Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2008-05-06
2008-05-06
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090390
Reexamination Certificate
active
07367297
ABSTRACT:
A valve train includes a primary rocker arm50oscillating about a primary oscillating center line L4in response to the rotation of an inlet cam21, a secondary rocker arm60oscillating about a secondary oscillating center line L5so as to transmit a valve drive force via the primary rocker arm50to the inlet valve14and a holder30which supports the primary and secondary rocker arms50, 60in an oscillatory fashion in such a manner that the primary and secondary oscillating center lines L4, L5oscillate together. A cam profile55has a lost motion profile55aa drive profile55bare formed on an abutment portion54of the primary rocker arm50. A sectional shape of the lost motion profile55ais an arc-like shape which is formed about the primary oscillating center line L4.
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Arent & Fox LLP
Denion Thomas
Eshete Zelalem
Honda Motor Co. Ltd.
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