A muffler comprising a hollow cavity enclosed by a first bottom surface, a second bottom surface and a side wall, the side wall connects the first bottom surface with the second bottom surface, an air inlet at one end of the hollow cavity and an air outlet at the other end of the hollow cavity; the cavity is divided into a plurality of chambers in an axial direction, the chambers comprise a first chamber adjacent to the first bottom surface, a second chamber adjacent to the second bottom surface and an intermediate chamber located between the first chamber and the second chamber, the air inlet is in gas communication with the intermediate chamber, and the air outlet is in gas communication with the first chamber.

An after treatment system (ATS) for a vehicle having an ATS module includes, fluidly connected in series, an inlet, a Diesel Oxidation Catalysts (DOC), a urea mixer and a Selective Catalytic Reduction (SCR), and an outlet. The inlet is fluidly connected to an output of an engine of the vehicle and the outlet is fluidly connected to an outlet tube of the vehicle. The inlet, DOC, mixer, SCR and outlet are arranged to define a substantial rectangular path of a flow (F) of exhaust gases flowing in the ATS, with the inlet and the outlet being positioned at a same vertex of the substantial rectangular path of the flow (F).

An internal combustion engine, exhaust system, exhaust gas/reactant mixing assembly unit includes an inlet area (14) of an exhaust gas flow duct (12) and a reactant release device (20) releasing reactant (R) into exhaust gas (A) flowing in the exhaust gas flow duct. The exhaust gas flow duct includes a mixing section (16) with a first mixing section segment (22) downstream of the reactant release device (20). An exhaust gas/reactant mixture flows in the first mixing section segment essentially in a main flow direction (H1)—from the reactant release device to a deflection area. A ring-shaped second mixing section segment (28) surrounds the first mixing section segment. The exhaust gas/reactant mixture flows in the second mixing section segment (28) in a second main flow direction (H2), essentially opposite the first main flow direction, from the deflection area (26) to an outlet area (34) of the exhaust gas flow duct (12).

A diesel exhaust treatment system for treating exhaust gas from a diesel engine comprising at least one diesel oxidation catalyst (DOC), at least one diesel particulate filter (DPF), at least one diesel exhaust fluid mixing chamber and at least one selective catalytic reduction converter (SCR). In one desirable embodiment, two DOCs, two DPFs, two SCRs, and two diesel exhaust fluid mixing chambers are arranged in parallel. The disclosed system is configured to reduce back pressure and increase urea vaporization while effectively using available space and providing improved access to components. The system can be coupled to a vehicle frame rail, such as the frame rail of a heavy duty truck.

A muffler for a vehicle includes: a case sealed at both ends by first and second side panels; first and second baffle plates installed in the case; a first chamber formed between the first side panel and the first baffle plate; a second chamber formed between the first baffle plate and the second baffle plate; a third chamber formed between the second baffle plate and the second side panel; an intake tube passing through the first side panel, and the first and second baffle plates, and including a first hole formed in a first body section located in the first chamber, and a second hole formed in a second body section located in the second chamber; and a pair of exhaust tubes passing through the first and second baffle plates, and the second side panel, and including a vent hole formed in body section located in the second chamber.

A vehicle exhaust device includes a muffler body that has an interior space divided into a plurality of expansion chambers by a partition wall, and an exhaust control valve that switches an exhaust passage in the muffler body. The exhaust passage includes a first exhaust passage and a second exhaust passage. The first exhaust passage connects an upstream end and a downstream end of the muffler body straight. The second exhaust passage passes through the plurality of expansion chambers via a connecting pipe that connects the plurality of expansion chambers. A center of the first exhaust passage is located above a center of the muffler body in a vehicle upper-lower direction, and the second exhaust passage is located below the first exhaust passage.

An exhaust system for the aftertreatment of exhaust gases of an internal combustion engine, having an annular catalytic converter which is flowed through by exhaust gas, wherein the annular catalytic converter has an inflow point and an outflow point and the annular catalytic converter has a tubular first flow path and an annular second flow path which are oriented concentrically with respect to one another and which are flowed through in series, wherein the first flow path is surrounded to the outside in a radial direction by the second flow path, wherein a pipe is led in the radial direction from the outside through the second flow path, wherein the pipe opens into the annular catalytic converter and the pipe has a radial extent at least as far as into the inner first flow path.

A vehicle exhaust system is provided. The exhaust system may include a muffler including a casing, an inlet tube extending therethrough, and an outlet pipe partially disposed therein. The exhaust system may also include an orifice tube that may have a tapered body inserted within an end of the outlet pipe that is disposed between a baffle and a wall of the casing. The orifice tube may also include an inlet portion flared from the tapered body configured to attenuate noise of exhaust gas funneling into the outlet pipe.

A muffler for use with an engine is provided. The muffler includes a first tube defining a first inlet and a first outlet spaced apart from the first inlet. The first tube is configured to receive exhaust at the first inlet. The muffler includes a second tube spaced apart from the first tube. The second tube defines a second inlet and a second outlet spaced apart from the second inlet. The second tube is configured to receive exhaust at the second inlet. The muffler includes a third tube disposed at least partly around the second tube. The third tube defines a third outlet spaced apart from each of the second inlet and the second outlet. The third outlet is in fluid communication with the second outlet of the second tube. The muffler also includes at least one outlet tube in fluid communication with the first outlet and the third outlet.

A muffler with ease discharge of condensate may include a housing formed of a cylinder shape and provided with an end plate at both end portions thereof, at least one baffle disposed in the housing to divide the internal space of housing into a plurality of chambers, an inlet pipe introducing exhaust gas in the housing, an outlet pipe discharging the exhaust gas from the housing the outside, so that the exhaust gas flowed into the inlet pipe flows through the chamber divided in the housing to be discharged through the outlet pipe, a condensate collecting tube disposed along the lower surface of the housing and provided with a passage in which the condensate gathered in the lower surface of the housing is introduced to be flowed and a condensate inducing tube connecting the condensate collecting tube and the outlet pipe.