Trailer Brake Adaptor Coupling Detection Across Brake Standards
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Solution Overview
Problem
Existing trailer brake circuits face challenges in adapting to harmonize with different regulatory standards, such as the transition from CUNA to Mother Regulation, necessitating cost-effective solutions for safe and efficient coupling between tractor and trailer brake systems.
Innovation Solution
An adaptor is designed to facilitate fluidic connection between tractor brake circuits adhering to dual-line Mother Regulation and trailer brake circuits adhering to single-line CUNA Regulation, incorporating a plunger and switch mechanism to ensure safe and reliable detection of coupling, even with tolerances and vibrations, using a deformable contact portion to maintain contact with the switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an adaptor is designed to facilitate fluidic connection between dual-line Mother Regulation tractor brake circuits and single-line CUNA Regulation trailer brake circuits, then adaptability to different regulatory standards is improved, but device complexity increases due to the plunger and switch mechanism
Solution Approach 1:
The adaptor is designed to work with both dual-line Mother Regulation tractor brake circuits and single-line CUNA Regulation trailer brake circuits, making it universally compatible across different regulatory standards. The single adaptor unit handles multiple connection scenarios through its integrated plunger and switch mechanism.
Solution Approach 2:
The plunger and switch mechanism acts as an intermediary between the tractor brake circuit and trailer brake circuit. This intermediate mechanism detects the coupling state and facilitates proper fluidic connection, mediating the interaction between incompatible regulatory standards.
2Reliability
If a plunger and switch mechanism is incorporated to detect coupling, then reliability of coupling detection is improved, but ease of manufacture deteriorates
Solution Approach 1:
The plunger mechanism is designed to be automatically actuated by the coupling action itself. When the adaptor couples to the brake circuit, the plunger is naturally pushed or pulled into position, and the switch is automatically actuated, eliminating the need for separate manual detection mechanisms.
Solution Approach 2:
The mechanical plunger and switch mechanism replaces more complex electronic or sensor-based detection systems. This mechanical approach uses simple physical contact and movement to detect coupling, which is more reliable and easier to manufacture than sophisticated electronic sensing systems.
3Reliability
If a deformable contact portion is used to maintain contact with the switch, then reliability of contact maintenance is improved under vibrations, but manufacturing precision requirements increase
Solution Approach 1:
The contact portion is designed with deformable properties that allow it to change its physical state under load. When the plunger actuates the switch, the deformable contact portion compresses or deforms to maintain continuous contact, ensuring reliable electrical connection even during vibrations or misalignments.
Solution Approach 2:
The deformable contact portion acts as a cushioning element that anticipates and absorbs vibrations or misalignments before they can cause contact loss. This pre-compression or pre-deformation ensures that the electrical contact is maintained throughout the operational range.
Data Source
Figure 1
Figure 2
AI summary
Adaptor (1) for connecting a tractor brake hydraulic circuit comprising a tractor brake valve (2) and a trailer brake hydraulic circuit, the adaptor (1) comprise sensor means (10) configured to generate a control signal when the adaptor (1) is connected to the tractor brake valve (2), the sensor means (10) comprising a plunger (11) carried by one between the adaptor (1) and the tractor brake valve (2) and a switch (12) carried by the other between the adaptor (1) and the tractor brake valve (2).