A spherical decoupler conduit for connecting misaligned components, and a method for making the same, where the spherical decoupler includes an inlet connection with a first spherical portion; an outer slider with a second spherical portion for pivotably mating with the first spherical portion and a tubular portion; an inner slider having a tubular portion in a telescoping relationship with the tubular portion of the outer slider and a third spherical portion; and an outlet connection with a fourth spherical portion for pivotably mating with the third spherical portion.

An exhaust device includes: an exhaust chamber defining within an exhaust gas passage an expansion space in which exhaust gas is allowed to expand; a chamber inlet pipe coupled to the exhaust chamber and having a downstream end that is open to the expansion space; a first catalyst located in the exhaust gas passage upstream of the expansion space; and a second catalyst located in the chamber inlet pipe in opposition to the expansion space.

An exhaust component includes a first member and a second member. The first member forms a first flow path for exhaust gas. The second member forms a second flow path that has a smaller cross-sectional area than the first flow path. The first member includes a hole-forming portion forming a through hole. The hole-forming portion includes an edge portion, the edge portion protruding toward an outside of the first member in a manner curved from a periphery of the through hole, the edge portion surrounding the through hole. The second member includes an upstream end portion located on an upstream side of the second flow path, the upstream end portion being joined to the hole-forming portion to cover an outer-peripheral surface of the hole-forming portion. The second flow path is for the exhaust gas that has passed through the through hole and flowed in from the upstream end portion.

A marine vessel includes a hull, an engine, and an exhaust manifold including four upstream exhaust holes connected to four exhaust ports, respectively, one downstream central exhaust hole defined by two central upstream exhaust holes of the four upstream exhaust holes, two downstream side exhaust holes located downstream of the four upstream exhaust holes in an exhaust flow direction and spaced from and adjacent to the downstream central exhaust hole on both sides of the downstream central exhaust hole, and a water jacket. The water jacket is located in the exhaust manifold such that cooling water flows between the downstream central exhaust hole and the downstream side exhaust holes.

A vehicle includes: an EHC which is provided in an exhaust passage of an internal combustion engine and of which the temperature can be raised by application of a current; a tubular first case housing the EHC; an insulation coat disposed between an inner wall of the first case and an outer circumference of the EHC so as to surround the outer circumference of the EHC; a constricted part that is provided at an end portion of the first case on a downstream side in a flow direction of an exhaust gas to reduce the inside diameter of the first case along the flow direction; and an EGR passage connected to the constricted part.

A flow device for a mixer of an exhaust aftertreatment system. The flow device includes a plate and a plurality of conduits coupled to the plate. Each of the conduits includes a first sidewall extending outward of the plate, a second sidewall extending outward of the plate and opposing the first sidewall, a main wall extending from the plate and between the first sidewall and the second sidewall, a conduit inlet coplanar with the plate and that receives exhaust, and a conduit outlet forming an angle between 35 degrees and 145 degrees, inclusive, with the plate. The conduit outlet releases the exhaust received from the conduit inlet.

A marine vessel includes a hull, an engine, and an exhaust manifold including four upstream exhaust channels connected to four exhaust ports, respectively, one downstream central exhaust channel defined by two central upstream exhaust channels of the four upstream exhaust channels, two downstream side exhaust channels located downstream of the four upstream exhaust channels in an exhaust flow direction and spaced from and adjacent to the downstream central exhaust channel on both sides of the downstream central exhaust channel, and a water jacket. The water jacket is located in the exhaust manifold such that cooling water flows between the downstream central exhaust channel and the downstream side exhaust channels.

A flow guide and a method therein, including dividing by a divider a mixing chamber to input and output sides; supporting a mixing tube in the mixing chamber, receiving exhaust gas by an intake section from the input side; guiding the received exhaust gas by a swirl guide to flow inside the mixing tube towards the second end as a rotating and advancing main flow; mounting a reactant doser by a reactant doser mount such that when in use, it provides reactant to a dosing section; guiding exhaust gas through the divider by the mixing tube; receiving at least most of the rotating and advancing exhaust gas flow by the dosing section; providing a stem guide around the doser when mounted facing the rotating flow, and defining by the stem guide a central opening surrounding the doser when mounted; and guiding, using a passage structure of the stem guide, a side flow out of the rotating flow to a carrier flow around the doser via the central opening.

An exhaust duct assembly for conveying exhaust gases emanating from a combustion zone to atmosphere is disclosed. The assembly includes: an exhaust gas outlet for exhausting exhaust gas into the atmosphere; and an acoustic duct portion located upstream of the exhaust gas outlet, the acoustic duct portion having a peripheral wall defining a through-passage arranged and constructed to promote propagation of sound there-through. The acoustic duct portion has a length in a flow direction that is at least 50% of an average hydraulic diameter of the through-passage.

An exhaust structure for an exhaust manifold associated with an engine includes a first inlet section that defines a first inlet flow passage configured to receive exhaust gas, the first inlet flow passage defining a normalized cross-sectional area of flow, a second inlet section that defines a second inlet flow passage configured to receive exhaust gas, the second inlet flow passage defining the normalized cross-sectional area of flow, and an intermediate section disposed between the first inlet section and the second inlet section and in fluid communication with each of the first inlet section and the second inlet section, the intermediate section including: a flange and an exhaust redirection section having a reduced cross-sectional flow path measured at a midpoint along a length of the flange that is less than the normalized cross-sectional area of flow of the first inlet flow passage.