Optimization of the air distribution system in motor vehicle cabin using computational fluid dynamics

Abstract The paper presents the application of CFD software for simulating the conditions that prevail inside the air distributor of the vehicle's ventilation system with the aim of increasing the efficiency of the distributor. The simulation results were validated based on the experimental data found in the literature. Based on the results of the simulation, the geometry of the distributor was optimized with the aim of reducing the pressure drop through the ventilation system. It was found that optimizing the distributor geometry to some extent can provide a more energy efficient ventilation system.</jats:p

A comparison of main bearings load of two-cylinder “V” and boxer motorcycle engines

Abstract The paper deals with determining the load of the crankshaft main bearings in two-cylinder motorcycle engines. Two cylinder arrangements, used in two-cylinder motorcycle engines, are considered - the boxer-engine and V-engine. The aim of the research is to determine the influence of cylinder arrangement on the magnitude and circumferential distribution of the bearing load of the engines considered. For this purpose, models of a two-cylinder boxer engine and a corresponding V-engine crankshaft drives were developed using multibody dynamics simulation software. Previously, by using a one-dimensional gas analysis software the engine cycles were simulated in order to determine the cylinder pressure required to simulate piston dynamics. As a result of the dynamics simulations, bearing load diagrams of the boxer- and V-engine were obtained, which were then compared and analyzed.</jats:p