Intake manifold and manufacturing method thereof

摘要

The invention provides an intake manifold in which the number of parts or the number of processes of assembling can be reduced, and which is easy to assemble and assuring largely freedom in designing location of an intake control valve. An intake manifold 1 includes a hollow shell 2 and an intake control valve 3 functioning to control a combustion air-intake of an internal combustion engine. The shell 2 is formed by joining integrally a pair of half bodies 2 a , 2 b having a configuration of the shell 2 being halved in tube axial direction. The intake control valve 3 is built in forming an integral part at the time of joining the half bodies 2 a , 2 b together.