Brake Hydraulic Block Riser Cavity for Gas Bubble Noise Control
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Solution Overview
Problem
Brake fluids in electronically controlled slip brake systems release gas due to temperature and pressure changes, leading to gas bubbles that cause noise and pressure pulsations, making it difficult to predict and maintain the system's performance over its lifetime.
Innovation Solution
A hydraulic cavity with a riser pipe is integrated into the hydraulic block, allowing gas bubbles to collect due to gravitational buoyancy, reducing noise and pressure pulsations without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If flexible brake lines and elastic brackets are used to reduce noise and pressure pulsations, then the functional properties and noise behavior are improved, but the device complexity and installation space requirements increase
Solution Approach 1:
The patent integrates the gas bubble collection function directly into the hydraulic block by forming a hydraulic cavity within the block itself, merging the gas separation function with the existing hydraulic structure. This eliminates the need for separate external damping devices, flexible brake lines, or elastic brackets, thereby reducing device complexity while maintaining noise reduction and pressure pulsation mitigation.
Solution Approach 2:
The patent extracts the harmful gas bubbles from the main hydraulic circuit by providing a dedicated hydraulic cavity that collects gas bubbles through gravimetric buoyancy. By removing gas bubbles from the circulating brake fluid, the system eliminates noise and pressure pulsations without requiring complex external damping components.
2Object-affected harmful factors
If additional damping devices are installed to reduce adverse effects of gas bubbles, then noise and pressure pulsations are reduced, but parts costs and assembly complexity increase
Solution Approach 1:
The hydraulic cavity is formed as an integrated feature of the hydraulic block through casting or machining, combining the gas collection function with the existing hydraulic structure. This eliminates the need for separate damping devices, reducing parts costs and simplifying assembly while effectively reducing operating noise and pressure pulsations.
3Device complexity
If conventional hydraulic blocks without gas collection features are used, then the design is simpler, but gas bubbles accumulate in the brake circuits causing noise and performance degradation
Solution Approach 1:
The patent extracts gas bubbles from the hydraulic circuit by providing a dedicated hydraulic cavity that collects gas bubbles through gravimetric buoyancy. The riser pipe enables gas bubbles to rise and accumulate in the cavity, separating them from the main brake fluid circulation path. This simple structural addition effectively eliminates gas bubble-related noise and performance degradation without complicating the overall design.
Solution Approach 2:
The hydraulic cavity acts as an intermediary space between the brake fluid circulation path and the external environment. Gas bubbles are transferred from the circulating brake fluid into this intermediate cavity through the riser pipe, where they are collected and isolated, preventing them from causing noise and performance issues in the main hydraulic system.
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 solution effectively reduces operating noise and pressure pulsations by collecting gas bubbles, ensuring consistent performance and simplifying the design of the braking system.
Implementation Method 1
allowing gas bubbles to collect due to the effective gravimetric buoyancy
Data Source
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AI summary
The invention relates to hydraulics assembly, in particular for controlling the brake pressure of a wheel brake of an electronically slip-controllable brake system of a motor vehicle. Known hydraulics assemblies comprise a hydraulic block (10) having a recess (12; 14) for receiving a pump element, a line connection (22) for contacting the hydraulics assembly to the wheel brake, channels (20) for providing the pump element with brake fluid, and a hydraulic cavity (28) formed in the interior of the hydraulic block (10), which cavity is contacted with the recess (12; 14) for the pump element. According to the invention, said cavity (28) comprises a riser (26), which extends from the recess (12; 14) for the pump element in the direction toward the line connection (22; 24) of the hydraulic block (10) and is contacted with the recess (12; 14) for the pump element. Such a suction line (26) collects gas escaping from the pressure means due to temperature and/or pressure changes and improves the operating noise of the hydraulics assembly, for example.