Brake System With Segmented Valves For Leakage Isolation
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Solution Overview
Problem
Existing brake systems lack effective isolation and pressure management between brake lines, leading to potential fluid leakage issues and reduced braking efficiency, especially in failure states where one line may compromise the other.
Innovation Solution
A brake system with a common passage connected to power hydraulic pressure source and brake cylinders, featuring first and second individual control valves that are normally-close and normally-open electromagnetic valves respectively, allowing for independent operation and isolation of brake lines, enabling hydraulic pressure supplementation from alternative sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single hydraulic passage is used to supply pressure to all brake cylinders, then the system structure is simple, but fluid leakage in one line can compromise the entire system
Solution Approach 1:
The hydraulic system is divided into multiple independent brake lines, each with its own passage and control valve. This segmentation allows isolation of individual brake cylinders from the common hydraulic source, so that leakage or failure in one line does not affect other lines. The common passage branches into individual passages for each brake cylinder, creating independent hydraulic circuits while maintaining a relatively simple overall structure.
2Reliability
If normally-open electromagnetic valves are used for all brake cylinders, then the system can operate with power failure, but hydraulic pressure cannot be supplemented from alternative sources when needed
Solution Approach 1:
Different types of electromagnetic valves are assigned to different brake cylinders based on their functional requirements. Some brake cylinders use normally-open valves for fail-safe operation, while others use normally-close valves that can be actively opened to allow hydraulic pressure supplementation from alternative sources. This local differentiation enables both power-failure operation and pressure supplementation capabilities within the same system.
3Stress or pressure
If all brake cylinders are connected to the same hydraulic source, then pressure distribution is uniform, but independent pressure control for each brake line is limited
Solution Approach 1:
Individual control valves are introduced as intermediaries between the common hydraulic passage and each brake cylinder. These valves provide independent control over hydraulic pressure delivery to each brake line, allowing selective activation and pressure regulation for specific brakes while all lines remain connected to the same hydraulic source. This intermediary mechanism enables both uniform pressure distribution and independent pressure control.
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 configuration ensures that even if fluid leakage occurs in one brake line, the other remains unaffected, and allows for increased hydraulic pressure distribution, enhancing braking efficiency and reliability, particularly in failure states.
Implementation Method 1
the first individual passage is provided with a first individual control valve, the first individual control valve being a normally-close electromagnetic valve that is to be placed in a closed state when electric current is not being supplied to a solenoid of the first individual control valve
Implementation Method 2
the second individual passage is provided with a second individual control valve, the second individual control valve being a normally-open electromagnetic valve that is to be placed in an open state when electric current is not being supplied to a solenoid of the second individual control valve
Implementation Method 3
a power hydraulic pressure source including a drive source that is activatable by supply of electric energy thereto, and configured to generate hydraulic pressure by activation of the drive source
Data Source
AI summary
A brake system including: (i) hydraulic brakes provided for respective wheels of a vehicle, and configured to be activated by hydraulic pressures of respective brake cylinders so as to restrain rotations of the respective wheels; (ii) a power hydraulic pressure source including a drive source that is activatable by supply of electric energy, and configured to generate hydraulic pressure by activation of the drive source; and (iii) a common passage to which the power hydraulic pressure source and the brake cylinders of the hydraulic brakes are connected. The brake cylinders include a first brake cylinder connected to the common passage via a first individual passage that is provided with a normally-close electromagnetic valve as a first individual control valve. The brake cylinders include a second brake cylinder connected to the common passage via a second individual passage that is provided with a normally-open electromagnetic valve as a second individual control valve.