Removable Lid Filter Device with V-Clamp Fixation
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Solution Overview
Problem
Existing end-out service filter devices for combustion engine exhaust after-treatment systems face challenges in maintaining insulation integrity, minimizing physical space, preventing particulate matter bypass, and ensuring leak tightness during filter removal and replacement, especially when servicing particulate filters like DPFs and GPFs.
Innovation Solution
An end-out service filter device design featuring a removable lid with V-clamp fixation, a support ring for axial alignment, and insulation to maintain leak tightness, allowing for easy removal and replacement of filters while minimizing bypass risks and accommodating various filter sizes and types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If end-out service filter device is designed with removable lid and V-clamp fixation, then ease of filter removal and replacement is improved, but device complexity increases
Solution Approach 1:
The filter device is divided into separable components: a removable lid with V-clamp fixation, a support ring, and the filter unit itself. This segmentation allows the lid to be independently removed for filter servicing while maintaining the structural integrity of the remaining components, directly enabling easy filter removal and replacement.
Solution Approach 2:
The V-clamp acts as an intermediary mechanism between the lid and the filter unit, providing a simple yet effective fixation system. The V-clamp engages with the support ring to secure the lid in place during operation, and can be easily released to remove the lid, balancing security with ease of access.
2Reliability
If insulation is added to maintain leak tightness, then reliability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
A flexible gasket is introduced as a thin film element between the lid and the filter unit housing. This gasket deforms to conform to the mating surfaces, ensuring leak-tight sealing without requiring complex rigid insulation structures. The flexible nature of the gasket allows it to accommodate minor dimensional variations while maintaining seal integrity.
Solution Approach 2:
The sealing function is extracted from the main structural components and assigned to a dedicated gasket element. This separates the sealing requirement from the mechanical structure, allowing the gasket to be optimized independently for sealing performance while the lid and housing focus on structural integrity and ease of removal.
3Manufacturing precision
If support ring is added for axial alignment, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The support ring creates a circular reference surface that provides uniform axial alignment for the filter unit regardless of its position during installation. This equipotential reference ensures that the filter unit is correctly positioned along the axial direction, facilitating precise alignment without requiring complex positioning mechanisms.
Solution Approach 2:
The support ring serves as an intermediary alignment element between the lid and the filter unit. It provides a stable reference surface that mediates the alignment process, ensuring that the filter unit is correctly positioned axially before the V-clamp secures the lid in place.
4Ease of operation
If service opening is provided for filter access, then ease of operation is improved, but risk of particulate matter bypass increases
Solution Approach 1:
The service opening is segmented and controlled by the removable lid that can be securely closed during operation. When the lid is closed and sealed, the service opening is blocked, preventing particulate matter bypass. When the lid is removed for maintenance, the service opening is accessible for filter servicing.
Solution Approach 2:
The V-clamp acts as an intermediary locking mechanism that secures the lid in the closed position during operation. This intermediary device ensures that the service opening remains blocked and prevents particulate matter from bypassing the filter, while still allowing easy removal when maintenance is required.
Data Source
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AI summary
The present invention relates to an end-out service filter device for an exhaust after- treatment system of a combustion engine comprising a removable filter unit attached to a filter unit housing via filter unit fixing means, a flow transfer device which comprises a main flow deflecting wall configured to deflect exhaust gases of the combustion engine exiting or entering the filter unit, wherein the flow deflecting wall comprises a removable lid attached to said main flow deflecting wall via lid fixing means, said removable lid closing a service opening facing said filter unit for removing and/or inserting said filter unit through said service opening. The present invention also relates to a method of servicing said end-out service filter device and to an after-treatment system of the exhaust gases of a combustion engine comprising said end-out service filter device.