An air intake duct includes a peripheral wall, which is formed by a compressed fiber portion made of a compression molded fiber material. The compressed fiber portion includes high-compression portions having a high compression ratio and low-compression portions having a relatively low compression ratio. The high-compression portions include circumferentially extending sections. Each circumferentially extending section is located in a plane that is perpendicular to an extension direction of the peripheral wall with part of the circumferentially extending section disposed between the low-compression portions. Each circumferentially extending section extends continuously over the entire circumference of the peripheral wall.

A flow control member for a vehicle includes a body, a plurality of mounting tabs, and a panel member. The body has an outer surface and an inner surface. An air passage through the body is defined by the inner surface. A plurality of mounting tabs extends outwardly from the outer surface of the body. Each of the mounting tabs is configured to receive a fastener to connect the flow control member to an intake passage of the vehicle. A panel member is disposed in the air passage. The panel member defines a plurality of openings therethrough.

Disclosed is an air intake manifold including a heat exchanger built into its body and including at least two ducts for supplying and removing heat-exchange liquid, the ducts extending through the wall of the body of the manifold with a liquid-tight seal and an airtight seal, which are distinct and mutually offset along the longitudinal axis of the relevant duct being created on each of the ducts. The unit creating the liquid tight seal is arranged between the relevant duct and a circulation pipe connected to the free end of the duct. The unit creating the airtight seal is positioned between the relevant duct and the body of the distributor. A leakage path associated with the liquid-tight seal is created between the latter and the airtight seal.

Systems and methods for directing and controlling air flow into an internal combustion engine are presented. In one example, an aluminum cylinder with two welded bearing holders is over molded with a short fiber reinforced polymer composite throttle body housing. The short fiber reinforced polymer composite throttle body housing may be welded to an engine intake manifold or it may be part of the engine intake manifold.

Removal and breakage of fuel piping during a vehicle front collision is prevented for an engine mounted longitudinally in an engine compartment. Embodiments include a side structure of the engine having an alternator in front of an intake manifold and fuel piping behind the intake manifold so as to extend in the vertical direction. The intake manifold includes a plurality of independent intake pipe portions each having one end portion connected to one side of the engine in a vehicle width direction, and a surge tank portion to which the other end portions of the independent intake pipe portions are connected. As seen from the rear side, a portion of the fuel piping closer to the surge tank portion is located closer to the one side of the engine in the vehicle width direction than the surge tank portion.

Interference between an intake manifold and a fuel pipe during a vehicle front collision is prevented in an engine which is longitudinally mounted in an engine room. A vehicle component is arranged on the front side of an intake manifold, and a fuel pipe is arranged on the rear side of the intake manifold. The intake manifold includes a mounting portion on the intake-air downstream end side of a plurality of independent intake pipe portions and connects each of the plurality of independent intake pipe portions to a portion of the engine on one side of the engine in the vehicle width direction. The mounting portion has a front-side mounting portion relatively positioned on the front side and a rear-side mounting portion relatively positioned on the rear side, and the rear-side mounting portion has a higher rigidity than the front-side mounting portion.

Interference between an intake manifold and a fuel pipe during a vehicle front collision is prevented in an engine which is longitudinally mounted in an engine room. A vehicle component is arranged on the front side of the intake manifold, and the fuel pipe is arranged on the rear side of the intake manifold. The intake manifold includes a plurality of independent intake pipe portions arranged side by side in the vehicle front-rear direction which branch for each of the cylinders of the engine; and a plurality of coupling portions that each couple adjacent independent intake pipe portions to each other in an integral manner A first coupling portion of the plurality of coupling portions positioned on the frontmost side has a lower rigidity than a third coupling portion of the plurality of coupling portions positioned the rearmost side.

Disclosed is an air intake manifold including a heat exchanger built into its body and including at least two ducts for supplying and removing heat-exchange liquid, the ducts extending through the wall of the body of the manifold with a liquid-tight seal and an airtight seal, which are distinct and mutually offset along the longitudinal axis of the relevant duct being created on each of the ducts. The unit creating the liquid tight seal is arranged between the relevant duct and a circulation pipe connected to the free end of the duct. The unit creating the airtight seal is positioned between the relevant duct and the body of the distributor. A leakage path associated with the liquid-tight seal is created between the latter and the airtight seal.

Disclosed is an air intake manifold including a heat exchanger built into its body and including at least two ducts for supplying and removing heat-exchange liquid, the ducts extending through the wall of the body of the manifold with a liquid-tight seal and an airtight seal, which are distinct and mutually offset along the longitudinal axis of the relevant duct being created on each of the ducts. The unit creating the liquid tight seal is arranged between the relevant duct and a circulation pipe connected to the free end of the duct. The unit creating the airtight seal is positioned between the relevant duct and the body of the distributor. A leakage path associated with the liquid-tight seal is created between the latter and the airtight seal.

A sleeve structure comprises a plurality of sleeve main bodies fitted respectively into intake ports of a cylinder head of a multi-cylinder internal combustion engine and a shared base provided on one end of the plurality of sleeve main bodies. By fixing this sleeve structure to the cylinder head, an amount of labor involved in a fixing operation for fixing sleeves to a cylinder head is reduced.