Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Reexamination Certificate
2008-07-01
2008-07-01
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
C123S090150, C123S090160
Reexamination Certificate
active
11123063
ABSTRACT:
Systems and methods for actuating engine valves are disclosed. The systems may include primary and auxiliary rocker arms disposed adjacent to each other on a rocker arm shaft. The primary rocker arm may actuate an engine valve for primary valve actuation motions, such as main exhaust events, in response to an input from a first valve train element, such as a cam. The auxiliary rocker arm may receive one or more auxiliary valve actuation motions, such as for engine braking, exhaust gas recirculation, and/or brake gas recirculation events, from a second valve train element. A hydraulic actuator piston may be disposed between the auxiliary rocker arm and the primary rocker arm. The actuator piston may be selectively locked into an extended position between the primary and auxiliary rocker arms so as to selectively transfer the one or more auxiliary valve actuation motions from the auxiliary rocker arm to the primary rocker arm.
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Janak Robb
Meistrick Zdenek S.
Eshete Zelalem
Jacobs Vehicle Systems, Inc.
Kelley Drye & Warren LLP
Yohannan, Esq. David R.
LandOfFree
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