A muffler for single-cylinder diesel engines with an integrated oxidation catalyst is provided, such that the muffler is connected to the cylinder head of the engine, that the muffler housing is divided into two chambers, that is, an inlet chamber and an outlet chamber, by means of an intermediate wall and that the oxidation catalyst is secured in the intermediate wall such that it fludically connects together both chambers.

A heat exchanger system for treatment of a flow of exhaust gases in an exhaust gas aftertreatment system of a vehicle. The heat exchanger system includes a nitrogen monoxide (NO) oxidation site for oxidizing nitrogen monoxide to nitrogen dioxide (NO2). The NO oxidation site is positioned such that the flow of exhaust gases at a downstream end (40) of the NO oxidation site in use of the heat exchanger system is arranged to proceed at a temperature within a predetermined temperature interval corresponding to a desired NO to NO2 (NO:NO2) ratio interval in the flow of exhaust gases. An exhaust gas aftertreatment system and a vehicle including such a heat exchanger system, and a method for using such a heat exchanger system, are also provided.

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 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).

An air exhausting device includes a muffler internally divided into a plurality of chambers by a separator, an inlet pipe that couples an exhaust pipe of an engine to the muffler, and an outlet pipe that is a path to discharge an exhaust gas inside the muffler to outside air. The muffler is configured of an expansion chamber to which a downstream end of the inlet pipe opens, and a resonator chamber communicated with only the expansion chamber via a plurality of resonator pipes. Any of or both of lengths and thicknesses of the plurality of resonator pipes are different.

An air exhausting device includes an inlet pipe that couples an exhaust pipe of an engine to a muffler, an outlet pipe that is a path to discharge an exhaust gas inside the muffler to outside air, and the muffler divided into a plurality of chambers by separators. The muffler is configured of a first expansion chamber, a second expansion chamber with which the outlet pipe is communicated, and a third expansion chamber. The inlet pipe is communicated with the first expansion chamber. The outlet pipe is communicated with the second expansion chamber. The first expansion chamber is adjacent to and communicated with the second expansion chamber via a first pipe. The second expansion chamber is communicated with the third expansion chamber via a second pipe. The first expansion chamber is communicated with the third expansion chamber via a third pipe.

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.

An exhaust gas aftertreatment device for an internal combustion engine comprises a housing, first and second catalytic substrates arranged inside the housing such that the first catalytic substrate is arranged upstream of the second catalytic substrate, and a reductant injector arranged in between the first and second catalytic substrates. Further, the first and second catalytic substrates are arranged such that a fluid flow direction through the exhaust gas aftertreatment device is angled. A flow redirecting wall is arranged downstream of the first catalytic substrate such that the fluid flow between the first and second catalytic substrates at least partially passes an outer circumference of the first catalytic substrate before reaching the second catalytic substrate. The redirecting wall is inclined to an outlet surface of the first catalytic substrate and the reductant injector is arranged at the redirecting wall at a position distant from the outlet surface.

An exhaust system of a work machine is equipped with a first exhaust system, a second exhaust system, and a third exhaust system. The first exhaust system and the third exhaust system are arranged to be in parallel with respective one ends directed in the same direction. In a plan view, the second exhaust system is arranged with the other end side directed in the same direction as the one end sides of the first exhaust system and the third exhaust system to be in parallel with the first exhaust system and the third exhaust system between the first exhaust system and the third exhaust system and, in a side view, is arranged above the first exhaust system and the third exhaust system.

An exhaust treatment apparatus (ATA) for reducing one or more components of the airstream directed through the ATA. The ATA includes an airstream inlet, an airstream outlet, and an airstream path directed through the ATA from the airstream inlet to the airstream outlet, and at least one corona/NTP generating region for altering a composition of an airstream. The ATA includes an outer enclosure forming one electrode surface and a second electrode surface positioned within and electrically insulated from the outer enclosure electrode surface, where an area between the outer enclosure electrode surface and the second electrode surface forms at least a part of the airstream path directed through the ATA. The second electrode surface includes a series of ridges directed towards the outer enclosure that encourage corona generation. A method is provided for using the ATA for treating an airstream, including an exhaust airstream from a combustion engine, as well as an exhaust airstream from a compression-ignition (diesel) engine.