Abstract
KEYWORDS:
balancing, comfort, compactness, power output
ABSTRACT:
The VR5 engine associates the in-line engine features with the V-engine features. Actually, it is about a compact configuration, particularly adapted for the transversal mounting. Regarding its crankshaft, it is the same from the in-line 5 cylinders engine, i.e. with 6 main-bearings and one connecting rod per crank. What's different is a 15deg. V angle, which allows the cylinders to be on two sides and still the crankshaft to remain the same as at an inline engine. In this way, there has been achieved a low longitudinal distance between the cylinders, which - in its turn - allowed the using of a single cylinder head. This concept, first met at Lancia at a 13deg. V4, is now used by VW.
The paper deals with the balancing differences of such an engine in comparison with a classical one. There are to be solved the state of balance for primary and secondary forces and couples, thus being able to outline the difference between the two solution. Also, there will be taken into consideration the problems related with the piston added angle, thus a comparative analysis will be performed in order to see the side effects with respect to the classical solution.