Sprung Centered Clutch Disk vs Solid
Sprung Centered Clutch Disk vs Solid
(OP)
You guys were so helpful with my last driveline question that I thought I'd toss another one out to the collective group...
WRT racing clutch disks and a single mass flywheel...
This

vs This

Are sprung centered clutch disks primarily for the reduction of noise? (chatter)
There are some who say it will reduce the stress to the driveline (under power) but I'm skeptical of this. The springs in a disk dont appear to be strong enough to counter (soften) the torque and inirtia of the engine/flywheel... which make me think they are for noise or vibration reduction only...basically at idle and very low RPM/low power output.
For the purposes of answering this question lets disregard standing starts and concentrate on engagement where the engine is operating at or near it's torque peak after upshifts or at other RPMs on downshifts where the driver may be matching revs anywhere in the range.
Thanks!
WRT racing clutch disks and a single mass flywheel...
This
vs This
Are sprung centered clutch disks primarily for the reduction of noise? (chatter)
There are some who say it will reduce the stress to the driveline (under power) but I'm skeptical of this. The springs in a disk dont appear to be strong enough to counter (soften) the torque and inirtia of the engine/flywheel... which make me think they are for noise or vibration reduction only...basically at idle and very low RPM/low power output.
For the purposes of answering this question lets disregard standing starts and concentrate on engagement where the engine is operating at or near it's torque peak after upshifts or at other RPMs on downshifts where the driver may be matching revs anywhere in the range.
Thanks!





RE: Sprung Centered Clutch Disk vs Solid
RE: Sprung Centered Clutch Disk vs Solid
I can't help thinking they would also soften engagement of the gears while shifting. "Big rigs" have a similar spring arrangement. Even motorcycles have these, usually in the form of several rubber cushions in the clutch hub.
RE: Sprung Centered Clutch Disk vs Solid
Hub springs are to absorb drive line shock and slight misalignment.
Regards
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RE: Sprung Centered Clutch Disk vs Solid
Cheers
I don't know anything but the people that do.
RE: Sprung Centered Clutch Disk vs Solid
- Bill
RE: Sprung Centered Clutch Disk vs Solid
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Sprung Centered Clutch Disk vs Solid
RE: Sprung Centered Clutch Disk vs Solid
For the springs to dampen harmonics they would have to operate in a slightly compressed state at all times. And for a simple spring to do this the engine would have to output a nearly constant torque at all times. The damper and flywheel mass are there to dampen engine harmonics.
ISZ
RE: Sprung Centered Clutch Disk vs Solid
I am in no way, shape or form a professional in drive-train technology. However, I have had the misfortune of running an un-sprung clutch in one of my own vehicles.
To the best of my knowledge, and the reason for my purchasing and installing said un-sprung clutch, is that un-sprung clutch's work better with drag slicks. They launch more consistently.
They do however also deliver 100% of the engines torque and vibrations immediately upon engagement.
I.E. un-sprung clutch's are far more likely to contribute to expensive repair bills than standard sprung ones. Just my 2 cents.
RE: Sprung Centered Clutch Disk vs Solid
RE: Sprung Centered Clutch Disk vs Solid
And then, he showed me a box full of trashed input shafts. It's hard to argue with experience.