Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1991-07-16
1993-03-16
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
123 9014, 123 9015, F01L 902, F01L 134
Patent
active
051934957
ABSTRACT:
The present invention is a valve control device (10) for an internal combustion engine (12). It comprises a housing (18) having a piston chamber (20), in which is mounted a power piston (22) for reciprocating movement. The power piston (22) is connected to the engine valve (26). An air reservoir chamber (62) connected to a high pressure air source (74), is formed above the piston chamber (20). A poppet valve (42) mounted on the upper surface of the power piston (22) blocks communication between the piston chamber (20) and the air reservoir chamber (62) when the power piston (22) is in its highest position. The air source (74) is also connectred to the upper portion of the piston chamber (20) through a timing valve (76), which controls flow of air to the piston chamber (20).
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Cross E. Rollins
Lo Weilun
Southwest Research Institute
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