Integrated Powertrain Mount Tuned Mass Damper for NVH Control
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Solution Overview
Problem
Existing drivetrain mount assemblies in vehicles fail to effectively mitigate noise, vibration, and harshness (NVH) issues due to vibration transmission, requiring external tuned mass dampers that add complexity and space constraints.
Innovation Solution
A tuned mass damper assembly is integrated into the drivetrain mount by molding an elastomeric body around a mass element attached to the mount, directly bonding it to the vehicle frame, allowing for optimized vibration damping without separate external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If external tuned mass dampers are used to control NVH problems, then vibration damping performance is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines the tuned mass damper functionality directly into the mount assembly by integrating a mass element within the elastomeric material. This merging eliminates the need for separate external TMD devices and their associated fasteners, thereby reducing assembly complexity while maintaining vibration damping performance.
Solution Approach 2:
The mount assembly is designed to serve multiple functions: it provides mechanical mounting support and simultaneously functions as a tuned mass damper through the integrated mass element. This multi-functionality reduces the overall number of components needed in the system.
2Object-affected harmful factors
If external tuned mass dampers are attached to mounts, then vibration damping is improved, but manufacturing steps and assembly time increase
Solution Approach 1:
The mass element is integrated within the elastomeric material of the mount assembly, creating a single unified component. This eliminates the need for separate assembly steps involving external TMD attachments and fasteners, thereby improving manufacturing efficiency and reducing assembly time.
Solution Approach 2:
The mass element is pre-positioned and integrated within the elastomeric material during the manufacturing process. This preliminary integration ensures that the vibration damping functionality is already built into the component before installation, eliminating the need for additional assembly steps at the installation stage.
3Object-affected harmful factors
If separate TMD devices are used, then vibration control is improved, but space requirements and vehicle weight increase
Solution Approach 1:
The mass element is integrated within the elastomeric material of the mount assembly, creating a single unified component. This merging eliminates the need for separate external TMD devices, thereby reducing the overall space requirements and vehicle weight while maintaining vibration control performance.
Solution Approach 2:
The mass element is nested within the elastomeric material of the mount assembly, similar to a nested doll structure. This nesting approach allows the TMD functionality to be contained within the existing mount structure, minimizing additional space requirements and weight.
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 solution reduces NVH issues by directly attaching a tuned mass damper to the drivetrain components, minimizing resonance frequencies and enhancing ride comfort without adding manufacturing complexity or space requirements.
Implementation Method 1
molding an elastomeric body around the mass element and to the wall to bond the mass element to the wall
Implementation Method 2
A tuned mass damper assembly is integrated into the drivetrain mount by molding an elastomeric body around a mass element attached to the mount, directly bonding it to the vehicle frame, allowing for optimized vibration damping
Data Source
AI summary
A method is disclosed for providing a tuned mass damper for a powertrain component. The method includes the steps of providing a mount adapted to be attached to the powertrain component; assembling a mass element to the mount; and molding an elastomeric body around the mass element to bond the mass element to the mount. The tuned mass damper assembly for a drivetrain component is also disclosed that may be attached to a mount having an opening that extends through the mount or a housing portion provided on the mount The molded elastomeric body integrally attaches the mass element to the mount. Alternatively, the tuned mass assembly may be bonded to a plate that is attached to a motor retention element.