Coupling Head Filter Bypass for Compressed Air Flow
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Solution Overview
Problem
Existing coupling heads for commercial vehicles with filter elements face issues of partial blockage due to contaminated compressed air, leading to potential accidents from insufficient braking or the need for filter replacement, and existing solutions complicate manufacturing and assembly with pressure-controlled bypasses and non-standard sealing rings.
Innovation Solution
A coupling head design with a permanently open bypass that reduces the throttling effect when the filter element is not clogged, eliminating the need for pressure-controlled opening mechanisms and using a deflection system to separate contaminants from the bypass, allowing a majority of compressed air to flow through the filter element while accepting some contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter element is integrated into the coupling head to collect impurities, then the compressed air system is protected from contamination, but the filter element becomes partially blocked due to contaminated compressed air, leading to insufficient braking or requiring filter replacement
Solution Approach 1:
The flow path is segmented into two separate channels: a filtered path through the filter element and an unfiltered bypass path. This segmentation allows the system to maintain compressed air flow even when the filter element becomes blocked, as air can alternatively flow through the bypass channel, preventing complete flow interruption and maintaining braking functionality.
Solution Approach 2:
A bypass channel acts as an intermediary pathway that provides an alternative route for compressed air when the primary filtered path is obstructed. The bypass channel mediates between the blocked filter element and the compressed air system, ensuring continuous air supply for braking operations even when filtration is compromised.
2Productivity
If pressure-controlled bypass mechanisms are implemented to open bypass when filter is clogged, then the system maintains flow during filter blockage, but the manufacturing and assembly become complicated with additional components
Solution Approach 1:
The bypass channel is designed to be permanently open and self-regulating, requiring no active control mechanisms. When the filter element becomes blocked, the system automatically redirects flow through the bypass channel without requiring pressure sensors, control valves, or actuation mechanisms. The geometry of the bypass channel itself provides the flow regulation, eliminating the need for complex pressure-controlled opening mechanisms.
Solution Approach 2:
The control mechanism for the bypass is extracted entirely from the system. Instead of incorporating pressure-controlled valves, sensors, and actuation systems, the design removes these complex components and relies on the passive geometric configuration of the bypass channel to automatically manage flow when the filter is clogged.
3Device complexity
If a permanently open bypass is used to maintain flow, then the system remains simple and reliable, but contaminants may pass through the bypass and reach the compressed air system
Solution Approach 1:
The system dynamically adapts its filtration strategy based on operating conditions. When the filter element is clean, the majority of compressed air flows through the filtered path, providing optimal protection. When the filter becomes clogged, the system automatically shifts flow to the bypass path, accepting some contamination risk to maintain critical braking functionality. This dynamic flow distribution optimizes the balance between filtration and flow maintenance.
Solution Approach 2:
The system accepts partial contamination through the bypass as an acceptable trade-off to maintain full compressed air flow for braking operations. Rather than attempting to achieve complete filtration that would risk flow blockage, the design allows some level of contamination to pass through the bypass, ensuring that the critical braking function remains operational at all times.
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 design ensures a stable and efficient compressed air flow, reducing the risk of accidents and simplifying maintenance by maintaining a low level of contamination in the bypass and allowing easy filter replacement, while adhering to standardized sealing rings and reducing manufacturing costs.
Implementation Method 1
compressed air is deflected in such a way that contaminants are separated from the bypass opening
Data Source
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AI summary
The present invention relates to a coupling head (1) for coupling a towing vehicle to a trailer. According to the invention, a filter element (12) is used in the coupling head, which is bypassed by a permanently open bypass (51). Preferably, the path through the bypass (51) has at least one deflection in the area of an undercut (24). The deflection has the effect that impurities in the compressed air are not, or not completely, guided through the bypass (51). The bypass (51) can also ensure a compressed air supply, for example, to the trailer, if the filter element is at least partially blocked due to impurities. According to the invention, a valve element for opening the bypass (51) as the filter element (12) becomes increasingly clogged is unnecessary.