Brake Booster Damping Element on Fastening Bolt
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Solution Overview
Problem
The increasing use of lightweight materials in vehicle brake systems leads to undesirable vibrations and noise due to increased oscillation tendencies, which existing damping solutions, such as pot-like damping elements attached to the return spring, can cause assembly and operational issues.
Innovation Solution
Attaching damping elements directly to the fastening bolts of the brake booster device, specifically engaging the outer or inner peripheral areas of the return spring, to effectively suppress vibrations and ensure stable positioning and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If lightweight materials are used in the brake mechanism, then weight is reduced, but vibration tendency increases
Solution Approach 1:
A damping element is introduced as an intermediary component between the lightweight brake mechanism components (pedal, bracket) and the housing. This damping element absorbs and dissipates vibration energy, preventing the transmission of vibrations to the actuating mechanism while allowing the lightweight construction to be maintained.
Solution Approach 2:
The damping element converts the harmful vibration energy generated by lightweight components into beneficial thermal energy through internal friction and hysteresis. The vibration energy is dissipated as heat within the damping material, transforming the harmful oscillation into a harmless thermal effect.
2Object-affected harmful factors
If a pot-like damping element is attached to the return spring, then vibration damping is achieved, but assembly and operational problems occur
Solution Approach 1:
The damping function is segmented from the return spring by using a separate, dedicated damping element. This allows the damping element to be optimized for vibration absorption while the return spring maintains its original function, avoiding the complexity and reliability issues of modifying the spring itself with integrated damping features.
Solution Approach 2:
Instead of modifying the return spring to include damping features, a separate damping element is created that copies and performs the damping function independently. This simplified damping element can be easily attached to the housing without complicating the return spring design or assembly process.
3Ease of manufacture
If the damping element is attached to the fastening bolt, then assembly is simplified and positioning is stable, but the damping element must effectively engage the return spring
Solution Approach 1:
The fastening bolt serves multiple functions: it secures the control valve housing to the housing, and simultaneously serves as the mounting element for the damping element. This multi-functionality simplifies assembly by using an existing structural element for dual purposes, eliminating the need for separate mounting hardware.
Solution Approach 2:
The damping element is designed with a contact surface that matches the peripheral area of the return spring, creating an equipotential contact interface. This ensures uniform distribution of damping force around the return spring's perimeter, providing stable and reliable vibration damping without requiring precise positioning adjustments.
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 approach significantly reduces vibration transmission to the actuating mechanism, ensuring error-free assembly and operational reliability by directly addressing the vibration issue at its source and maintaining damping effectiveness throughout the device's service life.
Implementation Method 1
at least one damping element which acts on the return spring for vibration damping
Data Source
Figure 1~3
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Figure 6~7
AI summary
The present invention relates to a brake booster device (10) for a vehicle brake system having a force input element (12), a control valve arrangement (14) which can be actuated via the force input element (12), a chamber arrangement (24) which is arranged in a housing (16) and has a vacuum chamber (20) and a working chamber (22) which is separated from the vacuum chamber (20) via a movable wall (18) and can optionally be connected to a vacuum source or to atmosphere, and a force output element (34), wherein the movable wall (18) is prestressed into an initial position by means of a restoring spring (38) which is accommodated at least partially in the housing (16), and wherein the housing (16) is penetrated by at least one fastening bolt (40, 42). There is provision here for at least one damping element (48, 50) to act on the restoring spring (38) for vibration damping, wherein the at least one damping element (48, 50) is attached to the at least one fastening bolt.