Patent ID: 8683971

Claim:
An intake manifold comprising: a first piece comprising: a first branch pipe half portion; and an intake air introducing portion through which air is to flow to an intake air chamber; and a second piece connected to the first piece by vibration-welding and comprising: a second branch pipe half portion connected to the first branch pipe half portion, the first and second branch pipe half portions defining a branch pipe portion through which air is to flow from the intake air chamber to intake ports of cylinders of an engine; an additional body connected to the intake air introducing portion, the second branch pipe half portion and the additional body being spaced apart from each other at a predetermined distance; and a connecting portion connecting the second branch pipe half portion to the additional body, wherein the connecting portion faces the first piece with a predetermined gap between the connecting portion and the first piece in a vibrating direction of vibration-welding, and wherein the connecting portion of the second piece directly connects the second branch pipe half portion of the second piece to the additional body of the second piece.