52 180 (1998-06-01), None
patent: 196 52 675 (1998-06-01), None
patent: 198 01 604 (1999-07-01), None
patent: 1 277 924 (2003-01-01), None
patent: 1 568 859 (2005-08-01), None
European Patent Office Search Report dated Dec. 2, 2007 with cited documents for European Application No. 06076683.9-2311.
Fernandez Hermes A.
Lipinski Andrew J.
Delphi Technologies Inc.
Denion Thomas
Marshall Paul L.
Riddle Kyle M.
LandOfFree
Timing mechanism for a switchable two-step roller finger... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Timing mechanism for a switchable two-step roller finger..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Timing mechanism for a switchable two-step roller finger... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3862460