A Dynamic Solution Method for Dynamically Loaded Bearing

The crankshaft bearing in an internal combustion engine is a typical dynamically loaded bearing. In an engine, the crankshaft and bearing constitute an inseparable system. When operating, many mechanical actions in this system happen simultaneously and influence each other. This article presents a method to obtain the journal center trajectory that considers the interaction of the crankshaft and bearing. The dynamic equations of motion of the crankshaft and the Reynolds equations were solved simultaneously to determine (calculate) the load on the bearing, the dynamic response (journal center trajectory), and the tribological performance of the bearings. The numerical results show that the journal center trajectory of a crankshaft and tribological performance of bearings calculated by this method are remarkably different from those obtained by current methods.