An aftertreatment system for treating a high-volume exhaust flow is provided. The aftertreatment system includes a first module having a first mixing element, and a second module having a second mixing element. The aftertreatment system also includes a main inlet conduit, a first inlet conduit, a second inlet conduit, a first outlet conduit, and a second outlet conduit. Each of the first inlet conduit and the second inlet conduit is adapted to split the exhaust flow downstream of the main inlet conduit into a first stream and a second stream flowing therethrough respectively. The splitting of the exhaust flow is adapted to limit a backpressure within the aftertreatment system. Each of the first mixing element and the second mixing element is adapted to improve a mixing of the first stream and the second stream within the first module and the second module respectively.

Two end caps with metal straight tubing inserted into a muffler canister, Then affixed to a motorcycle header pipes that's connected to a combustion engine, Particularly a motorcycle engine, Where exhaust gas discharges through both creating more engine performance and sound.

An internal combustion engine exhaust system muffler (1) has a housing (2) within which two chambers (3) are formed with an inner panel (4) arranged therebetween. The inner panel (4) has at least one collar (8) at the edge, which has an outer side (9) facing the housing (2), and wherein the housing (2) has, on an inner side (11), in the area of the inner panel (4), at least one contour (12), which faces the collar (8) and with which the collar (8) is in contact. Reduced noise generation, reduced wear as well as prolonged service life can be achieved with the outer side (9) of the collar (8) forming a cone structure (10) in profile and the contour (12) of the housing (2) forms a cone structure seat (13) with a complementary cone profile and with which the cone (10) is flatly and non-positively in contact.

An injection device (14), for introducing a reducing agent (11) into an exhaust gas stream (8) of an exhaust system (7) of an internal combustion engine (1), has an exhaust pipe (15) for guiding the exhaust gas stream (8), which has a connecting piece opening (18) in a wall (17). A connecting piece (16) is inserted with an inner end (19) into the connecting piece opening (18) and is provided for connecting an injector (10) at an outer end (20). Simplified assembly is achieved if the connecting piece (16) has, at an inner end (19), a laterally projecting, fully circumferentially extending collar (22). The collar (22) is in contact, on an inner side (23) of the wall (17), with an opening edge (24) enclosing the connecting piece opening (18) and is welded to the wall (17).

A manifold system for an internal combustion engine, having a housing, which is designed as a collecting manifold and which has two inlet openings and an outlet opening for the flow connection of two outlets of an internal combustion engine to an exhaust system and at most two connection openings provided on the housing for connecting a double-shell inner air-gap-insulated manifold. An exhaust system is developed in such a way that, at the same time, the tone of the exhaust gas noise and thus of the exhaust system is optimized over a plurality of important rotational speed ranges of the internal combustion engine by a modular assembly. For this purpose, at least one separate inner air-gap-insulated manifold having a connection opening, an inlet opening, and an outlet opening is provided, which is connected to the housing by the outlet opening, and at least one separate outer air-gap-insulated manifold having an inlet opening and an outlet opening is connected to the connection opening of the inner air-gap-insulated manifold. All air-gap-insulated manifolds are completely formed of sheet metal, and each air-gap-insulated manifold has a separate one- or multi-part inner shell and a one- or multi-part separate outer shell. All inner air-gap-insulated manifolds are structurally or geometrically identical and all outer air-gap-insulated manifolds are structurally or geometrically identical, wherein the inner air-gap-insulated manifolds are not structurally identical and not geometrically identical to the outer air-gap-insulated manifolds.

A component of the exhaust aftertreatment system includes a metallic body having a tapered portion. The component of the exhaust aftertreatment system further includes a curved plate arranged within the tapered portion of the metallic body. The curved plate has a plurality of perforations disposed on the curved plate to facilitate distribution of an exhaust mixture flowing through the curved plate across a surface of a substrate.

An exhaust gas treatment device, especially for an exhaust system of an internal combustion engine of a vehicle, includes a housing (12) elongated in a direction of a housing longitudinal axis (L). An exhaust gas treatment unit (18) is arranged in the housing (12). At least one first exhaust gas guiding device (24) is in flow connection with an axially open axial end area (16) of the housing (12). The first exhaust gas guiding device (24) provides a first flow path area (38) extending along an outer side (22) of the housing (12) as well as a second flow path area (47) connecting the first flow path area (38) with the axially open axial end area (16) of the housing (12).

An engine exhaust apparatus includes an exhaust passage for flowing exhaust gas emitted from an engine, a flow rectifier for rectifying the flow of the exhaust gas, and an exhaust heat recovery unit disposed in the exhaust passage downstream of the flow rectifier. The exhaust heat recovery unit is provided with an exhaust heat recovery portion and a cooling portion to cool the exhaust heat recovery portion. The engine exhaust apparatus further includes a first diameter reducing portion gradually reduced in diameter toward the exhaust heat recovery unit from the flow rectifier, and a second diameter reducing portion gradually reduced in diameter toward the downstream from the exhaust heat recovery unit.

A water drainage assembly for an aftertreatment system includes: a first tube configured to be coupled to an outlet conduit of the aftertreatment system; a second tube having a first end coupled to an outer surface of the first tube, a second end opposite the first end, and an intermediate portion located between the first end and the second end; and a baffle plate located in the second tube. The intermediate portion of the second tube surrounds an end portion of the first tube such that a volume is defined between the end portion of the first tube and the intermediate portion of the second tube. The second tube comprises a drain port configured to allow water to drain from the volume defined between the end portion of the first tube and the intermediate portion of the second tube.

An exhaust pipe has an upstream-side exhaust pipe extending downward from an engine to house a catalyst for exhaust gas purification, and a downstream-side exhaust pipe located downstream of the upstream-side exhaust pipe, and extending upward from the catalyst and then bending downward. Under a configuration in which an exhaust pipe is disposed below an engine, with a simple configuration, a catalyst is hardly exposed to water.