Front-End Module Vibration Suppression via Frequency-Band Mount Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibration suppression structures for vehicle front-end modules fail to effectively dampen vibrations from in-vehicle parts with different frequency bands without compromising the rigidity of the support, leading to pulsation sounds and vibrations transmitted into the vehicle compartment.
Innovation Solution
A vibration suppression structure that classifies in-vehicle parts into two frequency bands, with the first parts elastically supported by a heat exchanger support frame via a low-frequency mount member and the second parts rigidly fixed to the frame, while the frame is elastically supported by the vehicle body via a high-frequency mount member, allowing for differential damping without reducing support rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the mount member is tuned to damp vibration in low frequency bands, then low frequency vibration is suppressed, but supporting rigidity decreases leading to new vibration from external excitation
Solution Approach 1:
The patent segments the support function into two mount members with different characteristics. The first mount member provides low frequency vibration suppression while the second mount member maintains supporting rigidity and suppresses high frequency vibration. This segmentation allows the system to achieve both vibration suppression and rigidity maintenance without compromise.
Solution Approach 2:
Different mount members are assigned different functional qualities: the first mount member is optimized for vibration damping in low frequency bands, while the second mount member is optimized for maintaining rigidity and damping high frequency vibrations. This local quality differentiation resolves the contradiction between soft mounting for vibration suppression and rigid mounting for stability.
2Device complexity
If a single mount member is used for all in-vehicle parts, then device complexity is reduced, but vibration suppression effectiveness deteriorates due to different frequency bands
Solution Approach 1:
The patent segments the mounting structure into two distinct mount members with different vibration suppression characteristics. This segmentation is necessary because different in-vehicle parts vibrate in different frequency bands, and a single mount member cannot effectively suppress vibrations across all frequency ranges. The first mount member handles low frequency vibrations while the second handles high frequency vibrations.
Solution Approach 2:
The patent applies different mounting characteristics to different parts based on their vibration frequency bands. Parts vibrating in low frequency bands are mounted using the first mount member optimized for low frequency suppression, while parts vibrating in high frequency bands use the second mount member optimized for high frequency suppression. This local quality approach maximizes vibration suppression effectiveness.
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 configuration effectively suppresses vibrations and pulsation sounds from both low and high-frequency bands without decreasing the rigidity of the in-vehicle parts' support, ensuring a quiet vehicle compartment while maintaining structural integrity.
Implementation Method 1
The first in-vehicle part is elastically supported by the heat exchanger support frame interposed by a first mount member
Implementation Method 2
The heat exchanger support frame is elastically supported by a vehicle body interposed by a second mount member
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Pulsation sound/vibration propagated from a plurality of in-vehicle parts incorporated in a vehicle front section via a vehicle body into a vehicle compartment is suppressed with no decrease in rigidity with which the in-vehicle parts are supported by the vehicle body. In a front-end module (FEM) in which a plurality of in-vehicle parts (12), (40), (42), and (28) incorporated in a vehicle front section are aggregated and assembled to a heat exchanger support frame (50), the plurality of in-vehicle parts (12), (40), (42), and (28) are classified into first in-vehicle parts (12), (40), and (42), which vibrate at frequencies in a first frequency band, and a second in-vehicle part (28), which vibrates at a frequency in a second frequency band having a frequency range higher than the frequency range in the first frequency band. The first in-vehicle parts (12), (40), and (42) are elastically supported by the heat exchanger support frame (50) via first mount members (51), (52), and (53). The second in-vehicle part (28) is rigidly fixed to the heat exchanger support frame (50). The heat exchanger support frame (50) is elastically supported by a vehicle body via second mount members (57) and (58).