Spring-Loaded Neutralizing Valve for Trailer Anti-Lock Braking
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Solution Overview
Problem
Pneumatic trailer brake systems face issues with wheels locking during emergency braking due to spring-loaded brakes, leading to tire damage and instability, as existing anti-lock braking systems (ABS) cannot effectively prevent wheel locking and may cause uneven braking pressure.
Innovation Solution
A spring-loaded neutralizing valve is introduced to maintain stable compressed air pressure in spring-loaded cylinders during anti-lock braking, allowing full braking with anti-lock protection by integrating it into the brake control modulator, which can be easily incorporated into existing systems without significant additional costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If spring-loaded brakes are used for emergency braking, then high braking force is achieved, but wheels lock leading to tire damage and vehicle instability
Solution Approach 1:
A neutralizing valve is introduced as an intermediary component between the spring-loaded brake cylinder and the atmosphere. This valve controls the venting of compressed air from the spring-loaded cylinder, preventing uncontrolled brake application that would cause wheel locking. The valve mediates between the emergency braking function and wheel protection, allowing controlled pressure release while maintaining braking effectiveness.
2Stability of the object's composition
If anti-lock braking control is deactivated on one side to maintain spring-loaded cylinder pressure, then pressure stability is improved, but wheel locking still occurs and vehicle stability is compromised
Solution Approach 1:
The neutralizing valve serves as a mediator that allows both sides of the vehicle to maintain stable spring-loaded cylinder pressures while preventing wheel locking. By controlling the venting process on each side independently through this intermediary device, the system achieves pressure stability without sacrificing vehicle stability or allowing wheel lock-up.
Solution Approach 2:
The patent replaces the mechanical approach of deactivating anti-lock control with a pneumatic control mechanism (neutralizing valve). Instead of disabling the anti-lock braking system mechanically, the system uses controlled venting of the spring-loaded cylinder to achieve the same protective effect while maintaining anti-lock control functionality on both sides of the vehicle.
3Reliability
If a shuttle valve is used to refill spring-loaded cylinders during emergency braking, then anti-lock function is restored, but complex valve arrangements and control issues arise
Solution Approach 1:
The patent extracts the neutralizing function from the complex valve arrangement and implements it as a dedicated neutralizing valve. This separate, specialized component simplifies the overall system by assigning a specific function (venting control) to a dedicated device, rather than relying on complex interactions between multiple valves like the shuttle valve and anti-lock valves.
Solution Approach 2:
The neutralizing valve acts as an intermediary that simplifies the control architecture. Instead of requiring complex coordination between shuttle valves, anti-lock valves, and spring-loaded cylinder controls, this single intermediary device handles the venting control, reducing the overall system complexity while maintaining anti-lock functionality.
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 solution ensures effective anti-lock protection on both sides of the vehicle, preventing tire damage and instability, and can be implemented without additional costs, enhancing safety for road trains.
Implementation Method 1
A spring-loaded neutralizing valve is introduced to maintain stable compressed air pressure in spring-loaded cylinders during anti-lock braking
Implementation Method 2
compressed air from a storage tank in the trailer is automatically fed into the service brake cylinder
Data Source
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AI summary
The invention relates to a pneumatic brake system for a trailer vehicle and to a brake control modulator for such a brake system. Taking this as a starting point, the invention specifies a pneumatic brake system for a trailer and a brake control modulator which permit a full braking action of the trailer with anti-lock function even in an emergency braking situation. For this purpose, a spring store neutralizing valve (7) is provided, by means of which the compressed air filled into the spring store cylinder by an electronic control device (2) can be at least partially held.