Abstract: An intake duct 1 is provided, particularly for taking air in an internal combustion engine, notably the engine of an automobile. The duct includes a first wall 2 made of a porous material, wherein a film 4 is 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 film 4 is fixed onto the porous wall 2 such that at least 50% of the surface of the film facing the porous wall 2 is not fixed thereto.

Abstract: An intake duct 1 is provided, particularly for taking air in an internal combustion engine, notably the engine of an automobile. Said duct includes a first wall 2 made of a porous material, wherein a film 4 is 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. Said film 4 is fixed onto said porous wall 2 such that at least 50% of the surface of said film facing said porous wall 2 is not fixed thereto.

Abstract: A silencing apparatus to be fitted between a first air or fluid intake duct (1) and a second air or fluid exhaust duct (2), said silencing apparatus being notably fitted between an engine turbine and a thermal exchanger and including a cylindrical main hollow body (3), a cylindrical input connection (4) and a cylindrical output connection (4′) with one or a plurality of straight sections smaller than the straight section of said main body (3), and at least one partitioning part (8) defining with the internal surface of said main hollow body at least two toric chambers (9, 10).

Abstract: Thermoformed intake duct (1) made of non-woven material and including flanges (6, 7, 8, 9) parallel to the longitudinal axis of the duct, projecting from the outer surface of the duct, a first portion (4) of the duct being formed in the form of a first bellows, a first bellows-shaped portion (4) having two longitudinal flanges (6, 7) diametrically opposed along a first diameter (D2), characterized in that the duct includes at least a second bellows-shaped portion (5) having two longitudinal flanges (8, 9) diametrically opposed along a second diameter (D3) of the duct which makes, with respect to the first diameter (D2) of the two flanges (6, 7) of the first bellows-shaped portion, a non-zero angle, and especially 90°.

Abstract: Air filter (F), especially for an internal combustion engine motor vehicle, comprising a duct (1) for coupling to an intake duct (5), a female portion (3) of the connecting duct being intended to cover a male portion of the intake duct, characterized in that the female portion (3) has two parallel longitudinal openings (7), the two openings (7) being preferably diametrically opposed, and the female portion (3) includes an end-piece in the form of a frustoconical chamfer (4), so that the female portion (3) is of greater size in cross section than the remainder (2) of the coupling duct (1), and means, preferably removable means, are provided for fastening the filter to the intake duct (5).

Abstract: Thermoformed intake duct (1) made of non-woven material and including flanges (6, 7, 8, 9) parallel to the longitudinal axis of the duct, projecting from the outer surface of the duct, a first portion (4) of the duct being formed in the form of a first bellows, a first bellows-shaped portion (4) having two longitudinal flanges (6, 7) diametrically opposed along a first diameter (D2), characterized in that the duct includes at least a second bellows-shaped portion (5) having two longitudinal flanges (8, 9) diametrically opposed along a second diameter (D3) of the duct which makes, with respect to the first diameter (D2) of the two flanges (6, 7) of the first bellows-shaped portion, a non-zero angle, and especially 90°.

Abstract: A silencing apparatus to be fitted between a first air or fluid intake duct (1) and a second air or fluid exhaust duct (2), said silencing apparatus being notably fitted between an engine turbine and a thermal exchanger and including a cylindrical main hollow body (3), a cylindrical input connection (4) and a cylindrical output connection (4′) with one or a plurality of straight sections smaller than the straight section of said main body (3), and at least one partitioning part (8) defining with the internal surface of said main hollow body at least two toric chambers (9, 10).

Abstract: A thermal exchanger to be implemented in the air intake circuit of an internal combustion engine, notably in an intake splitter which includes a hollow plastic body (1) that defines an air intake chamber (2), an entry (3) for air and one or many exits which communicate with the head of the engine. The thermal exchanger constitutes of a chamber (5), at least part of which is in a plastic material, and which features a first opening towards the outside, a second opening (7) that communicates with the intake chamber (2), a third opening (8) that communicates with a canal (9) which supplies coolant fluid, a fourth opening (10) that communicates with a canal (11) which carries the coolant fluid out, a metallic assembly that forms the hot part of the exchanger.

Abstract: A sealing-tight pipe with acoustic damping for the transport of gaseous fluids, inter alia for the admission of air for combustion into a motor vehicle heat engine, characterised in that it comprises a first layer 1 of a porous material which is permeable to the gaseous fluids and a second layer 4 consisting of a thin film, attached to the first layer but not adhering thereto, of a flexible fluid-tight material which is mechanically deformable reversibly.

Abstract: A pipe for the ducting of gaseous fluids, notably in cars, characterised in that it includes a porous interior tube (1), permeable to gaseous fluids and likely to lessen noise transmission, and an exterior tube (2), which is essentially rigid and forms an envelope distant from the interior tube, in a material essentially non-permeable to gaseous fluids.

Abstract: A pipe for carrying gaseous fluid, more particularly in motor vehicles, and particularly for the admission of air for combustion to the engine or for ventilation of the vehicle interior, including an outer layer (1) of a fluid-tight flexible material and a non-woven fibrous inner layer (2) secured to the outer layer (1).

Abstract: A liquid-impervious tube, includes at least one first band helically wound on itself, characterized in that this first band is porous and pervious to gaseous fluids and in that it includes a second thin band which is pervious to gaseous fluids and impervious to liquids, and which is also helically wound on itself, with partial overlapping of its turns, said turns being secured to one another in a impervious manner so that the second band defines a liquid-impervious continuous covering.