The disclosure relates to an air filter assembly for cleaning an air stream for a commercial vehicle, including a pre-filter communicating with an air intake and a first fine filter which is provided downstream of the pre-filter in the direction of the air stream and, together with the pre-filter, is associated with an air filter part which extends vertically in a predetermined installation position. A redundant second fine filter, which is associated with an air filter part which extends horizontally in the predetermined installation position, follows the first fine filter in the direction of the air stream, the horizontally extending air filter part being a component of a syphon-like conduit region which rises in a curved manner in the direction of an air outlet, starting from the redundant second fine filter.

The disclosure relates to an air filter assembly for cleaning an air stream for a commercial vehicle, including a pre-filter communicating with an air intake and a first fine filter which is provided downstream of the pre-filter in the direction of the air stream and, together with the pre-filter, is associated with an air filter part which extends vertically in a predetermined installation position. A redundant second fine filter, which is associated with an air filter part which extends horizontally in the predetermined installation position, follows the first fine filter in the direction of the air stream, the horizontally extending air filter part being a component of a syphon-like conduit region which rises in a curved manner in the direction of an air outlet, starting from the redundant second fine filter.

An intake system component for an internal combustion engine includes a tubular curved portion extending in a curved manner. The curved portion includes an inner wall located on an inner side of a curve relative to an inner passage. The inner wall is made of a breathable fibrous molded body. A part of the curved portion excluding the inner wall includes a portion having a lower breathability than the inner wall.

This air intake apparatus includes an air intake apparatus main body including a plurality of pieces bonded to each other along a split plane and an external gas passage formed inside the air intake apparatus main body by bonding the plurality of pieces to each other and including an external gas receiving port that directly receives external gas from a cylinder head and an external gas introduction port that introduces the external gas into a surge tank.

Disclosed herein is an actuator for an intake manifold, wherein the actuator may include: a housing having a negative pressure space; an operating unit operated by the pressure of air introduced into and discharged from the negative pressure space, and rotating the variable valve; an exhaust flow path connected to an external negative pressure supply source; an intake flow path receiving external air which raises the pressure of the negative pressure space; a spool hole formed in the housing so as to communicate with the exhaust flow path and the intake flow path; an air entry and exit flow path formed in the housing so as to communicate with the negative pressure space and the spool hole; a valve body selectively opening/closing the exhaust flow path and the intake flow path; and a solenoid unit operating the valve body.

The present disclosure aims to stabilize, in an engine with a supercharger, a detection result of an intake air temperature sensor interposed between the supercharger and an intercooler. A gas outlet of a supercharger and a gas inlet of an intercooler are connected together via a second passage. The second passage includes, in its middle position, a narrow region with a smaller cross-sectional area than the part of the second passage extending from an upstream end of the second passage to the middle position. The narrow region is provided with the intake air temperature sensor configured to detect the gas temperature in the narrow region.

An intake manifold is provided that controls swirl on entry to a combustion chamber. Each intake manifold includes a fin or rib portion positioned to reduce or eliminate swirl induced by the configuration of the intake manifold, particularly when used in a large engine having a left bank and a right bank of combustion chambers. By controlling swirl induced by the intake manifold, charge motion consistency is improved between engine cylinders and between the left bank and the right bank, thereby improving the consistency of combustion and power output, improving efficiency and reducing emissions (e.g., decreased particulate emissions (also described as smoke), hydrocarbon emissions, and NOx emissions), and further including an improved knock margin, improved fuel economy, wider rich and lean limits, etc.

A composite intake system and method of operating a rotary engine with variable intake manifold is provided. The system includes two switching valves in a secondary intake switching tube to change the intake method. When the rotary engine works under low speed conditions, it adopts the long intake manifold and the side-intake mode. When the rotary engine works under medium and high speed conditions, it uses the short intake manifold and the composite-intake mode. When the rotary engine works under ultra high speed conditions, it takes the short intake manifold and the peripheral-intake mode.

An intake duct includes a duct body. The duct body includes an upstream opening and a downstream opening. The duct body includes a twisted and bent portion. The twisted and bent portion includes a first side section and a second side section. The upstream opening and the downstream opening respectively include first sections, which are on a first side in the height direction. The upstream opening and the downstream opening respectively include second sections, which are on a second side in the height direction. The twisted and bent portion is twisted and bent such that the first side section connects the first section of the upstream opening and the second section of the downstream opening to each other, and the second side section connects the second section of the upstream opening and the first section of the downstream opening to each other.

An intake tube has an inner and outer curved surface adjacent a turbocharger. A crankcase hose connects to the inner curved surface at a hose opening. Upstream ends of first and second struts straddle the hose opening and extend between and connect to the inner and outer curved walls. The struts have an oval-shaped cross section with a larger upstream end that forces air between the two struts and between each strut and the adjacent tube wall to create a low pressure at the hose opening to draw gases from the hose into the intake and turbocharger.