INTERNAL COMBUSTION PISTON ENGINE WITH VARIABLE COMPRESSION RATIO Russian patent published in 2005 - IPC

FIELD: mechanical engineering; heat engines.

SUBSTANCE: invention is aimed at improving kinematics of force transmission of piston internal combustion engine to permit control of compression ratio at simultaneous reduction of reaction in supports and second order inertia forces. According to invention, engine contains piston installed for movement in cylinder which is hinge-connected with connecting rod. Movement of connecting rod is conveyed to crank of crankshaft. To provide controllable change of compression ratio and piston stroke, transfer member is provided between connecting rod and crank to control its movement by means of control lever. Transfer member is made in from of cross lever connected with crank by means of hinge joint which is arranged in intermediate position on section between two support points. In one of support points, cross lever is connected with connecting rod, and in other point, with control lever. Control lever is hinge connected with additional crank or eccentric which provide control motions, displacing rolling axle of control lever, thus providing change of compression ratio of internal combustion engine. Rolling axle of control lever can execute cyclic motion synchronized with rotation of crankshaft.

EFFECT: reduced loads on force transmission mechanism members, improved smoothness of engine operation owing to provision of definite geometrical relationships between force transmission mechanism members.

13 cl, 10 dwg