Connector assembly, and/or motor-vehicle connector assembly, with at least one connector and at least one media line connected to the connector. The media line is electrically heated, a heat-conducting element being arranged in the transition region between connector and media line. The heat-conducting element extends with a first heat-conducting section into the media line and with a second heat-conducting section into the connector. By means of the electric heating of the media line, the heat-conducting element is heated, and/or indirectly heated, and in particular is heated and/or indirectly heated as far as the region of the connector.

Waveguide or flow guide surfaces can improve the efficiency of fluid flow through tubes or over surfaces. When incorporated in a tube, the waveguides improve flow and function as sound absorbers making them useful in engine mufflers, firearm silencer/suppressors and jet engine exhaust attenuators. On surfaces, the waveguides can reduce fluid drag and find use on projectiles (e.g., bullets), airfoils for aircraft, and land borne vehicles. The waveguide array in either a tubular chamber or on a surface comprises a plurality of successive wave-like undulations inclined generally in the direction of flow and when employed in tubes extending inwardly to permit an unobstructed path for the fluid gas from entry to exit. The waves define annular wave cavities between their successive inwardly extending edges and the wall of the chamber with each cavity having a cavity mouth open to the unobstructed path. The waveguides are sized and spaced so that gas vortices are created within the cavities when gas flow occurs which vortices create a fluid boundary layer that assists the gas flow.

Methods and systems are provided for a resonator of an exhaust system. In one example, the resonator is a quarter wave resonator with a diaphragm configured to provide pulsations during low-end engine torque conditions.

An exhaust muffler is made up of a plurality of layers including an exhaust passage pipe and expansion chambers, and includes a front assembly and a rear assembly sub-assembled separately from the front assembly. The front assembly includes a front exhaust passage pipe, a front muffler body disposed in covering relation to the outside of the front exhaust passage pipe and cooperating with the front exhaust passage pipe in making up double-walled pipes, and an exhaust valve disposed in the front exhaust passage pipe. The rear assembly includes a rear exhaust passage pipe and a rear muffler body disposed in covering relation to the outside of the rear exhaust passage pipe and cooperating with the rear exhaust passage pipe in making up double-walled pipes. There is thus provided an exhaust device for an internal combustion engine in which the accuracy of a position where the exhaust valve is installed is high.

The present inventive concept relates to a vehicle exhaust gas abatement apparatus. The vehicle exhaust gas abatement apparatus includes: an exhaust gas discharging unit having an exhaust gas discharging pass which is formed on one side thereof and along which an exhaust gas generated from an engine of a vehicle is discharged; a catalytic converter connected to a rear end of the exhaust gas discharging unit along a direction in which the exhaust gas is discharged and removing harmful components in the exhaust gas using a catalyst; and a surface combustion unit coupled to one side of the exhaust gas discharging unit and heating an inner portion of the exhaust gas discharging unit so that the exhaust gas is heated to an activation temperature or higher of the catalyst and then arrives at the catalytic converter.

A chemical heat storage device heats a subject to be heated existing in a pipe. The chemical heat storage device includes a reactor that generates heat by chemically reacting with a reaction medium, an absorber that causes an absorbent to absorb and stores the reaction medium, and a connection tube that is connected to the reactor and absorber, for the reaction medium to migrate through. The reactor includes a solid reaction material disposed along an outer peripheral surface of a place where the subject exists in the pipe and a casing that seals the reaction material so as to form a space along an outer peripheral surface of the reaction material. One end of the connection tube is open to the space.

An exhaust after-treatment assembly for an engine system is provided. The exhaust after-treatment assembly includes a housing having an inlet port, an outlet port, a catalyst disposed within a cavity defined by the housing, and a muffler assembly disposed within the cavity downstream of the catalyst. The muffler assembly includes one or more baffle plates disposed longitudinally spaced from one another within the housing to define at least a first resonator chamber and a second resonator chamber. Each of the baffle plates defines an openings aligned to one another about a longitudinal axis of the housing. Further, a resonator tube extends through the openings of the baffle plates and includes an inlet, a perforated portion and one or more outlet ports formed in a wall of the resonator tube. The perforated portion and the outlet ports, respectively in fluid communication with the second resonator chamber and the first resonator chamber.

An aftertreatment system (100) connected downstream an internal combustion engine arrangement (102) for receiving exhaust gases conveyed from the internal combustion engine arrangement (102) during operation thereof, wherein the aftertreatment system comprises first and second catalytic devices in series, wherein a gap is there between.

The present invention provides a highly durable, electrically heated catalytic converter including an inner tube on which an insulation layer is formed, wherein the insulation layer is less susceptible to damage such as cracking and peeling even when thermal stress occurs in a curvature section of the inner tube where the insulation layer is formed. The present invention provides an electrically heated catalytic converter for purifying exhaust gas, the electrically heated catalytic converter including a catalyst carrier supporting a catalyst and configured to generate heat by energization; a case for accommodating the catalyst carrier; and an electrical insulation mat interposed between the catalyst carrier and the case, wherein the case includes an outer tube disposed at the outermost side and an inner tube disposed inside the outer tube; in a cross section upstream of the catalyst carrier taken along a plane including the central axis of the case, the inner tube includes one or more curvature sections curved so as to outwardly project and extended sections connected to the one or more curvature sections, an insulation layer including an amorphous inorganic material is formed at least on an inner surface of the one or more curvature sections and the extended sections of the inner tube, the one or more curvature sections include a first curvature section located closest to the catalyst carrier, the first curvature section has a first curvature section insulation layer formed thereon, the first curvature section insulation layer having a thickness of 100 to 400 μm, the extended sections include a first extended section connected to the first curvature section and adjacent to the catalyst carrier, the first extended section has a first extended section insulation layer formed thereon, and the thickness of the first curvature section insulation layer is greater than 1 time to less than 1.4 times the thickness of the first extended section insulation layer.

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.