A body structure includes a generally trough-shaped first structural member having a floor, two opposed side walls having respective top edges, and an open top along a length of the first structural member defining a generally U-shaped cross-section. The first structural member has a first portion with a first flow direction therethrough and a second portion with a second flow direction therethrough different from the first flow direction, the first portion having opposed first and second ends with a first opening in the first end, the second portion having opposed third and fourth ends with a second opening in the fourth end, wherein the second and third ends are in fluid communication with each other. The first portion has a first average depth and the second portion has a deepened portion having a second average depth larger than the first average depth.

The present disclosure provides air intake ports and/or intake manifolds having an altered configuration to improve the efficiency of the air intake ports, intake manifolds, and by extension, the engine.

The present disclosure provides air intake ports and/or intake manifolds having an altered configuration to improve the efficiency of the air intake ports, intake manifolds, and by extension, the engine.

An apparatus may comprise a base member being defined by a rectangular aperture configured to receive and engage an automobile intake box, the base member being further defined by a perimeter surrounding the rectangular aperture and having at least one fastener or aperture configured to receive a fastener dimensioned to avoid disturbing the automobile intake box; a gooseneck member fixedly attached to the base member, the gooseneck member having a first end opening and a second end opening, the gooseneck member having an interior cavity configured to direct air into the automobile intake box from the second end opening to the first end opening through the interior cavity; and an interchangeable bell housing removably secured to the second end opening of the gooseneck member, the interchangeable bell housing having a frustoconical shaped cross section on at least one plane.

A snorkel installation kit includes a fender pipe and a snorkel. The fender pipe has an air intake. The snorkel has a protrusion defining an outlet that is received by the air intake of the fender pipe. The fender pipe and the snorkel are separated by a space when installed to each other.

A rectification structural body includes a pipe line configured such that air flows from an air cleaner to an airflow sensor. The pipe line has a portion bent in an arc shape. In the pipe line, an air guide plate dividing an internal space of the pipe line into an inner portion and an outer portion of the arc is provided substantially parallel with the center line of the pipe line. The air guide plate includes two ribs. The two ribs are each in an arc shape. The two ribs stand, inside the pipe line, facing each other to extend toward each other. End edges of the two ribs are separated from each other in a rib standing direction by 0.5 to 5 mm at least on an airflow sensor side of the pipe line.

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.

An engine intake air duct 1 has an intake portion 10 that extends along a first center line A, and a main duct portion 20 that extends along a second center line B. The main duct portion 20 has a merging portion 50, a discharge opening 21, and an extending portion 40 that extends from the merging portion 50 towards an opposite end to the discharge opening 20. A reflecting wall 41 is provided at an end face of the extending portion 40. The intake portion 10 merges with the main duct portion 20 in such a way that the first center line A is directed towards a downstream end of the main duct portion 20.

An engine intake duct includes an upstream side linear portion, a bend portion, a downstream side linear portion, and a fin that rises from an inner surface of the bend portion on an inner side in a bend direction. A fin tip portion is located in the bend portion, and a fin rear end portion is located in the bend portion or the downstream side linear portion, and the fin includes a tip side inclined surface, a rear end side inclined surface, and a rear end surface that is a steep wall extending from a rear end of the rear end side inclined surface to the fin rear end portion. At least a part of a top of the tip side inclined surface of the fin is formed along an extension line of an inner surface of the upstream side linear portion toward the bend portion.

A plurality of parts that constitute an intake passage connected with an intake port of an engine include a constriction part that has a protrusion formed to protrude on an inner circumferential surface side of the intake passage. The constriction part includes cylindrical connections disposed on both sides of a constriction path in which the protrusion is formed. The constriction path has an outer circumferential surface recessed inwardly in a radial direction so as to follow a shape of the protrusion. A portion recessed most of the recessed outer circumferential surface is disposed inside inner circumferential surfaces of the connections in the radial direction. The constriction path has a uniform wall thickness. The constriction part is connected upstream of the throttle body.