Internal-combustion engines – Poppet valve operating mechanism – Valve driven closed
Patent
1990-09-06
1991-05-21
Okonsky, David A.
Internal-combustion engines
Poppet valve operating mechanism
Valve driven closed
123 9016, 123 9039, 251232, 74519, 74559, F01L 130
Patent
active
050165810
ABSTRACT:
A valve stem which is located for axial movement; a valve lever is pivotally mounted at one end and is attached adjacent the other end to the end of the valve stem, the valve lever defines a track; a drive pin engages in the track the drive pin being mounted at one end of a first link the other end of the link being pivotally mounted about a fixed pivot, a second link is pivotally mounted at one end about moveable pivot, the first and second links being interconnected by an intermediate link pivotally attached to said first and second links at positions separated from their pivots, a drive link is pivotally connected at one end to the pivotal connection between the second link and intermediate link and at the other end to a crank, so that rotation of the crank will cause the linkage to oscillate and the drive pin to perform a reciprocating motion along an arcuate path; the trank has a first portion which is engaged by the drive pin when the valve is closed and coincides with the arcuate path of the drive pin and a second portion which diverges from the path of the drive pin, so that engagement of the second portion by the drive pin will cause the valve lever to move opening and closing the valve; and means being provided for movement of the pivot to vary the timing and duration of opening of the valve.
REFERENCES:
patent: 1503384 (1924-07-01), Sewell
patent: 1586188 (1926-05-01), Fisher
patent: 2035166 (1936-03-01), Kimball
patent: 2035222 (1936-03-01), Curtis
patent: 2954017 (1960-09-01), Forstner
patent: 3952995 (1976-04-01), Nagumo et al.
patent: 4457268 (1984-07-01), Jones
patent: 4570900 (1986-02-01), Lonardi et al.
Jaguar Cars Limited
Lo Weilun
Okonsky David A.
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