Gas intake manifold for internal combustion engine of motor vehicle, has conduits in which gas circulates along same direction and reverse directions, where areas of cross sections of conduits are equal

摘要

The manifold (1) has conduits (4, 5) in which gas circulates along same direction (20) and in reverse directions, where one of the conduits surrounds the other conduit. Areas of cross sections of the conduits are equal, where the cross sections have circular, polygonal or elliptical shapes. A portion (11) connects the conduits and includes an element (10) forming a wall (19). The corresponding conduit is defined by a lower wall (7) and an upper wall (8) that is connected to the element.