Roller finger follower assembly for valve deactivation

Details Roller finger follower assembly for valve deactivation Roller finger follower assembly for valve deactivation

2006-08-22

2006-08-22

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090390, C074S569000

Reexamination Certificate

active

07093572

ABSTRACT:
A roller finger follower rocker arm assembly for deactivating an engine valve. A follower body pivots on a hydraulic lash adjuster, and engages a valve stem or lifter. The body receives a reciprocating member having a first and second rollers outboard of the body for following eccentrics of a cam lobe that straddles the body, the body having elongate openings on either side of the reciprocating member. A locking pin selectively locks and unlocks the body to the reciprocating member. The reciprocating member does not make contact with the cam lobe and functions only as a link between the latching mechanism and the rollers. The pin engages the reciprocating member by a latching spring and is disengaged by pressurized oil supplied through the hydraulic lash adjuster. Means is provided for limiting axial growth of the HLA during deactivation mode of the rocker arm assembly.

REFERENCES:
patent: 5544626 (1996-08-01), Diggs et al.
patent: 5619958 (1997-04-01), Hampton et al.
patent: 6314928 (2001-11-01), Baraszu et al.
patent: 6532920 (2003-03-01), Sweetnam et al.
patent: 6755167 (2004-06-01), Krieg et al.
patent: 6925978 (2005-08-01), Gerzseny et al.

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