Roll Stabilizer Vibration Damper for Vehicle Noise Reduction
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Solution Overview
Problem
Active roll stabilizers in motor vehicles often produce disruptive noises during vehicle movement, which can be bothersome for passengers.
Innovation Solution
The implementation of a vibration damper with an oscillating damper element and a damper spring, which is adjustable in rigidity to match the resonant frequencies of the roll stabilizer, thereby reducing unwanted vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a roll stabilizer is used to counteract vehicle body swaying, then vehicle stability is improved, but disruptive noises are generated
Solution Approach 1:
The patent applies the principle of converting harm into benefit by using the disruptive vibrations and noises generated by the roll stabilizer as the target for the vibration damper. The damper is specifically tuned to absorb the frequencies produced by the roll stabilizer, transforming the harmful vibrations into useful damping action. The damper element oscillates at the same frequency as the roll stabilizer vibrations, effectively converting the harmful mechanical energy into a controlled damping response that reduces noise while preserving stability.
Solution Approach 2:
The vibration damper serves as an intermediary element between the roll stabilizer and the vehicle body. It is disposed between the roll stabilizer and the vehicle body to absorb and dampen vibrations before they reach the passenger compartment. This intermediary component filters out the disruptive frequencies while allowing the roll stabilizer to maintain its stabilizing function, effectively mediating between the stabilizing mechanism and the vehicle structure.
2Object-generated harmful factors
If the vibration damper resonant frequency is adjusted to match roll stabilizer vibrations, then noise reduction is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by making the vibration damper's resonant frequency adjustable to match the specific operating conditions. The spring element's stiffness can be modified, and the damper's mass can be adjusted, allowing the resonant frequency to be tuned to the actual vibration frequencies generated by the roll stabilizer during cornering. This enables optimal noise reduction performance while maintaining a relatively simple overall device structure through straightforward parameter adjustments rather than complex mechanisms.
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 vibration damper effectively reduces or eliminates disruptive noises by absorbing vibrating energy from the roll stabilizer, thereby enhancing the overall driving experience by minimizing noise pollution within the vehicle.
Implementation Method 1
the resonant frequency of which is adjusted to vibrating frequencies that are to be eliminated. The vibration damper can execute sufficiently large deflections at these frequencies. The vibration damper draws vibrating energy from the roll stabilizer at these frequencies for its own vibrations.
Implementation Method 2
the vibration damper prevents or reduces vibrations of the roll stabilizer, which is normally supported by stabilizer bearings on the vehicle body. The vibrations of the roll stabilizer are substantially transverse to the axis of the roll stabilizer.
Implementation Method 3
The damper element can form a pendulum with the damper spring, the resonant frequency of which is adjusted to vibrating frequencies that are to be eliminated.
Data Source
AI summary
A roll stabilizer for a motor vehicle includes a torsion bar and a vibration damper located on the torsion bar. The vibration damper is configured to vibrate relative to the torsion bar. The vibration damper includes two half-shells formed together about the torsion bar. Damper elements are disposed between the half-shells. The damper elements can be adjusted via an adjustment component to alter the rigidity of the damper elements.