Patent ID: 6604506
Filing Date: 2003-08-12
Classification: F02D,F02M,Y02T

Abstract:
An intake manifold of an engine comprising:a manifold body; a plurality of intake passages branching out from a joint portion of the manifold body; a multiple on-off valve mechanism which is provided at downstream end portions of the individual intake passages, the multiple on-off valve mechanism having a plurality of on-off valves linked to a common shaft; frame members formed separately from the manifold body are fitted in the downstream end portions of individual intake passage sections, the on-off valves are placed inside the individual frame members and the shaft is passed through the on-off valves in such a way that the frame members constitute parts of inside walls of the intake passages where the on-off valves are located, the frame members rotatably supporting the on-off valves and the shaft; and wherein a cutout is formed in a surrounding wall of each frame member, the cutout extending along the intake passage axis line all across the surrounding wall and thereby making each frame member elastically expandable and compressible.