Acoustic silencer

An intake system for an internal combustion engine, comprising:

• a compressor;
• a flexible cuff coupled via a clamp to the compressor;
• and
• a resonator coupled to the flexible cuff, the resonator comprising a sleeve insert having a tubular wall with a plurality of apertures in the wall and an outer duct blow molded over the sleeve insert and the sleeve insert has a rib having one end terminating at the wall and a second end extending radially outwardly from the tubular wall of the sleeve insert with material of the second end of the rib being bonded to material of the duct, and
• wherein the outer duct extends beyond ends of the sleeve insert.

A resonator, comprising:

• an injection-molded sleeve insert having:
• a wall with a first plurality of apertures in the wall at a first axial distance and a second plurality of apertures in the wall at a second axial distance and a rib having a first end terminating at the wall and a second end extending radially outwardly from the tubular wall;
• an outer duct entirely covering the length of sleeve insert, wherein the outer duct is bonded to the sleeve insert proximate first and second ends and between the first and second pluralities of apertures and to the second end of the rib;
• wherein the outer duct extends beyond ends of the sleeve insert.

An internal combustion engine system, comprising:

• an airflow;
• a resonator;
• a conduit coupling the resonator to the airflow;
• said resonator comprising:
• a sleeve insert having:
• a wall, a first aperture in the wall at a first axial distance, a second aperture in the wall at a second axial distance, and a rib having a first end terminating at the wall and a second end extending outwardly, the rib located between the first and second apertures;
• and
• an outer duct bonded to the sleeve insert at first and second ends of the sleeve insert and at the second end of the rib;
• and
• wherein the conduit has an end disposed over, and attached onto, an end portion of the outer duct.