Patent ID: 7975667

Claim:
A drive shaft and piston assembly of a split-cycle four-stroke engine comprising: a rotary drive shaft; a plurality of circular eccentrics mounted on the aforementioned rotary drive shaft by means of indexing openings; a plurality of pistons the number of which corresponds to the number of the circular eccentrics; and connecting rods the number of which corresponds to the number of circular eccentrics and pistons, the connecting rods having one ends and other ends, the aforementioned one ends being pivotally connected to the respective circular eccentrics, and the aforementioned other ends being pivotally connected to the respective pistons, wherein the circular eccentrics being angularly shifted with respect to each other on the aforementioned rotary drive shaft at a phase angle that is in the range of 5° to 60°, and wherein the aforementioned indexing openings have means for changing angular positions of the circular eccentrics with respect to each other on the rotary drive shaft in the range of the aforementioned phase angle.