Frequency-Tuned Mounting Damper for Vehicle NVH Isolation
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Solution Overview
Problem
Vehicle systems generate noise and vibration during operation, leading to rapid component degradation and negative consumer perception, necessitating improved frequency dampening solutions.
Innovation Solution
A vibration isolating damper comprising a primary isolator of elastomeric material with a tubular body, a shoulder, a fastener, a rigid tube, and a coil spring, designed to secure a first structure to a second structure, limiting vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional dampening components are used, then noise and vibration are reduced, but component degradation still occurs rapidly and vehicle quality perception remains negative
Solution Approach 1:
The patent employs a composite dampening structure combining elastomeric material (primary isolator) with metal components (coil spring, rigid tube, fastener). The elastomeric material provides vibration isolation while the metal components provide structural integrity and frequency tuning capabilities, creating a composite system that simultaneously reduces noise/vibration and prevents component degradation
Solution Approach 2:
The patent utilizes the coil spring to introduce a specific resonant frequency into the dampening system. By carefully selecting the spring stiffness and geometry, the system creates a tuned mass damper effect that targets specific vibration frequencies, changing the dynamic parameters of the isolator to achieve both noise reduction and durability improvement
2Object-affected harmful factors
If frequency dampening is implemented, then noise and vibration are mitigated, but the system complexity increases with multiple components
Solution Approach 1:
The patent merges multiple dampening functions into a single integrated assembly. The primary isolator, coil spring, rigid tube, and fastener work together as one unified vibration isolation unit, combining isolation, damping, and frequency tuning functions in a single component package that simplifies installation while maintaining complex dampening capabilities
Solution Approach 2:
The patent employs a nested configuration where the coil spring is disposed about the rigid tube, which in turn is disposed about the fastener rod portion. The primary isolator encompasses these components within its tubular body. This nested arrangement achieves complex dampening functionality while minimizing the overall spatial footprint and reducing the number of separate mounting operations required
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
Reduces noise, vibration, and harshness (NVH) by effectively damping vibrations between structures, enhancing vehicle quality and component durability.
Implementation Method 1
a primary isolator of elastomeric material configured to engage the first structure for securement thereto
Implementation Method 2
a coil spring disposed about the rigid tube and engaging the shoulder of the primary isolator within the tubular body
Data Source
AI summary
A vibration isolating damper for securing a first structure to a second structure includes a primary isolator of elastomeric material configured to engage the first structure for securement thereto and including a tubular body and a shoulder adjacent to an axial end of the tubular body, the shoulder extending radially inwardly to partially close the axial end of the tubular body. The vibration isolating damper also includes a fastener having a rod portion extending through the tubular body of the primary isolator and configured for securement to the second structure; a rigid tube disposed about the rod portion of the fastener and extending through the tubular body of the primary isolator; and a coil spring disposed about the rigid tube and engaging the shoulder of the primary isolator within the tubular body.