Intake arrangement for internal combustion engine

摘要

An intake arrangement for an internal combustion engine, including an intake manifold (1;100) including an intake collector (2;102) and a plurality of branch pipes (4A-4D;104A-104D) connected with the intake collector. The branch pipes extend in substantially same direction. The intake collector (2;102) includes an inlet opening (6;109) through which an intake air flow is introduced into the intake collector (2;102), and branch openings (7A-7D;107A-107D) to which branch pipes are connected. The branch openings are arranged along a longitudinal direction of the intake collector (2;102) such that as a distance thereof from the inlet opening (6,109) decreases, an amount of offset thereof from a reference streamline (S) of the intake air flow extending through substantially a center (X) of the inlet opening along the longitudinal direction of the intake collector (2;102) increases.