EV Suspension Mount Structure for Low-Transmissibility Vibration Isolation
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Solution Overview
Problem
Existing suspension mount structures for electrified vehicles fail to effectively reduce vibration transmissibility, which is different from conventional internal combustion engine vehicles, and require high damper performance, increasing manufacturing costs and space requirements.
Innovation Solution
A suspension mount structure for electrified vehicles that includes a spring and a damper connected in series, with a method for evaluating performance using specific equations to minimize vibration transmissibility with small damper performance, allowing for a larger design space and reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high damper performance is used to reduce vibration transmissibility in electrified vehicles, then vibration insulation characteristics are improved, but manufacturing cost and space requirements increase
Solution Approach 1:
The patent changes the configuration parameters of the suspension mount structure, specifically using a series connection of spring and damper with optimized stiffness and damping coefficients. This parameter optimization allows achieving effective vibration reduction with smaller, less expensive dampers compared to conventional parallel configurations
Solution Approach 2:
The patent applies different local characteristics to the spring and damper components in the series configuration, where the spring handles static load support and the damper handles dynamic vibration suppression. This localized functional division allows each component to be optimized for its specific role, reducing overall system cost and space
2Object-affected harmful factors
If high damper performance is used to reduce vibration transmissibility in electrified vehicles, then vibration insulation characteristics are improved, but required space increases
Solution Approach 1:
The patent optimizes the damping coefficient and spring stiffness parameters in the series configuration to achieve effective vibration suppression with compact damper dimensions. The mathematical modeling shows that series configuration allows smaller damper volume while maintaining vibration reduction performance
Solution Approach 2:
The patent segments the vibration suppression function between the spring and damper in a series arrangement, where the spring provides initial compliance and the damper provides targeted damping. This segmentation allows the damper to be smaller since it only needs to handle residual vibrations after spring deformation
3Object-affected harmful factors
If conventional suspension mount structure is used in electrified vehicles, then design is simpler, but vibration insulation characteristics are insufficient due to different vibration characteristics
Solution Approach 1:
The patent modifies the suspension mount structure by changing the connection configuration from parallel to series, and optimizing the stiffness and damping parameters. This parameter change adapts the suspension to electrified vehicle vibration characteristics without requiring completely new design concepts
Solution Approach 2:
The patent introduces a specifically designed spring-damper series combination as an intermediary element between the vehicle body and suspension components. This intermediary structure transforms and filters vibrations in a way that suits electrified vehicle characteristics, bridging the gap between conventional suspension design and new vibration requirements
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 proposed suspension mount structure significantly reduces vibration transmissibility across various frequencies with minimal damper performance, optimizing design space and reducing vehicle manufacturing costs.
Implementation Method 1
the suspension includes a spring and a damper, wherein the spring and the damper are connected in series to each other and are connected in series to the upper structure
Implementation Method 2
the suspension includes a spring and a damper, wherein the spring and the damper are connected in series to each other
Data Source
AI summary
Disclosed are a suspension mount structure of an electrified vehicle and a method for evaluating performance thereof. The suspension mount structure includes an upper structure of the electrified vehicle; and a suspension on which the upper structure is mounted, wherein vibration occurring at a location below the suspension is transmitted to the suspension via an axle and then is transmitted to the upper structure via the suspension, wherein the suspension includes a spring and a damper, wherein the spring and the damper are connected in series to each other and are connected in series to the upper structure.