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

F - Mech Eng,Light,Heat,Weapons

02

B

171/38

F02B 75/24 (2006.01) F01B 9/02 (2006.01) F02B 75/04 (2006.01)

Patent

CA 1224157

SCOTCH YOKE ENGINE WITH VARIABLE STROKE AND COMPRESSION RATIO 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 car- ries 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 to thereby alter the orbital path of the coaxial crankpin and slider relative to a crankshaft axis. High and low compression orbits for the slider may be selected to best suit engine loads. A variable length throw couples the slider to the crankshaft.

468723

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