Particle Filter Ash Introduction via Combustible Carrier
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Solution Overview
Problem
Existing particle filters for vehicles, particularly in the initial life cycle, face challenges in achieving high filtration efficiency for both large and small particles, with existing methods being complex and costly to introduce ash into the filter body.
Innovation Solution
Introducing ash into the particle filter by combusting a carrier material with a non-combustible constituent arranged on the input side of the filter body, using materials like metal-bearing waste or metal-coated paper, which simplifies the process and ensures high filtration efficiency at the start of the filter's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brand-new particle filter is used in the initial phase, then the filter structure is simple and clean, but filtration efficiency for very small particles is poor because small particles are more likely to adhere to deposited particles than to clean filter material
Solution Approach 1:
The patent applies preliminary action by introducing an ash former into the particle filter before actual operation begins. The ash former is combusted during initial engine operation to deposit ash particles on the filter material, creating artificial soot layers that enhance filtration efficiency for very small particles from the start of service life
Solution Approach 2:
The patent changes the physical-chemical parameters of the filter material by depositing ash particles from the combusted ash former. This transformation converts clean filter material into filter material with artificial soot layers, fundamentally changing its interaction characteristics with very small particles
2Reliability
If existing methods are used to introduce ash into the filter body, then filtration efficiency can be improved, but the process becomes complex and costly
Solution Approach 1:
The patent merges the ash introduction process with the engine's normal operation by utilizing the existing combustion process. The ash former is simply introduced into the exhaust stream where it is combusted by the engine's exhaust gases, eliminating the need for separate ash introduction equipment or processes
Solution Approach 2:
The system uses the engine's own exhaust gases to combust the ash former and introduce ash into the filter. The exhaust stream provides both the combustion medium and the transport mechanism, making the system self-sufficient without external assistance
3Ease of manufacture
If the carrier material with non-combustible constituent is arranged on the input side of the filter body and combusted, then ash is introduced into the filter body in a simple and cost-effective manner, but requires engine operation to initiate combustion
Solution Approach 1:
The ash former is installed in the particle filter during manufacturing or assembly, before the vehicle is delivered to the customer. This preliminary placement ensures that the first engine operations automatically initiate the ash generation process without requiring any special procedures
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 method enhances filtration efficiency at the beginning of the particle filter's operation, reduces the need for extensive engine operation to minimize soot particle formation, and lowers costs associated with components and staffing, while ensuring low particle emissions during vehicle use.
Implementation Method 1
Combustion of the carrier material therefore leads to the production of a combustion residue of the ash former, namely ash
Implementation Method 2
particle filters are known from the prior art in which the filtration, in particular in a cell structure of the filter, is based on at least one or more of the effects referred to below: diffusion, interception, inertia separation, and screening
Implementation Method 3
very small particles are more likely to adhere to particles already deposited in the filter material than to the clean filter material of a brand-new particle filter
Data Source
AI summary
A method for operating a particle filter of a vehicle includes creating an ash to be introduced into a filter body of the particle filter by arranging a carrier material of an ash former on an input side of an end face of the filter body, as viewed in a flow direction of an exhaust gas through the particle filter, and combusting the carrier material, where a non-combustible constituent of the ash former is arranged on the carrier material. The created ash is then introduced into the filter body of the particle filter.