Apparatus and method for determining piston dimension

摘要

An apparatus and method for determining the optimum outer dimensions of a piston are disclosed. The piston has a crown with a ring belt and a skirt depending therefrom. Openings in the ring belt are configured to receive abradable rod members having end portions which extend radially outwardly from the piston surface. The radial positions of the outer end portions of the rod members are adjustable so as to locate the rod ends closely adjacent to the walls of an associated engine cylinder. Upon operation of the piston within the cylinder the rods are abraded to reveal the optimum clearance of the piston, relative to the cylinder wall, at that location.