Macrogeometric Measurement of Camshafts of Internal Combustion Engines

Abstract

In this work, cam profiles of a camshaft are measured by a roundness measurement machine. First, the measured cam profiles are transformed into their actual sizes, based on the measurement of the bearing locations. The 8 cams of the camshaft are of two types. From the 4–4 cam profiles of each type an approximate profile is created by fitting them to one another using their base circles as reference, and calculating the center of gravity of the cumulative points of these fitted profiles corresponding to an arc segment.

Keywords

• cam profile
• profile matching
• helmert transform
• profile comparison
• reverse engineering