A Measurement of Oil Film Pressure Distribution in Connecting Rod Bearing With Test Rig

In designing an optimum connecting rod, it is necessary to determine the oil film pressure (OFP) distribution at the big end under the actual engine operating conditions because it is used as the boundary conditions in a structural analysis. Since it is very difficult to measure the OFP distribution, a bearing test rig has been developed to simulate the load of an operating engine. The measured data on the cap side of the connecting rod obtained with this test rig shows a lower maximum oil film pressure and a wider pressure angle than those on the rod side. Presented at the 46th Annual Meeting in Montreal, Quebec, Canada April 29–May 2, 1991