Exhaust Gas Mixer Assembly for Consistent Injector Alignment

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Solution Overview

Problem

Existing mixer arrangements for internal combustion engines do not ensure consistent functionality of the injector alignment in different installation positions, which is crucial for proper mixing of injection media with exhaust gas.

Innovation Solution

A mixer arrangement with complementary threaded hole patterns on the exhaust gas guide section and the injector, allowing for alignment consistency in two different installation positions by rotating the mixer arrangement around the injection axis, ensuring that cooling water lines are always directed upwards to prevent gas bubble formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the mixer arrangement is installed in different positions, then installation flexibility is improved, but injector alignment consistency deteriorates

Engineering Contradiction:

Improveinstallation position flexibilityVSAvoidinjector alignment consistency

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The mounting interface is segmented into two independent hole patterns: a first threaded hole pattern on the exhaust gas guide section and a second threaded hole pattern on the injector. This segmentation allows the exhaust gas guide section to be rotated independently around the injection axis, enabling different installation positions while maintaining reliable injector alignment through the complementary threading that ensures precise positioning regardless of rotational orientation.

Inventive Principle:

Principle #1Segmentation

2Reliability

If the cooling water lines are directed geodetically upwards, then gas bubble formation is prevented, but installation position flexibility deteriorates

Engineering Contradiction:

Improvegas bubble preventionVSAvoidinstallation position flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The system transitions from a fixed installation orientation to a dynamically adaptable one. The exhaust gas guide section can be rotated around the injection axis to different positions, and the complementary threaded hole patterns ensure that the injector maintains correct alignment in each position. This dynamic repositioning capability allows the cooling water lines to be directed upwards relative to the injector in any installation orientation, preventing gas bubble formation while maintaining installation flexibility.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12448910B2Mixer arrangement for mixing an injection medium injectable by an injector with the exhaust gas of an internal combustion engine

Publication Date: 2025.10.21 DEUTZ AG

AI summary

A mixer assembly, for mixing an injection medium with the exhaust gas of an internal combustion engine, including an exhaust gas guide portion having a first threaded hole pattern and an injector attachable to the exhaust gas guide portion and having a mounting hole pattern. The first threaded hole pattern is complementary to the mounting hole pattern. The exhaust gas guide portion has a second threaded hole pattern. The second threaded hole pattern is complementary to the mounting hole pattern.