초록 ▼

In order to form a noise suppressor in a hose of e.g. a motor vehicle, modular portions are connected in series to define suppression chambers with particular noise suppression characteristics. Those characteristics are due to the volume of each chamber, to the size of the apertures from the chambe

In order to form a noise suppressor in a hose of e.g. a motor vehicle, modular portions are connected in series to define suppression chambers with particular noise suppression characteristics. Those characteristics are due to the volume of each chamber, to the size of the apertures from the chambers to the central duct of the suppressor, and optionally due to spacers which are inserted into at least one aperture of the chambers to alter the effective open area of that aperture. Such spacers may also be used in which the noise suppressor is not modular. Where modular portions are used, it is preferable that each chamber is bounded by parts of two modular portions. A wall of one modular portion may then close the chamber in another modular portion, making the manufacture of the modular portions easier. Also disclosed is the use of a mass acting as a damper, which may be a noise suppressor as previously discussed, within a hose. The mass is connected to the hose by resilient means, e.g. electrometric material.

대표청구항 ▼

What is claimed is: 1. A noise suppressor comprising modular portions, each having an internal duct length, said modular portions being engaged in series to define a plurality of suppression chambers and an internal duct including said duct lengths, each suppression chamber communicating with the i

What is claimed is: 1. A noise suppressor comprising modular portions, each having an internal duct length, said modular portions being engaged in series to define a plurality of suppression chambers and an internal duct including said duct lengths, each suppression chamber communicating with the internal duct via one or more apertures, each aperture having an area and each suppression chamber thereby having an associated total aperture area, wherein one combination of one of said chambers with its associated total aperture area has different noise suppression characteristics compared to a combination of another of said chambers with its associated total aperture area, and each suppression chamber is bounded by parts of two of said modular portions, so that each chamber is separated from an adjacent chamber by a respective internal wall of the modular portions, and wherein, for each two of said modular portions, there is only one chamber, and each said chamber is undivided, wherein the suppressor has at least one insert part removably mountable in the inlet of at least one chamber partially to obstruct said inlet, the insert part being arranged to affect the noise suppression characteristics of said at least one chamber. 2. A noise suppressor having modular portions engaged in series to define a plurality of suppression chambers and an internal duct, each suppression chamber communicating with the internal duct via one or more apertures, each aperture having an area and each suppression chamber thereby having an associated total aperture area, wherein one combination of one of said chambers with its associated total aperture area has different noise suppression characteristics compared to a combination of another of said chambers with its associated total aperture area, and each suppression chamber is bounded by parts of two of said modular portions, so that each chamber is separated from an adjacent chamber by a respective internal wall of the modular portions, and wherein the suppressor includes a spacer located at a gap between inner walls of adjacent modular portions, the spacer being attachable to an end of the inner wall of one modular portion, wherein the spacer has axial projections which serve to blank off part of the gap between adjacent inner walls. 3. A noise suppressor having modular portions engaged in series to define a plurality of suppression chambers and an internal duct, each suppression chamber communicating with the internal duct via one or more apertures, each aperture having an area and each suppression chamber thereby having an associated total aperture area, wherein one combination of one of said chambers with its associated total aperture area has different noise suppression characteristics compared to a combination of another of said chambers with its associated total aperture area, and each suppression chamber is bounded by parts of two of said modular portions, so that each chamber is separated from an adjacent chamber by a respective internal wall of the modular portions, each modular portion has an inner wall, said inner wall forming a duct length of the modular portion and wherein the suppressor includes a spacer located at a gap between inner walls of adjacent modular portions, the spacer being attachable to an end of the inner wall which forms the duct length of one modular portion, wherein the spacer is attachable to opposing faces of adjacent inner walls. 4. A kit of parts including at least three modular portions, each modular portion having an inner wall, a side wall and an outer wall, wherein the inner wall, side wall and outer wall partially enclose a space, each modular portion being connectable to another in order to define a plurality of suppression chambers by further enclosing the space with the side wall of said another modular portion, to give respective suppression chambers with an aperture, further including a plurality of spacers, each spacer being attachable to an end of the inner wall of a modular portion, wherein each spacer has one or more axial blanking projections. 5. A kit of parts including at least three modular portions, each modular portion having an inner wall, a side wall and an outer wall, wherein the inner wall, side wall and outer wall partially enclose a space, each modular portion being connectable to another in order to define a plurality of suppression chambers by further enclosing the space with the side wall of said another modular portion, to give respective suppression chambers with an aperture, further including a plurality of spacers, each spacer being attachable to an end of the inner wall of a modular portion, wherein each spacer is attachable to opposable faces of adjacent inner walls. 6. A hose arrangement comprising a hose with a noise suppressor located within the hose, the noise suppressor having modular portions, each modular portion having an internal duct length, said modular portions being engaged in a series to define a plurality of suppression chambers arranged in series, and an internal duct including said internal duct lengths, each suppression chamber communicating with the internal duct via one or more apertures, each aperture having an area and each suppression chamber thereby having an associated total aperture area, wherein one combination of one of said chambers with its associated total aperture area has different noise suppression characteristics from a combination of another of said chambers with its associated total aperture area, and wherein the noise suppressor has an outer wall within said hose, said outer wall partially bounding said suppression chambers, there being a resilient member between said outer wall and said hose so that said noise suppressor has a rest position towards which said resilient member urges said noise suppressor, and said hose and said noise suppressor are movable relative to each other against the urging of said resilient member by a vibrational force, thereby to dampen the vibration. 