Tenneco Gmbh

Other

Heinrich Gillet Gmbh (tenneco)

Joachim Gehrlein

Andreas Lang

Stefan Kohrs

Eric A Hein

Attila Kovacs

Sascha Haverkamp

Frank Terres

Gert Müller

Michael Wolf

Günter Palmer

Bertram Stelzer

Christoph Burg

Manfred Doll

Balthasar Hipp

Markus Jost

A mixer assembly comprises a tubular housing including an exhaust gas inlet, an exhaust gas outlet, and a reductant inlet on a side of the tubular housing. An upstream mixing element is positioned within the tubular housing upstream from the reductant inlet. A downstream mixing element is positioned within the tubular housing downstream from the reductant inlet and the upstream mixing element. The upstream and downstream mixing elements at least partially define a reductant receiving mixing chamber in which the injected reductant and exhaust gas mix. A divider is positioned within the tubular housing downstream from the upstream mixing element to split the exhaust into two divided flow streams prior to exiting through the exhaust gas outlet.

Mixer assembly

A mixer comprises a tubular housing defining a longitudinal axis along which exhaust gas flows. Injected reductant flows along an injection axis that extends at a non-parallel angle to the longitudinal axis. A first flow guide element extends across and blocks a portion of the tubular housing and includes a first aperture extending therethrough. The first flow guide element is positioned upstream from the reductant inlet such that exhaust gas flowing through the first aperture is impinged by the reductant. A second flow guide element is positioned downstream from the first flow guide element and fixed to the first flow guide element to define a mixing chamber in which injected reductant and exhaust gas mix. An intermediate wall is integrally formed with one of the first and second flow guide elements. The other of the first and second flow guide elements is fixed to the intermediate wall.

A mixer assembly for mixing an injected reductant with an exhaust gas comprises a tubular housing including a reductant inlet, an exhaust gas inlet and an exhaust gas outlet. The reductant inlet is positioned on a first side of the tubular housing and oriented to direct injected reductant along an injection access that extends transversely to a longitudinal axis. A first flow guide element is shaped as a sheet including a first aperture extending therethrough as well as a surface facing upstream. Exhaust gas flowing through the first aperture is impinged by the injected redundant. A second flow guide element is shaped as a sheet, positioned downstream from the first flow guide element and fixed to the first flow guide element to define a mixing chamber between the first flow guide element and the second flow guide element in which the injected redundant and the exhaust gas mix.

Mixing device

A mixing chamber for mixing an additive in an exhaust system of an internal combustion engine includes a housing, a flow-guiding element and a downstream substrate. The flow-guiding element is arranged within the housing between an inlet opening and an outlet opening. The flow-guiding element is tubular and forms a channel including a channel wall, one inlet and one outlet, via which all of the exhaust gas is guided through the channel to the outlet.

Exhaust system with mixer

A mixer assembly comprises a tubular housing including a reductant inlet, an exhaust gas inlet and an exhaust gas outlet. The tubular housing defines a longitudinal axis along which exhaust enters the housing. The reductant inlet is positioned on a first side of the tubular housing. An upstream element covers approximately one-half of the cross sectional area of the enhaust gas inlet and is positioned upstream of the reductant inlet. An upstream surface of the upstream mixing element directs exhaust gas flow transversly toward the reductant inlet. A downstream mixing element along with the upstream mixing element at least partially defines a reductant receiving duct in which injected reductant and exhaust gas mix.

A mix box for an exhaust system of an internal combustion engine, the mix box being used to incorporate additives into an exhaust gas flow and including at least one inlet tube, at least one outlet tube and a housing for accommodating the inlet tube and the outlet tube, wherein: the housing delimits a volume of the mix box in relation to the surroundings; the inlet tube has an inflow section located inside the housing, which inflow section is provided with at least one inflow opening for introducing the exhaust gas into the housing; the outlet tube has a metering device designed as an injection nozzle at the end of the outlet tube and has an outflow section located inside the housing, which outflow section has a length (La) and is provided with at least one outflow opening for discharging the exhaust gas from the housing; a flow zone is provided between the inlet tube and the outlet tube and the flow zone, over at least 30% of its length (La), is free of flow guiding elements which deflect the flow in a circumferential direction and which have an outer face and an inner face inside the volume.

