Torque Converter Stator Control for Vibration Damping
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Solution Overview
Problem
Existing torque transmission devices face challenges in effectively managing vibrations and torque amplification due to the rigid connection of the guide wheel to the housing, which leads to excessive torque at the turbine wheel and limitations in vibration damping within the housing.
Innovation Solution
The guide wheel is designed to rotate relative to the housing, connected to a stator shaft actuated by an actuator, allowing for independent vibration damping outside the housing using a torsion damper, and a power splitting device that creates anti-resonance between power branches to eliminate vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the guide wheel is firmly connected to the housing, then structural stability is improved, but torque amplification becomes excessive and vibrations increase
Solution Approach 1:
The guide wheel is decoupled from the housing and connected via a stator shaft that can rotate, transforming the static rigid connection into a dynamic flexible connection. This allows the guide wheel to move relative to the housing, reducing torque amplification and vibrations while maintaining structural stability through the coupled-stator-actuator system.
2Volume of moving object
If a vibration damping device is arranged inside the torque converter housing, then space utilization is improved, but the device is subject to centrifugal force and absolute speed influences reducing damping effectiveness
Solution Approach 1:
The vibration damping device is extracted from inside the torque converter housing and arranged outside on the transmission side. This removes the damping device from the rotating reference frame, eliminating the negative influences of centrifugal force and absolute speed on damping effectiveness, while the power splitting device enables compact integration.
Solution Approach 2:
The damping device is moved from the radial dimension (inside the rotating housing) to the axial dimension (outside on the transmission side), changing the reference frame from rotating to stationary. This dimensional transition allows the damping device to operate in a non-rotating environment, improving reliability.
3Object-generated harmful factors
If the guide wheel is decoupled and connected via stator shaft to actuator, then vibration damping effectiveness is improved, but device complexity increases
Solution Approach 1:
The stator shaft serves multiple functions: it connects the guide wheel to the housing, transmits torque, and enables relative rotation for vibration damping. The actuator provides both torque input and controlled decoupling. The power splitting device integrates multiple planetary gear sets that perform both power transmission and vibration isolation functions, reducing overall system complexity.
Solution Approach 2:
The stator shaft acts as an intermediary element between the guide wheel and the housing, providing a controlled connection that allows relative movement while transmitting torque. The actuator serves as a mediator that can apply torques to the stator shaft to counteract vibrations. This intermediary approach enables vibration damping without requiring complete decoupling, maintaining structural integrity while reducing harmful vibrations.
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 configuration reduces vibrations and torque amplification by allowing the guide wheel to move relative to the housing, enabling effective vibration damping and torque management, resulting in improved system efficiency and durability.
Implementation Method 1
a vibration damping device (18) which is arranged outside the housing (19) of the torque transmission device (17) on the transmission side
Implementation Method 2
two power branches can be created by means of a power splitting device, so that the oscillating power induced in one branch by means of the actuator (15) by means of the anti-resonance known from the prior art with the undamped branch allows the oscillations introduced to be almost completely eliminated
Implementation Method 3
hydrodynamic power transmission is possible by accelerating a liquid, in particular an oil, from the blades of the impeller to the turbine wheel
Implementation Method 4
The working fluid can be supported on the vanes of the diffuser and thereby cause a back pressure, so that the vanes of the turbine wheel have an excessive torque
Data Source
Figure 1~2
AI summary
The invention relates to a torque-transmitting device (1, 17) comprising a torque converter (2) which is partially arranged inside a housing of the torque-transmitting device (1, 17) and has a pump wheel (4), a turbine wheel (5) and a guide wheel (6), the guide wheel (6) being connected to a stator shaft (14) that can be rotated in relation to the housing of the torque converter (2), and an actuator (15) being coupled to the stator shaft (14) and provided in order to exert torque on the guide wheel (6) by means of the stator shaft (14).