Purem GmbH

In a mixing arrangement for mixing injection agent injected into exhaust gas of an internal combustion engine with the exhaust gas, a mixing chamber has a first sub-region delimited by the upstream wall and the downstream wall, and a second sub-region delimited by the upstream wall and the downstream wall. A first inlet is provided in the upstream wall and an outlet is provided in the downstream wall so as to be assigned to the first sub-region. A second inlet opening is in the upstream wall and at least one second outlet opening is in the downstream wall so as to be assigned to the second sub-region. In the first sub-region the first inlet and the first outlet are disposed mutually offset in the first or/and the second direction. In the second sub-region the second inlet and the second outlet are disposed mutually offset in the first or/and second direction.

A mixing section for an exhaust system of a combustion engine includes a mixing section housing, wherethrough exhaust gas can flow. A tubular mixing body is arranged in the housing and extends in the direction of a mixing body longitudinal axis. The mixing body delimits a first flow volume radially with respect to the outside and a second flow volume radially with respect to the inside. The mixing body includes a tubular first body part and, on an outer side of the first body part, includes a tubular second body part. The mixing body is supported radially with respect to the housing via a plurality of first radial support members in a first radial support region. The first body part is supported radially on the housing by the first radial support members, and the second body part is supported radially on the housing by second radial support members.

An exhaust gas system for an internal combustion engine includes an exhaust gas treatment unit, an exhaust gas guide conducting exhaust gas to the exhaust gas treatment unit and a reactant discharge unit for the discharge of reactant into the exhaust gas guide. The exhaust gas guide includes an outer pipe and an inner pipe in a longitudinal region between the reactant discharge unit and the exhaust gas treatment unit. An external volume through which exhaust gas can flow and an internal volume through which exhaust gas can flow in the inner pipe are provided.

An exhaust-gas treatment module for an exhaust system of an internal combustion engine has a plurality of elements which follow one another in an exhaust-gas flow direction. The elements include a first mixing path with a first reactant dispensing arrangement in an upstream end region of the first mixing path and with a first mixing channel which is elongate in the direction of a first mixing path longitudinal axis. A first exhaust-gas treatment arrangement follows and is elongate in the direction of a first exhaust-gas treatment arrangement longitudinal axis and has an upstream end region connected to a downstream end region of the first mixing path, a second mixing path with a second reactant dispensing arrangement in an upstream end region which is connected to a downstream end region of the first exhaust-gas treatment arrangement.

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.

An exhaust-gas treatment module for an exhaust system of an internal combustion engine has a plurality of elements which follow one another in an exhaust-gas flow direction. The elements include a first mixing path with a first reactant dispensing arrangement in an upstream end region of the first mixing path and with a first mixing channel which is elongate in the direction of a first mixing path longitudinal axis. A first exhaust-gas treatment arrangement follows and is elongate in the direction of a first exhaust-gas treatment arrangement longitudinal axis and has an upstream end region connected to a downstream end region of the first mixing path, a second mixing path with a second reactant dispensing arrangement in an upstream end region which is connected to a downstream end region of the first exhaust-gas treatment arrangement.

A mixer assembly unit, for an exhaust system exhaust gas treatment unit of an internal combustion engine, mixes exhaust gas discharged by the internal combustion engine with reactant. A mixing section ( 12 ), downstream in relation to a reactant release device ( 14 ), mixes exhaust gas, flowing in an exhaust gas flow direction, with reactant. The mixing section includes a core flow duct ( 34 ), extending in a direction of a mixing section longitudinal axis (L), through which a first exhaust gas partial stream (T 1 ) flows. A second exhaust gas partial stream (T 2 ) flows through a jacket flow duct ( 36 ) surrounding the core flow duct and separated from the core flow duct by an inner wall ( 30 ). The reactant release device releases reactant into the core flow duct or/and into the first exhaust gas partial stream. A mixer ( 38 ) is provided at an upstream end area ( 22 ) of the mixing section.

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.

An internal combustion engine exhaust system mixer device includes a bottom element ( 12 ) includes a downstream rear side ( 22 ) and a front side ( 44 ). The bottom element has a reactant introduction opening ( 31 ), open to a reactant receiving volume ( 46 ), and expands therefrom radially from the reactant introduction opening toward the front side. Exhaust gas passage ducts ( 58 ), arranged following one another in the circumferential direction about the opening axis (A), open to the reactant receiving volume. A swirl generation element ( 20 ) is connected to the bottom element and encloses the opening axis. A mixing volume ( 64 ) adjoins the reactant receiving volume in the direction of the opening axis and is formed in the swirl generation element. A plurality of exhaust gas passage openings ( 66 ), following one another in the circumferential direction, about the opening axis are provided in the swirl generation element.

A mixer device for an exhaust system of an internal combustion engine includes a tubular carrier ( 30 ) enclosing a mixer longitudinal axis (A) in a ring shape configuration and a mixer insert ( 28 ) carried at the carrier ( 30 ). The mixer insert ( 28 ) has a plurality of connection attachments ( 52, 54, 56 ) located at spaced locations from one another in relation to the mixer longitudinal axis (A) radially on the outside. The carrier ( 30 ) has a plurality of connection recesses ( 60, 62 ) for the permanent connection of the mixer insert ( 28 ) to the carrier ( 30 ).