The effect of machined valve springs application on dynamic properties of electro-hydraulically driven valve train

Nowadays, the constant striving to reduce emission and increase overall efficiency over a wide range of speeds loads internal combustion engine (CE) is observed. The different methods for improving charge exchange in engine, particularly ones based on variable valve timing are sought. This variability can be achieved, among others by using electrohydraulic drive. goal present study compare dynamic parameters valvetrain utilizing unilateral drive various types springs. model such being developed authors experimentally verified was used analysis. Using Finite Element Method, models springs made through machining from single sleeves were developed. effect geometrical modernized their stiffness resulted dynamics examined.