Clutch Disk Torsional Damper With Pendulum Decoupling
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Solution Overview
Problem
Existing clutch discs with torsional vibration dampers, particularly those using centrifugal pendulums, suffer from increased mass moment of inertia which worsens clutch engagement acoustics, leading to disturbing metallic noises during rapid engagement.
Innovation Solution
A clutch disc design featuring two spring dampers connected in series and a centrifugal pendulum with a flange decoupled from the hub, allowing torque-dependent linkage changes via springs and lugs, reducing the total mass moment of inertia to that of a conventional clutch disc.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centrifugal pendulum is connected to the hub via its flange, then torsional vibrations are dampened, but the moment of inertia of the transmission input shaft increases, worsening engagement clunk
Solution Approach 1:
The centrifugal pendulum is extracted from the hub connection and relocated to the flange, separating its vibration damping function from the hub's rotational inertia. This extraction allows the pendulum to dampen torsional vibrations in the clutch disc without adding to the transmission input shaft's moment of inertia, thus resolving the contradiction between vibration damping and engagement clunk reduction.
Solution Approach 2:
The flange serves as an intermediary element between the centrifugal pendulum and the clutch disc system. By connecting the pendulum to the flange rather than directly to the hub, the flange mediates the interaction, allowing the pendulum to perform its damping function while isolating it from directly increasing the transmission input shaft's moment of inertia.
2Power
If soft springs of the pre-damper are compressed during rapid clutch engagement, then torque is transmitted, but the transmission input shaft and components are strongly accelerated, causing multiple impacts and metallic noises
Solution Approach 1:
The centrifugal pendulum is pre-positioned on the flange with its damping mechanism ready to act. During rapid clutch engagement, as torque is transmitted through the pre-damper's soft springs, the pendulum immediately begins damping torsional vibrations in the clutch disc, preventing the strong acceleration and subsequent impacts that cause engagement clunk noise.
Solution Approach 2:
The centrifugal pendulum provides beforehand cushioning by being预先 positioned to dampen torsional vibrations before they can propagate to the transmission input shaft and cause harmful impacts and noise during rapid clutch engagement.
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 design improves acoustic properties by reducing the mass moment of inertia and minimizing clutch engagement impacts, achieving satisfactory acoustics even with increased torque.
Implementation Method 1
In these dampers, centrifugal weights are displaceably arranged on a flange. These weights absorb energy during torsional vibrations and release it again after a time delay, thus damping the vibration.
Implementation Method 2
These weights absorb energy during torsional vibrations and release it again after a time delay, thus damping the vibration.
Implementation Method 3
a spring damper is arranged between the friction linings and the hub, which transmits torque from the friction linings via two adjacent cover plates to a spring, and the torque is then transmitted from the spring to a flange connected to the hub
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a clutch disk (101) comprising a torsional vibration damper (105) which has two spring dampers (102, 103) connected in series, and comprising a centrifugal pendulum (104) which has a hub (112) and a flange (111) arranged on the hub, and side discs (110) are arranged on both sides of the flange (111), wherein the side discs (110) are connected radially outside to friction linings (108), wherein a first spring damper (102) is arranged as a main damper between the side discs (110) and the flange (111) in a torque-transmitting manner, and a second spring damper (103) is arranged as a pre-damper between the flange (111) and the hub (112) in a torque-transmitting manner, wherein the centrifugal pendulum (104) has at least one flange (114) and centrifugal weights (115) arranged displaceably thereon, wherein the at least one flange (114) of the centrifugal pendulum (104) is hinged to an element of the clutch disk (101) upstream of the second spring damper when viewed in the direction of torque.