Solenoid Valve Coupling Geometry to Prevent Pneumatic Misassembly
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Solution Overview
Problem
Human errors in installing solenoids of different variants in pneumatic systems, such as brake control and air suspension systems, lead to costly scrap and rework due to incorrect mounting, as variants like 2/2 and 3/2 directional valves can be easily confused.
Innovation Solution
A pneumatic device with a coupling section designed for a specific type of solenoid valve using a form-fit design, ensuring only the correct type can be mounted, and incorporating asymmetrical shapes and recesses to guarantee correct orientation and positioning, preventing incorrect mounting and facilitating end-of-line testing for correct functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If solenoid valves of different variants are mounted on a pneumatic device, then the pneumatic system can perform multiple functions, but human errors lead to incorrect mounting and costly rework
Solution Approach 1:
The coupling section is designed with an asymmetrical shape that does not match the symmetrical or differently oriented coupling counterpart sections of incorrect solenoid valve variants. This asymmetry ensures that only the correct solenoid valve type can be physically mounted in the correct orientation, preventing human error in mounting while still allowing multiple valve types to be supported through different coupling section designs
2Adaptability or versatility
If multiple variants of solenoid valves are used in the pneumatic system, then system functionality is enhanced, but the complexity of ensuring correct installation increases
Solution Approach 1:
Each coupling section is designed with specific local qualities - unique asymmetrical shapes, orientations, and geometric features - that correspond to specific solenoid valve variants. This localized differentiation at each mounting position allows the system to support multiple valve types while simplifying the installation process, as workers can visually identify the correct match without complex procedures
3Ease of manufacture
If solenoid valves with similar exterior shapes are used, then standardization is achieved, but it becomes difficult to distinguish between different variants during installation
Solution Approach 1:
While the solenoid valves themselves may have similar exterior shapes for standardization, their coupling counterpart sections are designed with distinct asymmetrical features - different orientations, shapes, or geometric characteristics. This allows standardized valve bodies to be manufactured while providing clear visual and physical differentiation at the coupling interface, making it easy to identify and mount the correct valve type
Data Source
Figure 1a~2b
Figure 3
AI summary
The invention relates to a pneumatic device (30) of a pneumatic system of a vehicle, in particular of a brake control system, air treatment system or air suspension system, comprising at least one socket (31, 32) configured to receive a solenoid valve (10, 20), wherein the socket (31, 32) is configured in a way that only one particular type of solenoid valve (10, 20) can be mounted.