Patent ID: 6640783
Filing Date: 2003-11-04
Classification: B29C,F02M

Abstract:
A composite fuel rail for supplying fuel to at least one fuel injector comprising:a) a plurality of elongated walls having at least one flat wall section defining a generally hollow fuel flow passage, said at least one flat wall section having a damping surface; b) a longitudinally extending open cross section, whereby said damping surface of at least one flat wall section is operatively arranged to flex in response to pressure pulsations; and c) a means for tuning said fuel rail to a specific frequency in response to said pressure pulsations, wherein means for tuning comprises the placement of at least one feature in at least one of said at least one flat wall section such that said dampening surface is interrupted, and wherein said at least one feature is selected from the group consisting of attaching bosses, at least one longitudinal rib, and at least one stiffening rib.