Intake manifold

Abstract

In an intake manifold, a downstream end of an intake introduction pipe has an intake chamber connected thereto, and a resonator is provided adjacent to a bent section of the intake introduction pipe. A resonance chamber of this resonator communicates with the intake chamber via a path-for-resonance. A bottom section of the resonance chamber representing a downward side in a gravity direction inclines downwardly toward a center in a width direction, and a communicating path is formed to communicate with the bent section of the intake introduction pipe. Condensed water accumulated in the resonator flows to the intake introduction pipe through the communicating path from the bottom section, and flows into a projection projecting downwardly from the bent section. Subsequently, the condensed water is discharged to an internal combustion engine side through a gas introduction pipe by which a blow-by gas is introduced.