Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2005-11-22
2005-11-22
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
06966288
ABSTRACT:
A variable camshaft timing system for an internal combustion engine comprising a housing having an outer circumference for accepting drive force, a rotor for connection to a camshaft coaxially located within the housing capable of rotation to shift the relative angular position of the housing and the rotor, a locking pin, and a centrifugal valve. The locking pin is slidably located and radially moveable in a radial bore from a locked position in which the inner end fits into the recess defined by the housing, locking the relative angular position of the rotor and housing, to an unlocked position in which the inner end does not engage the receiving hole defined by the housing. The centrifugal valve is in fluid communication with an inlet line coupled directly to an engine oil supply controlling flow of oil to the locking pin.
REFERENCES:
patent: 4421074 (1983-12-01), Garcea et al.
patent: 6761138 (2004-07-01), Takahashi et al.
patent: 1221540 (2002-07-01), None
patent: 1355046 (2003-12-01), None
patent: 06307209 (1994-11-01), None
patent: 09100704 (1997-04-01), None
patent: 2001227311 (2001-08-01), None
Borg-Warner Inc.
Brown & Michaels PC
Denion Thomas
Dziegielewski Greg
Eshete Zelalem
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