Longitudinal Drive Unit Mounting for Vibration Damping
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Solution Overview
Problem
Existing vehicle drive unit mounting technologies face challenges in balancing acoustic requirements for soft damping with vibration comfort needs, leading to unwanted noise and vibrations due to conflicting goals between damping and rigidity, particularly evident in engine stuttering issues.
Innovation Solution
The implementation of at least three vibration-damping elements, including an additional spring or damping element aligned predominantly in the vehicle's longitudinal direction, allows for adjustable rigidity and damping specifically in the longitudinal direction, independent of other directions, thereby addressing the conflict between acoustic and vibration comfort requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If active bearings with actuators are used to dampen vibrations, then vibration comfort improves, but device complexity increases due to additional components
Solution Approach 1:
The mounting devices utilize passive vibration damping through strategically positioned vibration-damping elements rather than active control systems. The damping effect is achieved through the inherent mechanical properties and geometric arrangement of the elements, eliminating the need for actuators, sensors, and control electronics while maintaining vibration comfort.
Solution Approach 2:
The invention extracts and eliminates the complex active control components (actuators, sensors, hydraulic pumps) from the mounting system. Instead, it uses a simplified passive system with vibration-damping elements whose damping characteristics are determined by their mechanical design and positioning, achieving vibration comfort without device complexity.
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 effectively reduces unwanted vibrations and noise by providing precise control over rigidity and damping in the longitudinal direction, minimizing interference with vertical direction vibrations, thus enhancing overall vibration comfort and acoustic performance.
Implementation Method 1
at least three vibration-damping elements (2, 3, 4) are arranged for mounting the drive unit (1) to the vehicle body (5)
Implementation Method 2
an additional spring and/or damping element is arranged between the drive unit (1) and the vehicle body (5)
Data Source
Figure 1~3
AI summary
The invention relates to a fastening system for fastening a drive unit (1) to a vehicle body, comprising at least three vibration-damping elements (2, 3), wherein at least one additional spring element and/or damping element (4) for mounting the drive unit is arranged on the vehicle body. The additional spring element and/or damping element (4) is arranged between the drive unit and the vehicle body in such a way that the main effective direction of the additional spring element and/or damping element extends substantially in the vehicle longitudinal direction (L).