Motor Vehicle Air Filter Element With Retaining Tab Cover Alignment
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Solution Overview
Problem
Existing air filter devices for motor vehicles face challenges in aligning and securing the cover properly over the filter element, leading to difficulties in installation and potential improper operation without the filter element in place, and the laterally protruding latching elements occupy valuable space.
Innovation Solution
A filter element with a retaining tab that projects beyond the narrow side of the front wall, which engages into a retaining recess on the housing, ensuring correct alignment and secure fixation, allowing only proper operation when the filter element is installed, and separate fastening elements for secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If latching means are arranged on the cover to latch onto receptacles on the housing, then the cover can be secured to the housing, but it becomes difficult to align and latch the cover properly, and the latching elements occupy valuable space
Solution Approach 1:
Instead of arranging latching means on the cover that latch onto receptacles on the housing, the patent inverts the arrangement by placing the latching means on the housing and the receptacles on the cover. This inversion simplifies the alignment process during cover installation and eliminates the need for complex alignment procedures while maintaining secure covering of the filter element
Solution Approach 2:
The patent moves the latching mechanism from a lateral arrangement (occupying horizontal space) to a vertical arrangement where the retaining tab extends downward from the filter element's front wall and engages with a retaining recess in the housing. This dimensional change eliminates lateral protrusions and optimizes space usage within the filter device
2Reliability
If latching means are arranged on the cover, then the cover can be secured to the housing, but the latching elements occupy valuable space inside the filter housing
Solution Approach 1:
The patent inverts the traditional latching arrangement by placing the active latching component (retaining tab) on the filter element rather than on the cover or housing. This allows the latching mechanism to be integrated into the filter element's front wall structure, eliminating the need for separate lateral latching elements that would occupy valuable space inside the filter housing
Solution Approach 2:
The retaining tab is merged with the front wall structure of the filter element, forming an integrated component rather than a separate latching element. This merging eliminates additional parts and reduces the overall space required for the latching mechanism, optimizing the volume available for filtering media
3Reliability
If the cover is designed to close the receiving space, then the filter element can be secured, but it is difficult to ensure the filter element is properly installed
Solution Approach 1:
The patent incorporates a retaining tab that extends beyond the front wall of the filter element before installation. This preliminary structural feature ensures that when the filter element is inserted into the housing, the retaining tab automatically engages with the retaining recess, providing built-in verification of proper installation without requiring additional complex verification mechanisms
Solution Approach 2:
The retaining tab and retaining recess arrangement creates a self-verifying installation system where the geometry of the components themselves provides the verification mechanism. The retaining tab can only engage properly when the filter element is correctly oriented and positioned, making improper installation physically impossible and eliminating the need for separate verification steps
Data Source
AI summary
The invention relates to a filter element (10) for an air filter device of a motor vehicle, having a frame which at least partially surrounds a filter material (18) of the filter element (10). The frame comprises a front wall (20) which extends perpendicularly to an insertion direction (22), in which the filter element (10) can be inserted into a receiving space (14) of a housing (12) of the air filter device. At least one fastening element (26) is arranged on a front side (24) of the front wall (20), onto which a cover of the air filter device designed to close the receiving space (14) can be fixed. A plate-shaped base body of the front wall (20) has a narrow side beyond which a retaining tab (76) of the filter element (10) formed separately from the at least one fastening element (26) projects. The filter element (10) can be secured against movement in or opposite to the insertion direction (22) by introducing the retaining tab (76) into a retaining recess (80) provided on the side of the housing (12) of the air filter device. The invention further relates to an air filter device having such a filter element (10).