A high frequency attenuating device for an air flow induction system of a vehicle employing a thermoformed fibrous mat of any shape that fits robustly inside the duct. The dissipative nature of the fibrous mat helps in achieving broadband attenuation in the high frequency regime. The ability to manufacture the fibrous mat into any shape helps with restriction, targets different attenuation bands, and makes it more feasible to manufacture. Hybrid solutions are possible when combined with low frequency perforated silencers or high frequency QWT arrays injection molded onto them.

An intake duct structure (22) of an engine intake system for an internal combustion engine of a vehicle includes a passage portion (28) internally defining an air passage having an air inlet (22A) located in an upstream end part of the passage portion and an air outlet (22B) located in a downstream end part of the passage portion, and extending above a structural member (40, 11B) of a vehicle body, and a resonator portion (29) depending from the downstream end part of the passage portion and internally defining a resonator chamber (35). The passage portion is provided with a bottom surface (28G) configured to rest on an upper surface of the structural member, and the resonator portion is provided with a vertical surface (29C) opposing a vertical surface of the structural member.

A composite resonator, such as for use in a vehicle air intake system, includes a fiber reinforced contacting a semi-crystalline polymer substrate. The fiber reinforced composite includes a plurality of fibers in a polymer matrix. The composite resonator further includes a particle coating contacting the fiber reinforced composite. The particle coating includes a plurality of particles deposited onto the fiber reinforced composite. In a vehicle air intake system, the composite resonator is connected to the air intake pathway. The vehicle air intake system also includes a turbocharger compressor connected to the air intake pathway.

A vehicle resonator includes a mounting portion provided in an air cleaner housing of a vehicle, and a resonance container mounted on the mounting portion to be replaceable in a sliding manner and having a resonance space therein communicating with an intake passage inside the air cleaner housing.

A filter element for a filter system has a hollow cylinder-type filter bellows with an end face and a substantially closed bottom provided thereat. At least one resonator structure provided at the bottom provides noise attenuation of a flowing fluid. The resonator structure has two or more grooves arranged at an outer side of the bottom and separated from each other by a partition. At least one of the grooves is connected in fluid communication through an opening to an interior of the filter element. The resonator structure, when installed in a filter housing of the filter system as intended, seals tightly relative to a complementary resonator structure of the filter housing. The grooves are connected in fluid communication through connection openings arranged in the resonator structure of the filter element and/or the complementary resonator structure of the filter housing. A filter system with such a filter element is provided.

A filter system for filtering a fluid has a filter housing with housing top part and housing bottom part, wherein the housing top and bottom parts extend along a housing axis. A filter pack arranged in the filter housing separates fluid-tightly a clean fluid side and a raw fluid side from each other. The filter pack has a filter element with a hollow cylinder-type filter bellows arranged about a longitudinal axis of the filter element. The filter element has a first substantially closed end face and a first end disk arranged thereat, wherein the first end disk is positioned opposite a second end disk of the filter element. The second end disk has a fluid passage for filtered fluid. A resonator with an end closed by a bottom is arranged inside the filter pack such that the bottom is oriented toward the first end disk of the filter element.

A space-saving broadband resonator configured to install within and utilize inner space of other components and includes a resonator insert having a tubular pipe elongated along a central axis, the tubular pipe having a circumferential outer wall having a plurality of perforation holes spaced apart and extending radially through the circumferential outer wall. An interior of the tubular pipe forms a gas flow duct. A plurality of annular disk-shaped walls provided on and projecting radially outwardly from the tubular pipe. Adjacent annular disk-shaped walls spaced axially part from each other define resonator chambers therebetween. A bell mouth is formed at the second axial end of the tubular pipe, the bell mouth flared radially outwardly.

An apparatus is provided including an air filter housing, a receiver on the air filter housing and a discrete mounting feature secured to the air filter housing at the receiver.

The invention relates to a vehicle silencer (1) for a charge air line of an internal combustion engine having a turbocharger (7), comprising: at least a first housing part (2) and a second housing part (3), wherein the housing parts (2, 3) are coupled to each other in a connection region (4) and form an outer casing (13) of the vehicle silencer (1); a resonator inner element (14), which is retained in at least one of the housing parts (2, 3), wherein at least a first (10) and a second resonator chamber (11) are formed by the two housing parts (2, 3) and the resonator inner element (14). The resonator inner element (14) has at least a first external retaining segment (50) in the region of an outer periphery (44) of the resonator inner element (14). A retaining groove (30) is formed in the first end wall (16) and/or in the second end wall (28), in which retaining grove the retaining segment (50) is accommodated.

In an air cleaner, an air cleaner case having an upper opening which opens upward is formed. The air cleaner case is formed of a front wall, a rear fender, and right and left side covers. The upper opening is closed by a seat. A sound absorbing member is bonded to a bottom plate of the seat and housed in an air cleaner space. The intake noise in the air cleaner is absorbed by the sound absorbing member.