Corrugated Elastomer Damper for Hydraulic Brake Noise Reduction
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Solution Overview
Problem
Slip-controlled hydraulic vehicle brake systems experience noise generation and reduced control quality due to pressure fluctuations in brake fluid, which existing pressure change dampers do not adequately address.
Innovation Solution
A pressure change damper with a tubular, elastically deformable damper element featuring corrugations on both the inside and outside, where wave troughs and crests are offset, providing a more uniform wall thickness and enhanced elasticity, allowing for improved damping behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a damper element with corrugation only on the outside is used, then the manufacturing process is simpler, but the damping behavior is insufficient and wall thickness uniformity is poor
Solution Approach 1:
The corrugation structure is segmented into two distinct locations: outer corrugations and inner corrugations. This segmentation allows each corrugation layer to contribute differently to the overall damping function, with outer corrugations providing initial compliance and inner corrugations enhancing the damping effect while maintaining wall thickness uniformity.
Solution Approach 2:
The inner corrugations are nested within the damper element wall, inside the outer corrugations. This nested structure allows the inner corrugations to work in conjunction with the outer corrugations, creating a multi-layered damping mechanism that improves performance without significantly increasing external dimensions.
2Reliability
If the wave height of outer corrugation is increased for better damping, then damping performance improves, but wall thickness variation increases reducing uniformity
Solution Approach 1:
The damper element exhibits local quality variations through the inner corrugations, which create regions of different wall thickness and stiffness within the wall structure. This allows different parts of the wall to have optimized properties for their specific function: outer regions provide structural integrity while inner regions enhance damping through controlled compliance.
Solution Approach 2:
The damper element functions as a composite structure with outer and inner corrugation layers working together. The combination of these two corrugation systems creates a composite damping mechanism that achieves superior performance compared to single-layer corrugations, balancing high damping capability with acceptable wall thickness uniformity.
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 noise and enhances control quality by efficiently damping pressure fluctuations in the brake fluid, improving the overall performance of the hydraulic vehicle brake system.
Implementation Method 1
a tubular, elastically deformable damper element (14)... elastic deformation of the damping element consumes energy and thereby dampens deformation
Implementation Method 2
elastic deformation of the damping element consumes energy and thereby dampens deformation
Data Source
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AI summary
The invention relates to a pressure variation damper (11) for a slip-controlled hydraulic vehicle brake system that includes a piston pump as a hydraulic pump. The pressure variation damper (11) comprises a tubular damper element (14) in a dome-shaped damper housing (13), said damper element (14) being made of an elastomer and being open at one end and closed at one end. According to the invention, the damper element (14) has a peripherally extending wavy structure (16) on an outer face and peripherally extending wave crests (18) and/or peripherally extending wave troughs (19) on an inner face.