Porous duct configured with a thin film

Details Porous duct configured with a thin film Porous duct configured with a thin film

2005-04-12

2005-04-12

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Intake manifold

Manifold material or composition

C138S141000, C184S025000

Reexamination Certificate

active

06877472

ABSTRACT:
An intake duct1is provided, particularly for taking air in an internal combustion engine, notably the engine of an automobile. The duct includes a first wall2made of a porous material, wherein a film4is implemented which is sufficiently thin for avoiding any incidence upon the acoustical characteristics, having notably a surface mass of less than 100 grams per square meter. The film4is fixed onto the porous wall2such that at least 50% of the surface of the film facing the porous wall2is not fixed thereto.

REFERENCES:
patent: 3183941 (1965-05-01), Woodell
patent: 3205913 (1965-09-01), Ehlers
patent: 5379806 (1995-01-01), Matthews et al.
patent: 5947158 (1999-09-01), Gross et al.
patent: 197 50 102 (1999-06-01), None
patent: 1 170 499 (2002-01-01), None

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