Arrangement for actuating gas-change valves

Details Arrangement for actuating gas-change valves Arrangement for actuating gas-change valves

1979-09-11

1981-07-14

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Fluid link or column actuator

123 9012, 123 9016, F16K 31122, F01L 104

Patent

active

042782333

ABSTRACT:
A hydraulic system for actuating gas-change valves in internal combustion engines or compressors wherein the output piston associated with each gas-change valve is capable of being moved against the force of a closing spring through a control circuit filled with control fluid by an input piston operable by a cam, with means for venting the control fluid at the highest point of the hydraulic system, and wherein the input cylinder communicates with a system for refilling with control fluid. The means for venting the control fluid are formed as permanent venting means, a variable area restrictor determining the amount of control fluid in the hydraulic system during operation is provided which is located in a discharge circuit, and the cam actuating the output piston is formed with a pre-ramp and a post-ramp.

REFERENCES:
patent: 1690032 (1928-10-01), Noble et al.
patent: 2126885 (1938-08-01), Heintz
patent: 2329662 (1943-09-01), Steiner
patent: 2602434 (1952-07-01), Barnaby
patent: 3119592 (1964-01-01), Fraschelti
patent: 3257999 (1966-06-01), Fiedler
patent: 3306270 (1967-02-01), McCarl
patent: 4106446 (1978-08-01), Yamada et al.

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