An exhaust gas/reactant mixing arrangement is for an exhaust system of an internal combustion engine for mixing exhaust gas and reactant. The mixing arrangement includes an exhaust gas guide housing extending in the direction of a housing longitudinal axis and a housing wall. The housing wall surrounds and defines an exhaust gas duct accommodating a flow of exhaust gas. A mixing zone is formed between an upstream end wall and a downstream end wall arranged downstream of the upstream end wall. The mixing zone includes a first chamber and a second chamber as well as a reactant dispensing unit carried on the exhaust gas guide housing for dispensing reactant into the first chamber in a reactant main dispensing direction oriented substantially along a reactant dispensing line.

A mixer assembly for a vehicle exhaust system includes a mixer shell defining an internal cavity, wherein the mixer shell includes an upstream end configured to receive exhaust gases and downstream end, and a reactor positioned within the internal cavity. The reactor has a reactor inlet configured to receive injected fluid and a reactor outlet that directs a mixture of exhaust gas and injected fluid into the internal cavity. An inlet baffle is mounted to the upstream end of the mixer shell. The inlet baffle includes at least one opening that directs exhaust gas into at least one exhaust gas inlet to the reactor and a plurality of bypass openings that direct exhaust gas to bypass entry into the reactor. The inlet baffle includes a crowned portion that curves away from the reactor to provide for an increased open area within the internal cavity between the inlet baffle and the reactor.

An after treatment system (ATS) for a vehicle includes, fluidly connected in series, an inlet, a urea mixer 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 urea mixer is provided with a dosing module, an inner element and an outer element. The inner element is configured such that a first flow of exhaust gas flow flowing from the inlet into the urea mixer flows into an first volume defined by the inner element. The outer element is configured such that a second flow flows in a volume defined between inner element and outer element, wherein the first and second flows rejoin together in a mixing chamber fluidly connected to the volume and to the first volume downstream with respect inner and outer elements.

The present disclosure relates to an apparatus for adding a liquid reducing agent, preferably an aqueous urea solution, to the exhaust gas from an internal combustion engine. The apparatus according to the present disclosure comprises a dosing device arranged in an exhaust line of the internal combustion engine, which device is designed to generate a reducing agent spray by means of an injector. The apparatus furthermore comprises a swirl generator device, designed as a hollow body, preferably a hollow cylinder, about a longitudinal axis, which has a first end facing the injector and a second end facing away from the injector. The shell surface L of the swirl generator device, designed as a hollow body, furthermore comprises at least one exhaust inlet opening extending substantially in the longitudinal direction and a guide element, attached adjacent to the exhaust inlet opening and covering the exhaust inlet opening in the interior of the swirl generator device, at least in part at a distance, for deflecting an exhaust gas flow. According to the present disclosure, the guide element is closed in the direction of the first end of the swirl generator device, by means of a wall or connection to the shell surface, for example, and open in the direction of the second end of the swirl generator device. The present disclosure furthermore relates to a motor vehicle, preferably a utility vehicle, having a corresponding apparatus.

A mixing assembly for an exhaust system can include an outer body, a front plate, a back plate, a middle member, and an inner member. The outer body defines an interior volume and has a center axis. The front plate defines an upstream portion of the interior volume and the back plate defines a downstream portion of the interior volume. The middle member is positioned transverse to the center axis and defines a volume. The inner member is positioned coaxially with the middle member inside the middle member. The front plate includes inlets configured to direct exhaust to (i) a first flow path into an interior of the inner member, (ii) a second flow path into the volume of the middle member between a sidewall of the middle member and a sidewall of the inner member, and (iii) a third flow path into the interior volume of the outer body.

A mixer, a mixer assembly and a mixing method in which the mixer comprises a shell defining a first space, the first space receives engine exhaust, and the shell has a mounting area located on a wall of the shell; a doser mounting base arranged in the mounting area for mounting the doser, wherein the doser mounting base comprises a spray inlet as an inlet end for the spray that is sprayed by the doser entering the first space, and the doser mounting base further comprises a first swirl structure that surrounds the spray inlet to make the exhaust form a swirl around the spray inlet.

A system, method, and apparatus for oxygenation of a source of water, to increase the dissolved oxygen content of water. Aspects of the present invention harnesses and directs the power of water flowing through the system to extract oxygen present in air, rather than relying on the injection of gas or using other mechanical means. The water oxygenator is formed as an elongate cylindrical tube having a water inlet at a first end, a water outlet at a second end, and an air inlet proximal to the first end. The elongate cylindrical tube has an outer sidewall defining a mixing chamber within an interior cavity of the water oxygenator. The mixing chamber includes a plurality of baffles that are disposed in a spaced apart relation along a longitudinal length of the interior cavity.

Dosing and mixing exhaust gas includes directing exhaust gas towards a periphery of a mixing tube that is configured to direct the exhaust gas to flow around and through the mixing tube to effectively mix and dose exhaust gas within a relatively small area. Some mixing tubes include a slotted region and a non-slotted region. Some mixing tubes include a louvered region and a non-louvered region. Some mixing tubes are offset within a mixing region of a housing.

A mixing conduit for use within an exhaust treatment system of a work vehicle. The mixing conduit is configured to receive engine exhaust and a mixture of engine exhaust and reductant. The mixing conduit includes an outer tube and an inner tube within the outer tube. Each tube extends lengthwise from upstream ends to downstream ends of the inner and outer tubes, respectively. The inner tube includes an exterior surface, and the outer tube includes an interior surface. The inner tube defines an inner flowpath within the inner tube. The outer tube and inner tube also define an outer flowpath radially between the exterior surface of the inner tube and the interior surface of the outer tube. The mixing conduit further includes one or more swirler vanes extending radially between the exterior surface of the inner tube and the interior surface of the outer tube and within the outer flowpath.

Various examples of systems and methods for making microspheres, microparticles, and emulsions are provided. In one example, a system and method for forming microspheres comprises: pumping a dispersed phase liquid and a continuous phase liquid into a levitating magnetic impeller pump to subject the dispersed phase liquid and continuous phase liquid to a high shear environment within the impeller pump's pump chamber. In another example, a system and method for forming an emulsion comprises: pumping a dispersed phase liquid and an inner aqueous phase liquid into a levitating magnetic impeller pump to subject the dispersed phase and the inner aqueous phase to a high shear environment within the impeller pump's pump chamber.