Hydrodynamic theory for bearings is applied to engine bearings with dynamic loads. Calculation methods are derived for computer and noncomputer use to determine film thickness, lubricant flow, temperature rise, and bearing reliability for different kinds of dynamic loads.
Experiments on test rigs with dynamic loads and in diesel engines are resulting in good correlation with calculations, and confirm the proposed methods.
Some typical behavior of bearings for diesel engines (inline and V-form) are discussed based on calculation, experimental results, and practical experience; also with respect to engine dimensions, mean effective pressure, and mean piston speed.
These calculation methods provide important information to designers of engines, especially by demonstrating physical correlations between dynamic loads and bearing behavior.