Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1996-12-17
1997-12-09
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
123 9024, F01L 902
Patent
active
056948930
ABSTRACT:
An outward opening valve system includes an engine having a fluid cavity in fluid communication with an accumulator chamber by a transfer passage, a hollow piston cylinder in fluid communication with a gas passageway via an opening, and an intensifier bore that opens to the hollow piston cylinder. The opening includes an outward valve seat adjacent the gas passageway. An outward valve member with a valve face is moveable between a closed position in which the valve face is against the valve seat closing the opening and an open position in which the valve face is away from the valve seat. A compression spring is utilized to bias the outward valve member toward its open position. An intensifier piston is positioned in the intensifier bore with one end exposed to fluid pressure in the hollow piston cylinder. A coupling linkage interconnects the intensifier piston to the outward valve member. An accumulator plunger is positioned in the accumulator chamber and moveable between a release position and a storage position, but is biased toward its release position by a compression spring. A control valve member is positioned in the transfer passage and has a first position in which the accumulator chamber is open to the fluid cavity and a second position in which the accumulator chamber is closed to the fluid cavity.
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Chan Anthony K.
Feucht Dennis D.
Kaufman Gregory J.
Meister Steven F.
Caterpillar Inc.
Lo Weilun
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