Torque Transmission Layout With Centrifugal Pendulum Damping
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Solution Overview
Problem
Existing torque transmission devices in motor vehicle drivetrains face challenges in reducing torsional vibrations and optimizing axial installation space.
Innovation Solution
A torque transmission device with a torsional vibration damper, including a centrifugal pendulum, is designed to efficiently reduce torsional vibrations while minimizing axial installation space by utilizing a K0 clutch and a P2 hybrid arrangement, featuring a centrifugal pendulum mass arranged radially within and outside the conversion unit, and incorporating a torque converter lock-up clutch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a centrifugal pendulum is arranged radially inside the rotor, then torsional vibrations are reduced, but axial installation space increases
Solution Approach 1:
The damper mass is positioned radially outside the rotor instead of radially inside, changing the spatial arrangement from a radial configuration to one that utilizes the radial space outside the rotor. This dimensional repositioning allows the torsional vibration damping function to be maintained while reducing axial installation space requirements.
Solution Approach 2:
The damper mass is arranged in a nested configuration where it is positioned radially outside the rotor but axially within the same housing structure. This nesting approach allows the damping mechanism to be integrated into the existing powertrain layout without requiring additional axial space, effectively placing one component (damper mass) in relation to another (rotor) in a space-efficient manner.
2Productivity
If the damper mass is arranged radially inside the rotor, then the torsional vibration damper operates efficiently, but the axial installation space increases
Solution Approach 1:
The damper mass is repositioned from a radial arrangement inside the rotor to a radial arrangement outside the rotor. This dimensional change maintains the effectiveness of the centrifugal pendulum mechanism in counteracting torsional vibrations while significantly reducing the axial space required for the damper assembly.
Solution Approach 2:
The pendulum mass is designed with a specific moment of inertia and is arranged to oscillate in response to torsional vibrations. By positioning the mass radially outside the rotor, the system maintains its dynamic damping capability while optimizing the spatial configuration to reduce axial installation space.
3Object-affected harmful factors
If a conventional torsional vibration damper is used, then torsional vibrations are reduced, but the device complexity increases
Solution Approach 1:
The torsional vibration damper is integrated with the torque transmission device by positioning the damper mass radially outside the rotor within the same housing. This merging of functions allows the damping mechanism to be combined with the existing torque transmission components, reducing overall device complexity while maintaining vibration reduction effectiveness.
Solution Approach 2:
The housing structure serves multiple functions: it contains the rotor, supports the damper mass radially outside the rotor, and provides the mechanical linkage for torque transmission. This multi-functional design eliminates the need for separate damping housings or additional structural components, thereby reducing 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
The solution effectively reduces torsional vibrations and optimizes axial installation space, enhancing the efficiency of the powertrain by integrating a centrifugal pendulum mass and a torque converter lock-up clutch.
Implementation Method 1
A torque transmission device with a torsional vibration damper, including a centrifugal pendulum
Implementation Method 2
centrifugal pendulum mass arranged radially inside or radially outside the conversion unit
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a torque transmitting device (10) for a drivetrain for transmitting a drive torque to an output element, the device having: an electric motor (14) with a conversion unit (20), which comprises a stator (22) and a rotor (26) that is rotatable relative to the stator, for converting electrical energy into mechanical energy; and a torsional vibration damper (70, 76) with a damper mass (74, 80) received on a damper mass support (72, 78) such that the damper mass can be deflected to a limited extent against the action of a restoring force, the damper mass (74, 80) being arranged so as to overlap radially with the conversion unit (20).