The invention relates to a gudgeon pin for connecting a piston of a reciprocating internal combustion engine to a connecting-rod, composed at least in part of a fibre-reinforced composite material, and a metallic sliding bearing layer having a circular cylindrical external surface being arranged on the external surface of the fibre-reinforced composite material.
In reciprocating internal combustion engine, in particular in Otto and diesel engines, the piston and the connecting-rod are joined together by means of a gudgeon pin. This gudgeon pin transmits the forces of combustion and compression and the dynamic forces from the piston to the connecting-rod and thus to the crank shaft of the reciprocating internal combustion engine. The gudgeon pin is rotatably inserted into a bore in the connecting-rod and into a continuous bore in the piston and is secured against axial displacement by suitable means, for example by a Seeger circlip ring.
The forces acting on the gudgeon pin deform it and cause, on the one hand, bending of the pin axis and, on the other hand, ovalisation of and shear stress on the cross-section of the pin. These deformations should be minimal.