Mixing arrangement for mixing liquid injection fluid injected into the exhaust gas of an internal combustion engine with the exhaust gas

The mixing arrangement with a divided mixing chamber and vortex flow generation effectively addresses the inefficiencies in converting and mixing liquid injection fluids with exhaust gas, ensuring efficient catalytic reactions and preventing deposits.

DE102024135754A1Pending Publication Date: 2026-06-03PUREM GMBH
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
PUREM GMBH
Filing Date
2024-12-03
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Existing injection systems for internal combustion engines face challenges in efficiently converting liquid injection fluids into a gaseous state and achieving uniform mixing with exhaust gas due to varying boiling points and inhomogeneous mixing, leading to inefficient catalytic reactions and potential deposits.

Method used

A mixing arrangement with a divided mixing chamber and vortex flow generation through offset inlet and outlet openings, ensuring prolonged contact time and uniform distribution of the injection fluid, preventing deposits by generating helical flows.

Benefits of technology

Ensures efficient conversion of liquid injection fluids into a gaseous state and uniform mixing with exhaust gas, preventing deposits and enhancing catalytic reactions by maintaining a long residence time and promoting heat absorption.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

In a mixing arrangement for mixing an injection agent (R) injected into the exhaust gas (A) of an internal combustion engine with the exhaust gas (A), a mixing chamber (26) formed in a mixing chamber assembly (20) has a first mixing chamber sub-area (28) bounded by the upstream mixing chamber assembly wall (22) and the downstream mixing chamber assembly wall (24) and a second mixing chamber sub-area (30) bounded by the upstream mixing chamber assembly wall (22) and the downstream mixing chamber assembly wall (24). An injection agent delivery unit (42) is arranged for delivering an injection agent (R) into a mixing chamber boundary area (27). In association with the first mixing chamber sub-area (28), at least one first inlet opening (44) is provided in the upstream mixing chamber assembly wall (22) and at least one first outlet opening (48) is provided in the downstream mixing chamber assembly wall (24).In association with the second mixing chamber section (30), at least one second inlet opening (46) is provided in the upstream mixing chamber assembly wall (22) and at least one second outlet opening (50) is provided in the downstream mixing chamber assembly wall (24). In the first mixing chamber section (28), the at least one first inlet opening (44) and the at least one first outlet opening (48) are arranged offset from each other in the first direction (R1) and / or in the second direction (R2). In the second mixing chamber section (30), the at least one second inlet opening (46) and the at least one second outlet opening (50) are arranged offset from each other in the first direction (R1) and / or in the second direction (R2).
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