Centrifugal Pendulum Radial Force Element
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Solution Overview
Problem
Centrifugal pendulums in vehicle drive trains face limitations in increasing restoring torque due to space and weight constraints, making it difficult to effectively dampen higher vibration modes.
Innovation Solution
Incorporating a radial force element, such as a spring element, that applies a radial force outward to the pendulum mass, increasing the restoring torque without requiring additional space by integrating the radial force element into the guide of a central connecting element or using multiple spring elements to couple pendulum masses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the pendulum mass is increased to dampen higher vibration modes, then the restoring torque is improved, but the weight increases which is not acceptable in modern automobiles
Solution Approach 1:
The patent changes the force parameters by introducing a radial force element that applies an additional radial force to the pendulum mass. This modifies the force balance equation, allowing the restoring torque to be increased without proportionally increasing the pendulum mass. The radial force element effectively changes the system's force characteristics to achieve higher restoring torque with the same mass.
2Force
If the oscillation angle is increased to dampen higher vibration modes, then the restoring torque is improved, but the installation space increases which is not acceptable in modern automobiles
Solution Approach 1:
The patent introduces a radial force element that modifies the force characteristics of the pendulum system. This allows the restoring torque to be enhanced without requiring an increased oscillation angle, thereby maintaining the same installation space requirements while achieving better vibration damping performance.
3Force
If a radial force element is added to increase restoring torque, then the vibration damping is improved, but the device complexity increases
Solution Approach 1:
The radial force element is designed to serve multiple functions: it applies the necessary radial force to increase restoring torque, guides the pendulum mass movement, and can be integrated with existing pendulum components. This multi-functionality approach minimizes the increase in device complexity while achieving the desired force enhancement.
Solution Approach 2:
The patent integrates the radial force element with existing pendulum components such as the guide structure or connecting elements. By merging the radial force application function with existing structural elements, the overall device complexity is minimized while still achieving the increased restoring torque.
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 allows for a space-neutral increase in restoring torque, effectively damping vibration modes in a motor vehicle's drive train, enhancing the suppression of unwanted vibrations.
Implementation Method 1
at least one pendulum mass (4) has a radial force element (11) via which a radially outward acting radial force (FR) can be applied to a center (7) of the pendulum mass (4)
Implementation Method 2
the radial force element (11) has at least one spring element (27)
Implementation Method 3
the force F is the centrifugal force exerted by the pendulum mass. In a centrifugal pendulum according to the present invention, a radial force is applied in addition to this centrifugal force Fzf
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
Centrifugal pendulum (1) comprising a pendulum flange (5) that is rotatable about an axis of rotation (3) and a plurality of pendulum weights (4) that are distributed around the circumference and can pivot to a limited extent in relation to the pendulum flange (5), wherein at least one pendulum weight (4) has a radial force element (11) through which a radial force acting radially outwards can be applied to a centre of the pendulum weight (4) considered in the circumferential direction. The centrifugal pendulum advantageously allows a space-neutral increase in the restoring torque M of the centrifugal pendulum. This allows improved damping of vibration modes to be achieved that do not affect installation space, as is advantageous particularly when used in motor vehicles and their clutches.