7. A hose arrangement including a hose with a noise suppressor located within the hose, the noise suppressor having modular portions engaged in series to define a plurality of suppression chambers arranged in series, and an internal duct, each suppression chamber communicating with the internal duct via one or more apertures, each aperture having an area and each suppression chamber thereby having an associated total aperture area, wherein one combination of one of said chambers with its associated total aperture area has different noise suppression characteristics from a combination of another of said chambers with its associated total aperture area, wherein the hose arrangement includes two spaced-apart suppressors within the hose. 8. A hose arrangement according to claim 7, wherein the hose is bent in the space between the noise suppressors. 9. A noise suppressor having a plurality of suppression chambers arranged in series, an inner wall of at least one of the chambers, and an internal duct, said internal duct being formed by said inner wall of the chamber, each chamber having an inlet to the internal duct, the suppressor having at least one insert part removably mountable in the inlet to the internal duct of at least one chamber partially to obstruct said inlet, the insert part being arranged to affect the noise suppression characteristics of said at least one chamber, wherein the inlet of each suppression chamber is formed by a plurality of apertures. 10. A noise suppressor according to claim 9, wherein the insert part is shaped to obstruct entirely one or more of said apertures. 11. A noise suppressor according to claim 10, wherein the insert part is engageable with the one or more apertures which it obstructs in order to locate the insert with respect to the internal duct. 12. A noise suppressor having a plurality of suppression chambers arranged in series, an inner wall of at least one of the chambers, and an internal duct, said internal duct being formed by said inner wall of the chamber, each chamber having an inlet to the internal duct, the suppressor having at least one insert part removably mountable in the inlet to the internal duct of at least one chamber partially to obstruct said inlet, the insert part being arranged to affect the noise suppression characteristics of said at least one chamber, wherein the inlet of each suppression chamber is an annular slot extending circumferentially around the internal duct, and wherein the insert part is collarshaped and has enclosed holes or slots formed in it. 13. A noise suppressor according to claim 12, wherein the slots or holes in the insert part have a different depth to the depth of the apertures, thereby to affect the coupling efficiency of the suppression chamber. 14. A hose arrangement, including a hose wall and an inner mass arranged in the space enclosed by the hose wall, the inner mass being separated from the interior of the hose wall by a resilient member so that the inner mass has a rest position towards which the resilient member urges the inner mass, and the hose wall and the inner mass are moveable relative to each other against the urging of the resilient member by a vibrational force, thereby to dampen the vibration, wherein the inner mass is a noise suppressor, said noise suppressor having modular portions engaged in series to define a plurality of suppression chambers and an internal duct, each suppression chamber communicating with the internal duct via one or more apertures, each aperture having an area and each suppression chamber thereby having an associated total aperture area, wherein one combination of one of said chambers with its associated total aperture area has different noise suppression characteristics compared to a combination of another of said chambers with its associated total aperture area, and each suppression chamber is bounded by parts of two of said modular portions, so that each chamber is separated from an adjacent chamber by a respective internal wall of the modular portions. 15. A hose arrangement, including a hose wall and an inner mass arranged in the space enclosed by the hose wall, the inner mass being separated from the interior of the hose wall by a resilient member so that the inner mass has a rest position towards which the resilient member urges the inner mass, and the hose wall and the inner mass are moveable relative to each other against the urging of the resilient member by a vibrational force, thereby to dampen the vibration, wherein the inner mass is a noise suppressor, said noise suppressor having a plurality of suppression chambers arranged in series, and an internal duct, each chamber having an inlet to the internal duct, the suppressor having at least one insert part removably mountable in the inlet of at least one chamber partially to obstruct said inlet, the insert part being arranged to affect the noise suppression characteristics of said at least one chamber. 16. A turbocharger having an inlet and an outlet, wherein an inner mass is at least partially arranged in the space enclosed by a wall of the inlet or outlet, the inner mass being separated from the interior of the wall by a resilient member so that the inner mass has a rest position towards which the resilient member urges the inner mass, and the wall and the inner mass are movable relative to each other against the urging of the resilient member by a vibrational force, thereby to dampen the vibration, and wherein the inner mass is a noise suppressor, said noise suppressor having modular portions engaged in series to define a plurality of suppression chambers and an internal duct, each suppression chamber communicating with the internal duct via one or more apertures, each aperture having an area and each suppression chamber thereby having an associated total aperture area, wherein one combination of one of said chambers with its associated total aperture area has different noise suppression characteristics compared to a combination of another of said chambers with its associated total aperture area, and each suppression chamber is bounded by parts of two of said modular portions, so that each chamber is separated from an adjacent chamber by a respective internal wall of the modular portions. 17. A turbocharger having an inlet and an outlet, wherein an inner mass is at least partially arranged in the space enclosed by a wall of the inlet or outlet, the inner mass being separated from the interior of the wall by a resilient member so that the inner mass has a rest position towards which the resilient member urges the inner mass, and the wall and the inner mass are movable relative to each other against the urging of the resilient member by a vibrational force, thereby to dampen the vibration, and wherein the inner mass is a noise suppressor, said noise suppressor having a plurality of suppression chambers arranged in series, and an internal duct, each chamber having an inlet to the internal duct, the suppressor having at least one insert part removably mountable in the inlet of at least one chamber partially to obstruct said inlet, the insert part being arranged to affect the noise suppression characteristics of said at least one chamber. 18. A turbocharger having an inlet and an outlet, wherein an inner mass is at least partially arranged in the space enclosed by a wall of the inlet or outlet, the inner mass being separated from the interior of the wall by a resilient member so that the inner mass has a rest position towards which the resilient member urges the inner mass, and the wall and the inner mass are movable relative to each other against the urging of the resilient member by a vibrational force, thereby to dampen the vibration, and wherein the inner mass is partially arranged in the space enclosed by a wall of a hose.