Continuously variable device for stroke volume and compression ratio with the internal angle of the cylinder core shaft and connecting rod small end locus as an acute angle

摘要

PROBLEM TO BE SOLVED: To provide a device having a stroke volume and a continuously variable compression ratio, which is compact and can reduce vibration in the entire range of use. SOLUTION: In a piston 11 and a crankshaft 15 connected by three links, a connecting rod small end axis CSb at the top dead point, a crank pin axis CSt and a crank journal axis Oj are connected in a straight line. A variable control arm in which the inner angle of the cylinder core shaft Y is sharp, the small end of the connecting rod is stroked linearly with a guide rail or arcuate with an arm, and the swing shaft is arranged on the opposite side of the crank to the cylinder core shaft Y. By changing the position of the swing shaft of the piston rod, the stroke locus of the large end of the piston rod is changed and the stroke volume and compression ratio are continuously changed. [Selection diagram] Fig. 1