Powertrain Mounting Beam With Swing Mass for EV Vibration Filtration
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Solution Overview
Problem
Electric vehicles with electric motors experience low-level noise and vibration emissions that are still perceptible to occupants, affecting acoustic comfort.
Innovation Solution
A vehicle arrangement with transverse beam supports and vibration filtering elements, including a left and right side support with dual filtration elements, a rear support, and a swing mass, to effectively filter vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single vibration filtering element is used between the powertrain and body, then the device complexity is low, but the vibration filtration effectiveness at medium and high frequencies is insufficient
Solution Approach 1:
The vibration filtration system is segmented into multiple independent filtering elements arranged in series between the powertrain and body. Each filtering element targets specific frequency ranges, with the combination providing comprehensive attenuation across medium and high frequencies while maintaining manageable system complexity through modular design
Solution Approach 2:
The invention transitions from a single-point filtration approach to a multi-dimensional filtration system by arranging filtering elements along the powertrain mounting structure. This spatial distribution creates multiple filtration stages that work together to address vibrations across different frequency spectra simultaneously
2Object-affected harmful factors
If multiple vibration filtering elements are added to improve filtration, then the vibration attenuation improves, but the device complexity and structural complexity increase
Solution Approach 1:
The powertrain mounting structure serves multiple functions simultaneously: it provides mechanical support for the powertrain, acts as a vibration filtration system through multiple filtering elements, and functions as a noise reduction mechanism. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in overall device complexity
Solution Approach 2:
The invention merges the vibration filtration function with the existing powertrain mounting structure. By integrating filtering elements into the mounting system rather than adding separate filtration devices, the solution achieves improved vibration attenuation while minimizing the increase in structural complexity
3Object-affected harmful factors
If heavy filtration elements are used to block vibrations, then the vibration isolation improves, but the weight of the powertrain assembly increases
Solution Approach 1:
The invention changes the parameters of the filtration elements to optimize the balance between vibration isolation and weight. By selecting filtering elements with appropriate material properties and dimensions that target medium and high frequencies specifically, the system achieves effective vibration isolation without requiring excessively heavy components
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 arrangement provides enhanced acoustic comfort by reducing medium and high-frequency vibrations and noise emissions, improving passenger experience while maintaining a simple and economical attachment of the powertrain to the vehicle body.
Implementation Method 1
a left side support attached to the powertrain and the left side member, the left side support comprising a first vibration filtering element and a second vibration filtering element
Implementation Method 2
The arrangement provides enhanced acoustic comfort by reducing medium and high-frequency vibrations and noise emissions
Data Source
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AI summary
Arrangement comprising vibration filtering elements between a body and a vehicle powertrain. The invention relates to an arrangement (6) for a vehicle comprising a body (2) and a powertrain (5), the arrangement (6) comprising a left side member (4L) and a right side member (4R), a left side support (20) attached to the powertrain (5) and the left side member (4L) and a right side support (40) attached to the powertrain (5) and the right side member (4R), a beam (10) extending transversely or substantially transversely, the beam (10) being attached to the left side support (20) and the right side support (40), a rear support attached to the powertrain (5) and the body (2), the rear support comprising a first vibration filtering element and a second vibration filtering element, at least one element (8) of such a vehicle being arranged on the beam (10) to act as a swing mass.