Crankcase Filter Detent Authorization Mechanism
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Solution Overview
Problem
Existing internal combustion engine crankcase ventilation filters lack a secure method to ensure only authorized replacement coalescer filter elements are used, which is crucial for maintaining the integrity of the coalescing filter function.
Innovation Solution
The implementation of complementary detents on both the filter element and the housing components, which only allow mating and thus proper installation when the detents interact in a keyed relation, preventing unauthorized filter elements from being used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional filter elements are used without authorization mechanisms, then installation is simple and easy, but the integrity and performance of the filter system cannot be ensured
Solution Approach 1:
The filter element and housing are designed with asymmetric complementary detents that only fit together in a specific orientation and configuration. This asymmetric design ensures that only the correct authorized filter element can be installed in the proper orientation, preventing improper installation while maintaining simple installation procedures for authorized elements.
Solution Approach 2:
Complementary detents serve as an intermediary mechanical feature between the filter element and housing. These detents act as a mediator that verifies the compatibility and proper installation of the filter element, ensuring system integrity without requiring complex electronic verification systems.
2Reliability
If authorization mechanisms are added to filter elements, then only authorized replacement elements can be used, but the device complexity increases
Solution Approach 1:
The authorization mechanism uses asymmetric detent features that are simple in form but effective in function. The complementary nature of these detents provides a reliable authorization system without requiring complex electronics, sensors, or verification systems, thus maintaining simplicity while ensuring only authorized elements are used.
Solution Approach 2:
The complementary detents perform dual functions: they provide the authorization verification and simultaneously serve as the mechanical connection and positioning features. This self-service approach eliminates the need for separate authorization verification mechanisms, reducing overall device complexity.
3Reliability
If detents are added to prevent unauthorized installation, then filter element authorization is ensured, but the manufacturing complexity increases
Solution Approach 1:
The asymmetric detent features are designed to be straightforward manufacturing elements that can be integrated into existing filter element and housing production processes. The complementary nature of these features allows for standard manufacturing techniques while ensuring proper authorization and fitment.
Solution Approach 2:
The authorization detents are merged with the existing structural and connection features of the filter element and housing. By combining the authorization function with the mechanical connection function, the manufacturing process does not require separate operations for creating authorization features, thus maintaining ease of manufacture.
Data Source
AI summary
A method is provided for servicing a filter, and structure is provided disabling assembly of the filter unless an authorized replacement filter element is used.