Integrated Exhaust Pipe Mixing Device for Educt Evaporation
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Solution Overview
Problem
Existing exhaust systems for internal combustion engines require separate components for mixing and evaporation devices, leading to increased costs and complexity in manufacturing and assembly.
Innovation Solution
Integration of the mixing and/or evaporation device directly into the end section of an exhaust pipe, which is manufactured as a single unit, eliminating the need for additional components and assembly steps, and utilizing baffles formed through cutting and bending of the pipe's wall sections to enhance mixing and evaporation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate mixing and evaporation devices are used in the exhaust line, then the mixing and evaporation functions are provided, but the device complexity and manufacturing cost increase
Solution Approach 1:
The mixing device and evaporation device are merged into a single integrated component that is inserted into the exhaust line. This combines multiple functions (mixing of exhaust gas with injected substance, and evaporation of the injected substance) into one device, reducing the total number of components from multiple separate devices to a single integrated unit, thereby simplifying the exhaust system structure and reducing manufacturing complexity
2Ease of manufacture
If multiple separate components are assembled to form the exhaust line, then the exhaust line can be constructed, but the assembly complexity and labor costs increase
Solution Approach 1:
The mixing device and evaporation device are combined into a single integrated component that can be inserted into the exhaust line as one piece. This eliminates the need for multiple separate assembly steps to install mixing devices, evaporation devices, and other components individually, thereby simplifying the overall assembly process and reducing labor costs
3Manufacturing precision
If the exhaust pipe protrudes into nearby pipes or housings, then integration is possible, but the manufacturing precision requirements increase
Solution Approach 1:
The integrated mixing and evaporation device is designed to be inserted into the exhaust line, with the exhaust pipe protruding into nearby pipes or housings. This nesting arrangement allows the device to be positioned accurately within the exhaust system, utilizing the existing spatial relationships between components to achieve proper alignment and integration without requiring excessively high manufacturing precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This integration reduces material and labor costs, simplifies the manufacturing process, and improves the homogenization of exhaust gas and educt mixtures, enhancing the efficiency of exhaust gas treatment processes.
Implementation Method 1
the baffles and thus the mixing and/or evaporation devices can be created inexpensively out of the exhaust pipe that has already been manufactured previously... These may then be shaped through a corresponding bending deformation so that they can induce turbulence in the exhaust flow passing through the exhaust pipe
Implementation Method 2
extensive evaporation is desirable... an injection device for injecting a liquid educt into the exhaust line
Implementation Method 3
heat can thereby be introduced into the exhaust line
Data Source
AI summary
An exhaust system for an internal combustion engine, includes an exhaust line, an exhaust gas treatment device, an injection device arranged upstream from the exhaust gas treatment device for injecting a liquid educt into the exhaust line and a mixing and/or evaporation device for the sprayed educt situated downstream from the injection device and upstream from the exhaust gas treatment device. At least one section of the exhaust line carrying exhaust gas is formed by an exhaust pipe that has an end section arranged downstream from the injection device and upstream from the exhaust gas treatment device. The mixing and/or evaporation device is integrally formed on the end section of the exhaust pipe.