How Can We Minimize The Spin Effect In Clutch Of An Automobile?

Generally speaking vehicle clutches are part of the flywheel. As such they 'smooth' the engine output. reductions in weight are quite simple when no flywheel is needed, such as on motor bikes where multiplate oil bath clutches are used.

Technically, the clutch is part of the transmission. The flywheel is connected to the pressure plate.

More info please. It seems you are speaking of dry clutch in association with manual transmission? True?

What exactly do you mean by "spin effect" as it affects plate liner? An effect on the plate lining itself? On other clutch (or drive train) components? On transmission function/shifting? What?

And since plate spin during properly operated clutching would have little, if any, effect on transmission of torque, is the point of a change in materials to lengthen the life of the clutch? Or to obtain weight savings and still realize the very long life expectancy of conventional clutches?

Is your clutch to be operated under abnormally extreme stresses?

In short, what is the existing problem, or application, you wish to solve or improve upon? Assume you already have the capital equipment for carbon fiber fabrication? But not the expertise to find the answer regarding carbon fiber...?

Thank you for helping us help you better.

What are you talking about????

Try posting a complete question or statement.

I thought the slippage to some extent was to smooth the transition between gears. If you have excessive slippage on a clutch then there is a problem with clutch. If the clutch lining were made of carbon fibers. Would get excessive wear on the steel plates(flywheel, pressure plate, or clutch plates. Harder material would create more slippage.

I'm not sure what you're asking.

An automobile clutch must have the ability to slip slightly at first engagement, but not after full engagement, or it would just slam the vehicle into movement making it very difficult to drive.

I would like to have better materials for the disc plate that would withstand this initial slippage that would extend the life of the disc.

A tougher disc plate of course would be a trade off as more of the wear would logically transfer to the flywheel or pressure plate surfaces.

Maybe the optimum combination is already in use - and possibly little room for improvement.

Racing clutches are very effective for the purpose, but are not realistic for normal use. They are designed for a very limited number of uses and are changed regularly.

Sorry forgot to sign in -- ietech here post #5

Rich

dear members

by spin effect of clutch , i mean the spining of the friction plate/clutch plate when the clutch is disengaged. due to this spin of the clutch plate, there occurs hinderence in the smooth gear shifting.so , my task is to minimize the time, to lowest possible, in which the clutch plate stops spining( or the retardation is max or the moment of inertia is minimized). in high speed motors like 1000cc bikes how is this done so that we get minimum strees on gears while shifting.

In motorcycle transmissions, there are no synchronizers

to gently decellerate the disengaged clutch as in autos.

Eg. the gears engage with a noticeable "clunk".

MC people are much more forgiving of machine harsheness than cagers.

The engagement of 1st gear early in the morning is the worst, as

you have to break the stiction of the wet clutch.

I swear that the tranny is going to self distruct under these conditions, but

my bike is 20 yrs old, and so far, is still functioning fine.

There's usually a lot of backround noise to help disguise the harshness.

This is the lightest minimal configuration of a transmission.

I'll give a couple of motorcycle examples

http://www.rekluse.com/

on racing street bikes, you let off the throttle or interupt the ignition momentarily & just shift. No clutch at all. skilled car racers do the same thing [speed shifting].

The case you are discussing, the clutch is only able to stop spinning when the transmission is in neutral [between gears].

if you are trying to smooth shifting & minimize stress to the gears, you need to match the speed of the motor & transmission, as quickly as possible, a slipping clutch will help, achieve this match.

may be encoders & software [electronics]

I think I understand what he is trying to do, he wants to reduce the weight (and therefore the stored energy) in the part of the clutch that is permanently attached to the gearbox side, so as to stop the "Clunk" - as in Motorcycle clutches.

The best method I have seen is the VW method which has a special sequential gearbox with 2 clutches (available on many models), but only one is actually driving at any one time.

I am sure that you can find some stuff on the web about it, but as it is fully patented and protected, I do not think that there is any commercial value for you in there.....