INTAKE SYSTEM FOR MULTIPLE-CYLINDER ENGINE

摘要

A intake system for a multiple-cylinder engine having a plurality of cylinders has a common intake passage (7) open to the atmosphere at its upstream end, a plurality of discrete intake passages (10a-f) which communicate the respective cylinders with the common intake passage by way of intake ports, and a circular passage (6) which is communicated with the cylinders and is adapted to propagate pressure waves generated by the intake strokes without reflecting the pressure waves. A part (6c) of the circular passage (6) which does not form a part of the intake air path through which intake air is introduced into the cylinders is smaller in cross-section (52) than a part (6a, 6b) of the circular passage (6) which forms a part of the intake air path.