Air intake apparatus

Details Air intake apparatus Air intake apparatus

2007-02-13

2007-02-13

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

Reexamination Certificate

active

11098450

ABSTRACT:
An air intake apparatus has an air intake port opening outside, and an air intake path communicating the air intake port with a combustion chamber of an engine. For suppressing noise getting out from the air intake port, with respect to walls partitioning the air intake path, an opening is provided at a part of said walls corresponding to an antinode region of resonance mode of standing wave in a full length of the intake path, or at a part of noise pressure level being high in the intake path. The opening is closed with a permeable member and a noise insulating wall is disposed outside the permeable member for suppressing emission of transmitting noise passing through the permeable member. Alternatively, a vibration control member for suppressing face-vibration of the permeable member and reducing radiant noise from the permeable member is provided instead of the noise insulating wall.

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Hirose et al., “Development of low noise intake system with unreflective duct (Part 2)”, No. 10-00, ISSN 0919-1364, May 24, 2000, pp. 5-8 (Discussed on pp. 4-5 of the specification).
Office Action issued from German Patent Office issued on Nov. 14, 2005 for the corresponding German patent application No. 10322168.9-13 (a copy and English translation thereof).

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