A method of reducing noise from a high-speed, including supersonic, jet, the method includes providing the high-speed or supersonic jet in a longitudinal flow direction; and inducing a rotation of a swirl layer of the high-speed or supersonic jet around a longitudinal direction of the jet and on the jet boundary so as to promote mixing of the high-speed or supersonic jet with surrounding air.

A method for causing exhaust gas flow to flow at least 270 degrees in a first direction about a perforated tube using a baffle plate having a main body with a plurality of flow-through openings and a plurality of louvers positioned adjacent to the flow-through openings. The method includes deflecting a first portion of the exhaust gas flow with the main body of the baffle plate. The method also includes allowing a second portion of the exhaust gas flow to flow through the flow-through openings of the baffle plate. The method also deflects the second portion of the exhaust gas flow at a downstream side of the main body with the louvers hereby causing the second portion of the exhaust gas flow to flow in the first direction about the perforated tube.

A heat recovery device comprises a valve body inwardly defining a direct flow path for exhaust gases from an inlet to an outlet, a heat exchanger comprising a flow passage for the exhaust gases emerging in an inlet zone of the valve body, and a gate positioned in the valve body. The heat recovery device comprises a guide wall positioned in the direct flow path at the inlet zone, arranged to guide the exhaust gases from the inlet toward the cutoff section away from the inlet zone when the gate frees the direct flow path, and delimiting at least one orifice to allow the exhaust gases to go to the inlet zone when the gate closes off the direct flow path.

In an exhaust gas processing device, an air-fuel ratio sensor is provided such that a measuring portion is located in a region surrounded by a downstream-side end surface of a TWC, an upstream-side end surface of a GPF, and an inner wall surface of a case against which the exhaust gas G that has passed through the TWC flows, that is the region a region on the GPF side of the center of the TWC.

The disclosure relates to a supercharged, direct-injection internal combustion engine having an intake system for the supply of charge air and having an exhaust-gas discharge system for the discharge of exhaust gas and having at least two series-connected exhaust-gas turbochargers which each comprise a turbine arranged in the exhaust-gas discharge system and a compressor arranged in the intake system and of which a first exhaust-gas turbocharger serves as a low-pressure stage and a second exhaust-gas turbocharger serves as a high-pressure stage, a first bypass line being provided which branches off from the exhaust-gas discharge system between the first turbine and the second turbine so as to form a first junction point.

The invention relates to a mixer for an exhaust gas system for mixing an additive into an exhaust gas flow of an internal combustion engine, having a first shell and at least a second shell which are arranged successively in the circumferential direction in relation to a center axis, each shell having at least two shell edges that are arranged offset in the circumferential direction and which each form a flow edge, wherein the flow edges of two circumferentially adjacent shell edges of two different shells delimit an inflow opening, such that at least one pipe end arranged coaxially with the center axis is provided with a circumferential pipe profile that has a nominal radius Rn and is used for connection to an exhaust pipe, the pipe end being formed by the circumferentially adjacent shells.

A reductant delivery system includes an inlet body, an outlet body, and an outer transfer tube. The inlet body includes an inlet body coupler, an inlet body outer transfer shell, and an inlet body inner shell. The inlet body coupler surrounds an inlet body inlet that is configured to receive exhaust gas. The inlet body outer transfer shell is coupled to the inlet body coupler. The inlet body outer transfer shell includes an inlet body outer transfer shell inner surface and an inlet body outer transfer shell outlet. The inlet body outer transfer shell outlet extends through the inlet body outer transfer shell inner surface. The inlet body inner shell includes an inlet body inner shell first flange, an inlet body inner shell second flange, and an inlet body inner shell wall. The inlet body inner shell first flange is coupled to the inlet body outer transfer shell inner surface.

A method for controlling exhaust flow in an EATS of a vehicle. A NO.sub.x sensor output parameter is monitored. It is determined that the NO.sub.x sensor output parameter is below a limit. When the NO.sub.x sensor output parameter is below the limit, it is determined that a first part of the exhaust flow should bypass at least a first area of the SCR unit and that a second part of the exhaust flow should be inputted to at least the first area of the SCR unit. It is initiated that the first part is bypassed and that the second part is inputted to at least the first area of the SCR unit. An amount of reductant that should be added to the second part of the exhaust flow is determined. Addition of the amount of reductant is initiated.

A static mixer for exhaust gas ducts of internal combustion engines includes an elongated hollow metal body having a shape which, relative to a symmetry axis, substantially corresponds to a solid of revolution defining at its inside a cavity having opposite bases, at least one of which has an axial opening, and a closed lateral wall connecting the opposite bases and having at least one radial opening over which a concave blade is arranged extending radially outward from a portion of the peripheral edge of the radial opening and surrounding a portion of the radial opening so as to define, in a first angular direction relative to the symmetry axis, a corresponding concave screen or spoon and, in a second, opposite direction, a mouth intended for the passage of gases and located substantially in front of the concave screen or spoon.

A segmented, heated urea mixer and an exhaust system to control NOx emission from combustion engines comprising a plurality of elements, at least one mixing element independently heatable by an external power source to a temperature above a temperature of another element. A method of using the exhaust gas mixer and an exhaust gas mixer system further comprising a controller is also disclosed.