Brake Pressure Control Between Dual Hydraulic Circuits
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Solution Overview
Problem
Existing braking systems with dual braking devices on a wheel suffer from uniformity in actuation and wear, and a hydraulic failure in one device can compromise the entire system, leading to safety risks.
Innovation Solution
A pressure control device that maintains separate actuation pressures for each braking device, ensuring uniformity and safety by fluidly connecting the circuits only when both pressures exceed a threshold, isolating them otherwise, using mechanical valves and pistons to manage pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two braking devices are hydraulically connected to the same pressure chamber, then uniform braking action and wear conditions are achieved, but hydraulic leakage in one device causes pressure loss for the entire system, compromising safety
Solution Approach 1:
The hydraulic system is divided into two separate circuits (first circuit and second circuit) that are hydraulically independent. Each circuit has its own pressure chamber, fluid passages, and braking device, eliminating the risk that a leak in one circuit will affect the other. The segmentation allows each circuit to operate independently while still achieving uniform braking through pressure balancing.
Solution Approach 2:
A pressure control device acts as an intermediary between the two independent hydraulic circuits. This device includes pressure control mechanisms (such as valves or pistons) that detect pressure differences between the circuits and automatically adjust fluid flow to balance pressures, ensuring uniform braking action without requiring direct hydraulic connection between the circuits.
2Duration of action of stationary object
If two braking devices are hydraulically connected to the same pressure chamber, then uniform wear conditions are achieved, but any hydraulic leakage precludes operation of the entire system
Solution Approach 1:
The hydraulic system is divided into two separate circuits (first circuit and second circuit) that are hydraulically independent. Each circuit has its own pressure chamber, fluid passages, and braking device, eliminating the risk that a leak in one circuit will affect the other. The segmentation allows each circuit to operate independently while still achieving uniform braking through pressure balancing.
Solution Approach 2:
The pressure control mechanisms in the pressure control device continuously monitor pressure differences between the two circuits and automatically adjust fluid flow to maintain pressure balance. This feedback control ensures that wear conditions remain uniform while the system can continue operating even if one circuit experiences a leak, as the other circuit remains functional.
3Reliability
If separate hydraulic circuits are used for each braking device, then system safety is improved, but pressure uniformity between braking devices must be actively controlled
Solution Approach 1:
A pressure control device acts as an intermediary between the two independent hydraulic circuits. This device includes pressure control mechanisms (such as valves or pistons) that detect pressure differences between the circuits and automatically adjust fluid flow to balance pressures, ensuring uniform braking action without requiring direct hydraulic connection between the circuits.
Solution Approach 2:
The pressure control mechanisms are designed to automatically detect and correct pressure imbalances between the two circuits without requiring external control or intervention. The mechanisms use the pressure differential itself to drive the balancing action, such as through pressure-actuated valves or pistons that open or close based on the pressure difference, making the system self-regulating.
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
Ensures uniform brake actuation and wear while preventing system failure from hydraulic leaks, enhancing safety by isolating circuits during failures and maintaining aligned pressures.
Implementation Method 1
when the first circuit pressure and the second circuit pressure exceed a threshold pressure, putting the first circuit and the second circuit in fluid communication, so as to align the first circuit pressure and the second circuit pressure with an actuating pressure
Data Source
AI summary
A pressure control device has a device body partially delimiting a first circuit side opening, a second circuit side opening, and a conduit having a first conduit portion connectable to a first circuit to receive a first circuit fluid at a first circuit pressure and a second conduit portion connectable to a second circuit to receive a second circuit fluid at a second circuit pressure. A pressure adjusting mechanism controls the first and/or second circuit pressure to reach an actuating pressure. When at least one of the first and second circuit pressures is lower than a threshold pressure, the pressure adjusting mechanism prevents fluid passages between the first and second conduit portions to actuate either a first or a second braking device. When the first and second circuit pressures are both higher than the threshold pressure, the pressure control connects the first and second conduit portions to actuate the first and second braking devices.