Particle Filter Inner Casing Axial Displacement Mechanism
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Solution Overview
Problem
Existing particle filters for exhaust gases from internal combustion engines face challenges in easy assembly and replacement of the filter element, leading to wear and tear, reduced efficiency, and potential failure, due to particle deposition which cannot be fully regenerated.
Innovation Solution
The particle filter design features an inner casing that is axially displaceable within an outer casing, supported by radial bearings and compressive force transmission via a ring and support elements, allowing for simple installation and replacement of the filter element, along with radial sealing elements to maintain tightness and prevent gas leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter element is fixed in the housing, then the particle filter maintains structural stability, but the assembly and replacement of the filter element become complex and difficult
Solution Approach 1:
The particle filter is divided into separate functional modules: the housing (with fixed outer casing), the filter element, and the inner casing (with movable inner shell). This segmentation allows the inner casing to be independently displaced for filter element replacement while the housing remains structurally stable, resolving the contradiction between stability and ease of maintenance.
Solution Approach 2:
The inner casing is designed with axial displacability relative to the outer casing, transforming a static structure into a dynamic one. This allows the inner casing to move for filter element replacement and then return to its original position, providing both structural stability during operation and ease of maintenance during replacement.
2Strength
If the filter element is fixed in the housing, then the particle filter maintains structural integrity, but the replacement effort increases significantly
Solution Approach 1:
By separating the housing into fixed outer casing and movable inner casing, the system allows the filter element to be accessed and replaced by simply displacing the inner casing axially, significantly reducing replacement effort while maintaining overall structural integrity through the robust housing design.
Solution Approach 2:
The inner casing acts as an intermediary component between the filter element and the outer housing. It provides a movable interface that facilitates filter element replacement while the outer housing maintains structural integrity, effectively mediating between the needs for strength and ease of repair.
3Reliability
If radial sealing elements are added between inner and outer casings, then the tightness of the housing is improved, but the device complexity increases
Solution Approach 1:
Radial sealing elements in the form of flexible sealing rings or lips are installed at the interface between the inner and outer casings. These flexible sealing elements prevent exhaust gas leakage while maintaining a relatively simple overall structure, as they can be integrated into the existing casing design without requiring complex additional components.
Data Source
Figure 1
Figure 2a~2b
Figure 2c~2d
AI summary
The invention relates to a particle filter (2) for filtering exhaust gas in an internal combustion engine, in particular of a motor vehicle, comprising a housing and a filter element (5). Simplified installation and/or simplified replacement of the filter element (5) and/or improved sealing of the housing (4) results if the filter element (5) is supported in an inner jacket (9), which is supported radially in an outer jacket (12) and is arranged so as to be axially movable in the outer jacket (12), wherein the inner jacket (9) is axially supported on a ring (24), which is supported axially on a cover (22) that closes an installation opening (20) of the housing (4) by means of at least one supporting element (25) in order to transmit pressure forces. The invention further relates to a muffler (1) having such a particle filter (2), wherein a section of a muffler housing (3) of the muffler (1) forms the housing (4) of the particle filter (2).