Mix box

A mixing chamber for mixing an additive in an exhaust system of an internal combustion engine, having a single-part or multi-part housing which has an entry opening for exhaust gas having a flow cross-section and having a central entry axis, and which has, arranged downstream of the entry opening, an exit opening for exhaust gas having a flow cross-section and having a central exit axis. A flow-guiding element is arranged within the housing between the two openings, wherein the flow-guiding element is tubular and forms at least one channel having a channel axis, said channel having an inlet and having an outlet, via which the entire exhaust gas stream is guided, in a flow direction parallel to the channel axis, to the outlet having an outlet cross-section, and the flow direction deviates relative to the central exit axis by an angle a of between 20&#xb0; and 80&#xb0;. The mixing chamber is to be designed and arranged in such a way that, with a reduced overall length, an improved distribution of the mixture of exhaust gas and additive over the substrate surface is achieved and at the same time deposits of the additive are avoided. A downstream substrate is provided adjacent to the outlet in the direction of the central exit axis, the downstream substrate having a substrate cross-section that corresponds to the outlet cross-section.

Mixing chamber for mixing an additive in an exhaust system of an internal combustion engine

A mixer for an exhaust system of an internal combustion engine for mixing additives into an exhaust gas flow, with at least one inlet pipe having a pipe axis, with at least one outlet pipe having a pipe axis and with a housing for receiving the inlet pipe and the outlet pipe, wherein the outlet pipe has an inner part which is arranged within the housing and is provided with at least one outflow opening for the purpose of conducting the exhaust gas out of the housing, wherein the housing has a first housing part with a first housing edge and at least one second housing part with a second housing edge, wherein the two housing parts are at least partially connected via the housing edge, and in that the inlet pipe has an inner part which is arranged within the housing and is provided with at least one inlet opening for the purpose of introducing the exhaust gas into the housing, wherein a) the respective housing edge as at least two formations, each having a center axis, and/or b) the respective housing part has at least two rim holes, each having a center axis, and the respective pipe has bearing points via which said pipe is mounted within the formations or within the rim holes, wherein i) the respective pipe is formed symmetrically with respect to the design of the bearing points, and, for the purpose of installation, can be mounted in at least two different positions R, Rin the respective formation, or ii) the inlet pipe and the outlet pipe are of identical design with respect to the design of the bearing points, or iii) the two housing parts are connectable in a plurality of positions S, Srelative to each other via the housing edge.

Mixing pipe arrangement with housing

An exhaust-gas mixing pipe for admixing additive into an exhaust-gas stream of a combustion engine. The housing wall has multiple rows, arranged over a circumference U, of openings through which gas can flow into the interior of the pipe, wherein the at least one opening of a row forms in each case one stage M characterized according to its size by the average opening cross section Q of the openings, wherein the sum of all the opening cross sections Q of all the openings of all the rows of the exhaust-gas mixing pipe is equal to SQ. In that context, at least one first-order stage M, is provided, wherein stage Mhas openings having an average opening cross section Q. At least one second-order stage M, is provided, with openings having an average opening cross section Q, where Q&#x3e;=f Q, where 5&#x3c;=f&#x3c;=25.

Exhaust-gas mixer

The invention relates to a method for mixing an exhaust gas flow with a fluid in an exhaust gas pipeof an exhaust gas system, in which the fluid is injected by means of an injection deviceinto the exhaust gas pipe. The exhaust gas flow is guided in the exhaust gas pipein the area of the injection devicein a direction of flow S parallel to the exhaust gas pipe. The fluid is injected directly onto a deflection elementwhich is arranged in the exhaust gas pipein a central direction of injection E which deviates from the direction of flow S by an angle se, wherein by means of at least one sheet metal partwhich is provided on the deflection elementand which is raised at least partially at an angle sv with reference to the direction of flow S, the exhaust gas flow is diverted with reference to the direction of flow S from its direction of flow S into a central direction of distribution V. Before and after it impacts the deflection element, the fluid is carried along at least partially by the diverted part of the exhaust gas flow into the direction of distribution V and is diverted into the direction of distribution V by the raised sheet metal part

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Rheinzabern, Germany

Joachim Gehrlein