| 摘要 |
A piston (1, 31) and connecting rod (2) perfected for use in an internal combustion engine, comprises a connecting rod foot (3), provided with one extremity (4, 34) shaped in a spherical cup-socket (5, 35) concave on its internal surface (6), for coupling in oscillation with the lower surface (7), convex and spherical in shape, of the piston crown (8, 38); the said spherical cup-socket (5, 35) is provided with a convex external spherical surface (9) and concentric to the concave internal spherical surface (6); a retention ring (10, 40) features an concave internal spherical surface (1 1 ) coupled and sliding on the said convex external spherical surface (9) of the said cup-socket (5, 35); the ring in turn being connected in a movable fashion to the internal part of the skirt (12) of the piston (1, 31) by means of blocking elements (13), acting radially on the skirt; an axial channel (17) in the body of the connecting rod conveys lubricating oil under pressure from the crank pin; and featuring the piston (1, 31 ) equipped with an accumulation chamber (16) created in the piston crown (8, 38) adjacent to said axial channel; a limiting valve (18), subject to the action of a loading spring, reduces the outflow of oil under pressure from the crank pin to a pressure value higher than the minimum set value, said oil flowing towards the said accumulation chamber and the coupled surfaces in oscillation. |
