Scotch yoke engine with variable stroke and compression ratio

Details Scotch yoke engine with variable stroke and compression ratio Scotch yoke engine with variable stroke and compression ratio

1983-09-09

1984-12-04

Feinberg, Craig R.

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

123 48R, 123 56R, 123 56BC, 123 56AC, 123 78R, 123 78BA, 123 78A, 123 82, 123197R, 92 131, 92 134, 74602, 74600, F02B 7528

Patent

active

044857683

ABSTRACT:
A yoke type engine wherein the orbital path of the slider is alterable to effect piston stroke and compression ratio changes. A crank component has a crankpin which carries and positions the slider. A boss of the crank component is carried by a control shaft in an offset manner. Timing gears normally drive the control shaft in synchronization with the crankshaft to maintain a constant stroke and compression ratio. Relocation of certain timing gears by an actuator causes the control shaft to rotationally advance or retard to reposition the crank component carried thereby to in turn alter the orbital path of the coaxial crankpin and slider relative to a crankshaft axis. Accordingly, high and low compression orbits for the slider may be effected to best suit engine loads. A variable length throw couples the slider to the crankshaft. The orbital path of the slider provides increased crankshaft leverage over conventional engine arrangements.

REFERENCES:
patent: 756011 (1904-03-01), Fitzgerald
patent: 2184820 (1939-12-01), Tucker
patent: 3630178 (1971-12-01), Erickson
patent: 3861239 (1975-01-01), McWhorter
patent: 4112826 (1978-09-01), Cataldo
patent: 4182288 (1980-01-01), Thauer
patent: 4270495 (1981-06-01), Freudenstein et al.
patent: 4319498 (1982-03-01), McWhorter
patent: 4401010 (1983-08-01), Eddington et al.

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