Gas introducing structure of intake path

A gas introducing structure of an intake path of an internal combustion engine having a plurality of cylinders, the gas introducing system comprising:na common chamber;a gas introducing path introducing the gas from the common gas chamber into an intake port of each cylinder,wherein an inner peripheral surface of the gas introducing path includes:a bottom surface appearing as a straight line at a lower side of a perpendicular cross section of the inner peripheral surface; anda curved wall surface appearing as a convex curved line, connecting with each end of the straight line at an angle, at an upper side of the perpendicular cross section of the inner peripheral surface.

A gas introducing structure of an intake path of an internal combustion engine having a plurality of cylinders, the gas introducing system comprising:na common chamber;a gas introducing path introducing the gas from the common gas chamber into an intake port of each cylinder,wherein an inner peripheral surface of the gas introducing path includes:a bottom surface appearing as a straight line at a lower side of a perpendicular cross section of the inner peripheral surface; anda curved wall surface appearing as a convex curved line, connecting with each end of the straight line at an angle, at an upper side of the perpendicular cross section of the inner peripheral surface,wherein the gas introducing path is introduced into the intake path from a lower side, and a curved wall surface side of an end of the gas introducing path, opening to the intake path, projects into the intake path.

A gas introducing structure of an intake path comprising:na gas introducing path introducing a gas to an intake airflow in the intake path of an internal combustion engine,wherein an intake branch pipe of an intake manifold and an intake port formed at a cylinder head of the internal combustion engine are connected with each other at connecting end surfaces to form the intake path,wherein the gas introducing path is introduced into the intake pipe from a lower side and a curved wall surface side of an end of the gas introducing path, opening to the intake path, projects into the intake path and an end surface of the gas introducing path is formed in a manner that an intake path center side of the end surface inclines in a direction opposite to the intake airflow relative to the connecting end surface of the intake branch pipe.