Valve assembly for internal combustion engine

Details Valve assembly for internal combustion engine Valve assembly for internal combustion engine

F - Mech Eng,Light,Heat,Weapons

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F01L 9/02 (2006.01) F01L 1/16 (2006.01) F02B 1/04 (2006.01)

Patent

CA 1274131

ABSTRACT An especially adapted engine valve (28) includes structure which damps motion of the valve (28) during its final closure to seat. A spool portion (38) of the valve (28) establishes with its associated guideway (42), a damping chamber (40) into which oil under pressure may be admitted via a feed passageway (47). Oil is discharged through a flow-restricted bleed passageway (48) during closure of the valve (28) so as to create beneficial pressure buildup within the damping chamber (40) and thus reduce the valve's closing velocity. Since the damping functions occur passively (i.e. dependent only upon the relative location of the valve within its guideway), gentle closing of the valve (28) can occur at any point on the cam (12) lobe thereby making it especially well suited for use in "lost motion" valve control systems.

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