Damper Bearing With Active Spring Element For High-Frequency Vibration Control
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Solution Overview
Problem
Existing damper bearings for motor vehicle chassis components inadequately address high-frequency excitations, leading to insufficient acoustic damping and reduced tire and acoustic comfort.
Innovation Solution
Incorporating a controllable active spring element in series with a damping element and a coupling element between bearing elements, with optional bump stops to manage high-frequency excitations and protect the active spring element, effectively reducing high-frequency vibrations and providing enhanced damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional damping element is used to support chassis components, then basic vibration damping is achieved, but high-frequency excitations are not adequately attenuated
Solution Approach 1:
The patent applies dynamics by replacing the passive damping element with an active spring element whose stiffness can be dynamically adjusted based on operating conditions. This allows the system to adapt to varying frequency excitations, particularly effectively attenuating high-frequency vibrations that conventional passive dampers cannot handle. The active control system modifies the spring characteristics in real-time to optimize damping performance across different frequency ranges.
Solution Approach 2:
The invention changes the physical parameters of the spring element by adjusting its stiffness dynamically. By varying the spring constant based on detected vibration characteristics, the system can target specific frequency ranges for attenuation. This parameter adjustment enables effective high-frequency damping while maintaining reliability, as the system can optimize its response to match actual operating conditions rather than relying on fixed passive properties.
2Object-affected harmful factors
If an active spring element is added to improve high-frequency damping, then acoustic comfort is enhanced, but device complexity increases
Solution Approach 1:
The active spring element serves multiple functions simultaneously: it provides mechanical support for the chassis component, dampens vibrations across a broad frequency range, and specifically targets high-frequency excitations to improve acoustic comfort. By integrating these functions into a single element rather than adding separate components, the patent enhances acoustic comfort while limiting the increase in device complexity.
Solution Approach 2:
The active spring element acts as an intermediary between the chassis component and the vehicle body, mediating the transmission of vibrations. This intermediary can actively control the force transmission based on detected vibration characteristics, providing intelligent damping without requiring complex additional control systems. The bump stop further mediates extreme cases by providing a mechanical limit, simplifying the control requirements.
3Object-affected harmful factors
If the active spring element is directly connected to bearing elements, then high-frequency compensation is effective, but the active spring element is exposed to excessive loads
Solution Approach 1:
The bump stop is positioned beforehand to cushion extreme loads before they reach the active spring element. This protective element engages during high-amplitude events to limit the maximum force transmitted to the active spring, preventing excessive loads that could damage the sensitive active component. This beforehand cushioning allows the active spring to effectively compensate high-frequency excitations during normal operation while being protected from destructive extreme conditions.
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 significantly improves acoustic and tire comfort by effectively attenuating high-frequency excitations across a wide frequency band, while protecting the active spring element from excessive loads.
Implementation Method 1
a reduction/attenuation of interfering, high excitation frequencies over a wide frequency band by a targeted vibration superposition
Implementation Method 2
a damping element which is arranged between the two bearing elements and is made of a shock-absorbing material
Implementation Method 3
the active spring elements are formed as piezo actuators
Data Source
AI summary
The invention relates to a damper bearing (10) for supporting a chassis component on a motor vehicle body, including a first bearing element (12) for attachment to the motor vehicle body, a second bearing element (14) for attachment to the chassis component, and a damping element (16) which is active between the first and the second bearing elements (12, 14) and which is made of a shock-absorbing material. The invention is characterized in that a coupling element (18) is arranged between the first and the second bearing elements (12, 14), with the second bearing element (14) interacting via the coupling element with at least one active spring element (20) which is arranged on the coupling element (18) and effective in series with the damping element (16).