Trailer Parking Valve Actuation for Automatic Emergency Braking
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Solution Overview
Problem
Current compressed air devices for commercial vehicle trailers lack a compact design that can expand functionality while ensuring safety and efficiency in braking operations, particularly in scenarios where manual intervention is forgotten or unavailable.
Innovation Solution
A compressed air device with a parking valve equipped with two electrically actuated actuators and an electronic control unit that provides additional functions such as authorization checks, emergency braking, and automated parking safety, integrated into a structural unit that includes a shunting valve, lifting/lowering valve, and pressure sensors to enhance operational control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a parking valve is manually operated, then the device structure remains simple, but the risk of forgotten manual intervention increases
Solution Approach 1:
The parking valve system performs automatic parking brake actuation without requiring manual intervention. The control unit monitors system pressure and automatically activates the parking valve when uncoupling is detected, making the system self-serve the safety function rather than relying on user action.
Solution Approach 2:
The control unit continuously monitors the pneumatic system pressure and coupling status, providing feedback to determine when automatic parking brake actuation is required. This feedback mechanism enables the system to respond automatically to changing operating conditions.
2Volume of moving object
If multiple valve functions are integrated into one structural unit, then the device compactness improves, but the manufacturing complexity increases
Solution Approach 1:
The parking valve, shunting valve, and lifting/lowering valve are integrated into a single structural unit with a common housing. This merging of previously separate components into one compact assembly reduces overall system volume while the modular internal design maintains manufacturing feasibility.
Solution Approach 2:
The structural unit is designed as a multi-functional valve device that performs parking brake control, air supply shunting, and lifting/lowering operations through integrated valves. This universal design consolidates multiple functions into one component, reducing the number of separate parts needed.
3Reliability
If automated control functions are added, then the operational safety improves, but the device complexity increases
Solution Approach 1:
The control unit is pre-programmed with logic to detect uncoupling conditions and automatically activate the parking brake before the vehicle can move. This preliminary automated action prevents the safety hazard of forgotten manual intervention from occurring in the first place.
Data Source
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AI summary
The invention relates to a compressed air system (125) for a trailer of a commercial vehicle. In the compressed air system (125), a parking valve (10) has two actuators (109, 110). The actuators (109, 110) allow for electrical actuation of the parking valve (10) in addition to manual actuation. This enables additional functions such as an immobilization function, an emergency braking function, an emergency braking function override function, and/or a parking safety function.