Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1978-01-27
1980-02-19
Myhre, Charles J.
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
123 9013, 123 9015, 123 9039, 123 9041, 123 9043, F01L 902
Patent
active
041889258
ABSTRACT:
An engine valve operating mechanism for operating the poppet valves controlling the intake and exhaust ports of each cylinder independently of each other and independently of the crank shaft speed. The mechanism includes an extendable and retractable fluid actuator having first and second members telescopically engaged with each other, one of which members is rotatable with respect to the other. An expansible and contractable fluid chamber is defined between the members, and the flow of fluid into and out of the chamber is controlled in accordance with the angular position of the members with respect to each other. When fluid flows into the chamber, the chamber expands causing the actuator to extend. When fluid is exhausted from the chamber, the actuator contracts. The actuator is mounted on a support member and engages a poppet valve operator to cause a poppet valve engaged by the operator to move in opening and closing directions in response to extension and retraction of the actuator. The valve operating mechanisms can be mounted on cylinder heads of an engine, and an engine incorporating the invention includes a hydraulic system for maintaining a supply of hydraulic fluid to the valve operating mechanisms to permit the valve operating mechanisms to be operated independently of each other to vary the valve events or valve operations at each cylinder in accordance with performance requirements.
REFERENCES:
patent: 1491023 (1924-04-01), Belden
patent: 2133569 (1938-10-01), Price
patent: 2763249 (1956-09-01), Flynn
patent: 3738337 (1973-06-01), Massie
patent: 3872844 (1975-03-01), Gates
patent: 3964455 (1976-06-01), Brown
patent: 4009695 (1977-03-01), Ule
patent: 4114588 (1978-09-01), Jordon
Myhre Charles J.
Yates Jeffrey L.
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