Engine selectively operable in two- and four-cycle modes

Details Engine selectively operable in two- and four-cycle modes Engine selectively operable in two- and four-cycle modes

1991-09-10

1992-10-27

Okonsky, David A.

Internal-combustion engines

Convertible cycle

F02B 6906

Patent

active

051580446

ABSTRACT:
An engine is selectively operable in two- and four-cycle modes by varying the timing to open and close intake and exhaust valves on the top of a cylinder. The engine comprises first and second valve actuating mechanisms for opening and closing the intake and exhaust valves, a selective operating mechanism for operating the first valve actuating mechanism to open and close the intake and exhaust valves while the second valve actuating mechanism is disabled, and for operating the second valve actuating mechanism to open and close the intake and exhaust valves while the first valve actuating mechanism is disabled, and a rotation transmitting mechanism for transmitting rotation of a crankshaft of the engine, each time the crankshaft makes two revolutions, to the first valve actuating mechanism through the selective operating mechanism when the engine operates in the four-cycle mode, and for transmitting rotation of the crankshaft, each time the crankshaft makes one revolution, to the second valve actuating mechanism through the selective operating mechanism when the engine operates in the two-cycle mode. The rotation transmitting mechanism starts to transmit rotation of the crankshaft to the first and second valve actuating mechanism when the crankshaft has been angularly moved through a predetermined angle.

REFERENCES:
patent: 871602 (1907-11-01), Loffler
patent: 1792028 (1931-02-01), Peterson
patent: 2178152 (1939-10-01), Walker
patent: 4392459 (1983-07-01), Chareire
patent: 4535733 (1985-08-01), Honda
patent: 4546735 (1985-10-01), O'Neal
patent: 4664070 (1987-05-01), Meistrick et al.

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