Internal-combustion engines – Transmission mechanism from piston – Crankshaft and connecting rod
Patent
1996-11-08
1997-10-28
McMahon, Marguerite
Internal-combustion engines
Transmission mechanism from piston
Crankshaft and connecting rod
123 78E, 123 48B, F02B 7532
Patent
active
056808402
ABSTRACT:
A variable stroke engine has a piston slidably mounted in a cylinder for reciprocal linear movement therein. The engine includes first and second parallel crankshafts having first and second crank pins, respectively. A connecting assembly connects the piston to the first and second crankshafts. The connecting assembly includes an oscillating member pivotally connected to the piston at a first connection. The assembly further includes first and second connecting rods rotatably connected to the first and second crank pins, respectively. The first and second connecting rods are further rotatably connected to the oscillating member at respective second and third connections. The second and third connections are offset from the first connection and offset from each other such that the first and second connecting rods are arranged in a crossing relationship. Synchronizing gears establish co-rotation of the first and second crankshafts and synchronize an angular phase relationship between the crankshafts. A phase adjustment mechanism connected to the synchronizing gears adjusts the angular phase relationship between the crankshafts, thereby varying the amplitude of the reciprocal linear movement of the piston.
REFERENCES:
patent: 4449494 (1984-05-01), Beaudoin
patent: 4690113 (1987-09-01), Delano
patent: 5077976 (1992-01-01), Pusic et al.
patent: 5216927 (1993-06-01), Mandelia
patent: 5435232 (1995-07-01), Hammerton
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