PROJEKT VARIJABILNOG UPRAVLJANJA USISNIM VENTILIMA NA AUTOMOBILSKOM OTTOVOM MOTORU

Cilj ovog zadatka bio je projektirati sustav varijabilnog upravljanja usisnim ventilima na ĉetverotaktnom Otto motoru. U novije vrijeme se teži tome da se emisije i potrošnja goriva svedu na minimum, a da se uz to poveća snaga i okretni moment motora uz isti radni obujam motora. Jedan od načina povećanja performansi motora opisan je u ovom zadatku. Uz pomoć komercijalnih računalnih programa izvršene su simulacije rada motora koje su kasnije opisane kroz dijagrame. Iz priloženih se dijagrama jasno vidi poboljšanje performansi motora s varijabilnim upravljanjem u odnosu na osnovni model motora koji nema varijabilno upravljanje usisnim ventilima. Rezultati dobiveni simulacijom rada motora ovise o unešenim parametrima u program prilikom kreiranja modela za analizu. Što se više parametara unese to će i rezultati manje odstupati od stvarnog procesa. Na temelju dobivenih vrijednosti proračunima i simulacijama, izrađen je 3D model sklopa za varijabilno upravljanje ventilima sa sklopnim nacrtima.The main theme of my diploma thesis was to design the system of the variable inlet valve drive for automotive spark ignition in four - stroke engine. Recently, we tend to reduce emissions and fuel consumption to a minimum and to increase engine power and torque in the same engine displacement. One of the methods to increase engine performance is described in this task. Simulations of engine operation, which are later described through diagrams, were conducted with the aid of commercial computer programs. From the submitted diagrams it can be seen a clear improvement in engine performance with variable inlet valve timing in relation to the base model engine that does not have variable control of the inlet valves. The results obtained by simulation of engine operation depend on the value entered in the parameter query when creating a model for analysis. The more parameters we enter, the results less deviate from the actual process. The 3D assembly model for variable valve timing with assembly drawings is developed based on the value of calculations and conducted simulations