Air induction system for internal-combustion engine

Method of manufacturing an air collector for guiding a flow of air from an air inlet to an intake port body of an internal combustion engine via at least first and second sequentially connected air flow passages, said method comprising the steps of:

• providing a first air flow body having a concave transverse cross section formed by longitudinal side walls connected by a longitudinal top wall, said side walls and top wall defining a longitudinal channel;
• providing a second air flow body having a concave transverse cross section formed by longitudinal side walls connected by a longitudinal top wall, said side walls and top wall defining a longitudinal channel;
• inserting said second air flow body into said first air flow body, whereby said first air flow passage is defined by said longitudinal channel of said first air flow body and said second air flow passage is defined by said longitudinal channel of said second air flow body, said first and second air flow passages being separated by said top wall of said second air flow body.

An air collector for guiding a flow of air from an air inlet to an intake port body of an internal combustion engine, said air collector comprising:

• at least first and second air flow passages for connecting said air inlet with said intake port body, said at least first and second air flow passages being sequentially connected with respect to said flow of air and arranged longitudinally adjacent each other, with each air flow passage separated form an adjacent air flow passage by a shared wall;
• wherein said first and second air flow passages are formed by first and second air flow bodies, each having a concave transverse cross section formed by longitudinal side walls connected by a longitudinal top wall, said side and top walls forming a longitudinal channel, said second air flow body being nested in said first air flow body, whereby said first air flow passage is formed in said channel of said first air flow body, and said second air flow passage is formed in said channel of said second air flow body, and said top wall of said second air flow body forms said shared wall.

An air collector for guiding a flow of air from an air inlet to an intake port body of an internal combustion engine, said air collector comprising:

• at least first and second air flow paths for connecting said air inlet to said intake port body, each of said first and second air flow paths comprising a passage section connected in fluid flow communication with said air inlet and a collector section connected in fluid flow communication with said intake port body, said passage section and said collector section being sequentially coupled in fluid flow communication with each other, disposed longitudinally adjacent to each other, and separated from each other by a shared wall;
• wherein said collector section of said first air flow path and said collector section of said second air flow path are disposed laterally adjacent each other and separated by a shared wall having an opening therein and a control valve for progressively closing off said opening, to regulate a resonance point of a respective air column in each of said respective air flow paths.