An intake structure of a vehicle is provided to prevent engine oil from flowing back along a nipple. The structure includes an intake hose which is mounted between an air cleaner and a compressor of a turbo charger. A pocket part, in which the oil comprised in a blow-by gas through the nipple is collected, is formed on the inner sidewall surface of the intake hose. The intake structure prevents the oil existing in the recirculated blow-by gas from flowing into a fresh air nipple.

A straddled vehicle includes an air cleaner and a resonator. The air cleaner includes an air cleaner case, an air-cleaning element arranged inside the air cleaner case, and a duct that is attached to the air-cleaning element. At least a portion of the duct is arranged inside the air cleaner case, and the duct guides the air toward the air-cleaning element. The resonator has an outer wall arranged around the duct. The duct and the outer wall together define at least a portion of a resonance chamber of the resonator.

The invention relates to a fluid pipe arrangement (100), in particular for a charged air duct of an internal combustion engine, comprising a housing (10) having a longitudinal extension (L). The housing (10) includes a first fluid duct (20) having a first fluid inlet (22) and a first fluid outlet (24) for a first fluid and at least one second fluid duct (30) having a second fluid inlet (32) and a second fluid outlet (34) for a second fluid. Thermal insulation means (40) are provided between at least a portion (38) of the second fluid duct (30) and at least a portion (28) the first fluid duct (20).

Systems and methods are provided for an air filter device. In one example, the air filter device includes a housing enclosing a filter element positioned in a filter enclosure, the filter element including an outlet in fluidic communication with a downstream intake line and an inlet conduit extending through the housing and delivering air to the filter enclosure, and the inlet conduit including a wall dividing the filter enclosure from the inlet conduit. The air filter device further includes a cover sealingly attached to the wall and a peripheral lip of the housing.

An intake pipe includes a cylindrical pipe main body, a flange, which is provided on an end of the pipe main body in an axial direction and protrudes radially outward about an axis of the pipe main body from an outer surface of the pipe main body, and a chamber forming portion, which is located outside of the pipe main body and defines a chamber. The chamber forming portion is provided to connect the outer surface of the pipe main body and the flange to each other and is integrated with the pipe main body and the flange.

A system for reducing noise associated with a compressor of an engine system comprises an intake manifold and a resonator comprising an outlet. The resonator is coupled to, and is positioned adjacent to, the intake manifold. An outlet pipe is in fluid communication with the outlet and the compressor, and a length of the outlet pipe extends from the outlet to the compressor. Positioning the resonator adjacent to the intake manifold reduces the length of the outlet pipe so as to reduce noise associated with air flowing through the outlet pipe.

A supercharger assembly comprises a housing, a rotor bore with an outer wall, an outlet in an outlet plane, an inlet in an inlet plane perpendicular to the outlet plane, and an outlet divider wall. The supercharger assembly comprises a first recess, a first perforated material covering the first recess, and an outlet resonator. The first recess is separated from the outlet by the outlet divider wall. The first recess is located between the outer wall and the first perforated material.

A straddled vehicle includes an air cleaner and a resonator. The air cleaner includes an air cleaner case, an air-cleaning element arranged inside the air cleaner case, and a duct that is attached to the air-cleaning element. At least a portion of the duct is arranged inside the air cleaner case, and the duct guides the air toward the air-cleaning element. The resonator has an outer wall arranged around the duct. The duct and the outer wall together define at least a portion of a resonance chamber of the resonator.

A resonator includes: an inner pipe having first openings penetrated into an outer peripheral surface thereof from an inner peripheral surface thereof and second openings spaced apart from the first opening; a first cover adapted to allow a first resonant space to be formed between the outer peripheral surface of the inner pipe and the inner peripheral surface thereof, the first resonant space communicating with the internal space of the inner pipe through the first openings; and a second cover adapted to allow a second resonant space to be formed between the outer peripheral surface of the inner pipe and the inner peripheral surface thereof, the second resonant space communicating with the internal space of the inner pipe through the second openings.

Provided is a silencer including: an expansion chamber having a cuboid shape; a first pipe for being coupled to a noise source, the first pipe being coupled to an approximate center of a first surface of the expansion chamber; and a second pipe coupled to an approximate center of a second surface of the expansion chamber adjacent to the first surface. The expansion chamber has an internal space and a partition in the internal space, the partition is disposed upright on a third surface of the expansion chamber opposed to the second surface of the expansion chamber to extend from the third surface toward the second surface, and the second pipe has a central axis substantially included in the partition.