Hydraulic Valve Balancing Brake Circuits via Slider Mechanism
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Solution Overview
Problem
Current hydraulic brake systems for operating machines face challenges in maintaining balanced braking power between two independent circuits, leading to potential swerving due to manufacturing tolerances, spring elasticity differences, and imperfect alignment, and are inefficient in terms of pedal stroke and force required, with existing solutions either requiring expensive servo-controls or increasing pedal stroke length.
Innovation Solution
A hydraulic valve system that connects two parallel brake circuits, allowing for balanced braking power distribution by using a slider mechanism and springs to adjust pressure differences, enabling operation of front wheels only when necessary, and maintaining braking action even with oil leaks in one circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If pumps are used to move considerable amounts of pressurised oil to limit pedal stroke, then pedal stroke is limited, but considerable physical effort is required from the driver
Solution Approach 1:
A servo-control device is introduced as an intermediary between the driver's pedal input and the hydraulic brake system. The servo-control magnifies the driver's applied force through hydraulic pressure multiplication, enabling limited pedal stroke without requiring excessive physical effort from the driver.
Solution Approach 2:
The patent replaces direct mechanical force transmission with a hydraulic system. Instead of relying solely on mechanical leverage, the system uses hydraulic pressure generated by the servo-control to move considerable amounts of pressurised oil, substituting mechanical effort with hydraulic force multiplication.
2Force
If servo-controls are fitted to limit force on pedals, then force required is reduced, but production and purchasing costs increase significantly
Solution Approach 1:
The brake system is divided into two independent parallel brake circuits, each with its own selector valve and hydraulic components. This segmentation allows the system to achieve force reduction through hydraulic principles without requiring expensive servo-controls in each circuit, as the selector valves provide sufficient force multiplication.
Solution Approach 2:
Instead of using expensive servo-controls, the patent employs selector valves that replicate the essential function of force multiplication through simpler hydraulic mechanisms. The selector valves copy the force-reduction effect of servo-controls but achieve it through more cost-effective design and components.
3Force
If pumps move limited amounts of oil to reduce operating force, then force required is reduced, but pedal stroke increases considerably
Solution Approach 1:
The system dynamically adjusts hydraulic pressure based on the driver's pedal input. The selector valves and hydraulic circuits are designed to provide variable force multiplication, enabling the system to maintain short pedal stroke while reducing operating force through dynamic pressure regulation rather than fixed displacement pumping.
4Stability of the object's composition
If manufacturing tolerances and spring elasticity differences exist in parallel brake circuits, then braking imbalance occurs causing swerving, but achieving perfect balance increases complexity
Solution Approach 1:
The hydraulic system automatically compensates for imbalances between the two brake circuits through its inherent pressure equalization properties. The common hydraulic source and parallel circuit design allow the system to self-regulate pressure distribution, compensating for manufacturing tolerances and spring variations without requiring additional balancing mechanisms or increased complexity.
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
The system achieves balanced braking on both sides of the operating machine, reduces the effort required to operate the pedals, and ensures continued braking functionality even if one circuit leaks, preventing swerving and improving safety during transportation.
Implementation Method 1
A hydraulic valve system that connects two parallel brake circuits, allowing for balanced braking power distribution by using a slider mechanism and springs to adjust pressure differences
Data Source
AI summary
A hydraulic valve suitable for operating apparatus (500) of brakes of wheels of a vehicle includes body means (2) having first inlet means (21), second inlet means (22) that are connected to respective supply apparatus (23; 24) of pressurized fluid, first outlet means (25) and second outlet means (26); first distributing means and second distributing means (5) arranged to connect the first inlet means (21) to the first outlet means (25) and second inlet means (22) to the second outlet means (26) respectively, first thrust means (7) and second thrust means (8) arranged to operate the first distributing means (5) and second distributing means (6) respectively, and a hydraulic connection between said first distributing means (5) and second distributing means (6) so that the first distributing means (5) act on the second distributing means (6) and vice versa.