Exhaust Component Cleaning via X-Ray Inspection
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Solution Overview
Problem
Conventional exhaust aftertreatment component cleaning and requalification processes lack the use of logic to determine the appropriate cleaning method and do not utilize computer-processed x-rays to guide the cleaning process, leading to inefficiencies in removing particulate matter from diesel particulate filters (DPFs).
Innovation Solution
A method that uses x-ray processing techniques to inspect components and associate specific cleaning techniques with material compositions, including dry cleaning, wet washing, and high-temperature regeneration, based on ash accumulation and absorption thresholds, to determine the most effective cleaning approach for each component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional cleaning processes are used without logic or x-ray guidance, then the cleaning process is simple and quick, but the cleaning effectiveness is insufficient and inefficient
Solution Approach 1:
The patent implements feedback by using x-ray inspection results to guide the cleaning process. The system inspects the DPF with x-rays, analyzes the particulate matter composition and distribution, and then selects the appropriate cleaning method (pneumatic, fluidic, or combination) based on the inspection findings. This closed-loop approach ensures cleaning effectiveness while optimizing the process.
Solution Approach 2:
The patent applies dynamics by making the cleaning process adaptive rather than static. The cleaning method is dynamically selected based on the actual condition of the DPF as detected by x-ray inspection. The system can switch between different cleaning modes (pneumatic only, fluidic only, or both) depending on the particulate matter type, distribution, and accumulation patterns observed during inspection.
2Adaptability or versatility
If only one cleaning method is used per DPF, then the process is simple, but it cannot optimize for different material compositions and ash accumulation patterns
Solution Approach 1:
The patent applies local quality by tailoring the cleaning approach to the specific conditions detected in different regions of the DPF. The x-ray inspection identifies local variations in particulate matter composition, ash accumulation patterns, and plug formation at different locations within the filter. The cleaning process is then localized to address these specific conditions, using pneumatic cleaning for certain regions and fluidic cleaning for others based on the detected characteristics.
Solution Approach 2:
The patent utilizes parameter changes by adjusting cleaning parameters based on detected conditions. The system changes parameters such as cleaning method selection, temperature, pressure, and fluid type based on the x-ray analysis of particulate matter composition, ash content, and accumulation patterns. This allows optimization of cleaning effectiveness for different material compositions and accumulation scenarios.
3Measurement precision
If visual inspection is used for requalification, then the inspection process is simple and fast, but it cannot detect internal ash accumulation or composition details
Solution Approach 1:
The patent replaces the mechanical/visual inspection system with an x-ray-based inspection system. Instead of relying on visual inspection that cannot penetrate the filter media, the system uses x-ray technology to image the internal structure, ash accumulation, and particulate matter distribution within the DPF. This substitution enables precise detection of internal conditions that are invisible to visual inspection.
Solution Approach 2:
The patent introduces x-ray technology as an intermediary between the inspection system and the DPF internal structure. The x-ray beams penetrate the filter media and interact with the ash and particulate matter, providing detailed information about composition, distribution, and accumulation patterns. This intermediary enables non-contact, non-invasive inspection of the internal conditions that would otherwise be inaccessible.
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 approach ensures thorough cleaning and requalification of exhaust aftertreatment components by tailoring the cleaning process to the specific composition and condition of the component, improving the effectiveness and efficiency of the cleaning and requalification process.
Implementation Method 1
inspecting the component using an x-ray processing technique
Data Source
AI summary
According to one embodiment, a method for cleaning and requalifying a component of an exhaust aftertreatment system includes inspecting the component using an x-ray processing technique. The method further includes associating the plurality of cleaning techniques with a plurality of compositions of material, and cleaning the component according to at least one of the plurality of cleaning techniques associated with the composition of material.