Analysis of engine lubrication is one of the most important strategies for design engineers to reduce power loss and weight while maintaining reliability. First the theoretical model, the governing equations and the numerical procedures we used for the development of the code ACEVIM are presented. This code allows the study of EHD lubrication of four cylinder in line engines. Elastic distortion of crankshaft, bearing and motor block may be taken into account as well as dynamic loading. A parametric study is achieved for a typical four-cylinder inline engine. This study shows how the crankshaft design and consequently the crankshaft compliance influence the EHD behaviour of the engine. Decreasing the crank pin diameter of about 15 % may leads to a reduction of power losses up to 18 % at low motor rating and 8 % for the highest rotational speed.
展开▼
