Test bed for testing tribological properties of system formed by crank pin and half-bearings of mobile coupling of internal combustion engine of car, has arm applying repeated and cyclic stress on connecting rod head for simulating forces

摘要

The bed (31) has a motor shaft (34) adapted to rotate a crank pin (10) bored from a crankshaft against which half-bearings (17) are held in contact by a connecting rod head (19). An arm (41) applies repeated and cyclic stress on the connecting rod head for simulating forces applied to a system formed by the crankpin and the half-bearings during an actual operation of an internal combustion engine of a car. The arm is movably mounted in rotation around an axis (43) approximately perpendicular to an axis of the motor shaft resting against the head. An independent claim is also included for a method for testing tribological properties of a system formed by a crank pin and half-bearings of a mobile coupling of an engine of a car.