Does the LC can have a self-energising clutch?
Can anyone explain how such a clutch works?
Can anyone explain how such a clutch works?
Self energising clutch
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Haroldsenior
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Not sure where the name comes from but Vincents have a "pilot" single plate. that when first released acts to bring the main centrifugal clutch into action. This element is a pair of "shoes" acting on a drum. The more torque the more grip. Apart from the "anti hopping" device the LC has a perfectly normal, wet multi, very sticky!!! clutch.
I believe that it is just another term for a 'self servoing' clutch, so if it was a drum clutch then I could understand it but as you say it appears to be a simple wet clutch. I ask because some have said that it is a self energising clutch as people have said exists on the 1600GT etc.
its buried in the bmw literature which accompanied the water GS's launching.
ie , the slipper clutch AND the self energizing clutch.
the self energizing clutch feature was paired to a comment about lightened clutch lever effort.
so , putting two and two together : its probably a self-locking clutch of some sort (ie , engagement ramps in the clutch to tighten the hold on the clutch plates when torque is applied). This probably allows weaker clutch spring to be used hence the very light clutch pull.
hope this helps
ie , the slipper clutch AND the self energizing clutch.
the self energizing clutch feature was paired to a comment about lightened clutch lever effort.
so , putting two and two together : its probably a self-locking clutch of some sort (ie , engagement ramps in the clutch to tighten the hold on the clutch plates when torque is applied). This probably allows weaker clutch spring to be used hence the very light clutch pull.
hope this helps
Helps a bit thanks, but I was looking for a detailed technical explanantion as to how this works with motorcycle multiplate wet clutch. I haven't been able to find anything particularly illuminating by searching the web either which is unusual.
Is there any videos of the engine broken down into pieces as it would normally be obvious if there were any ramp mechanisms built into the clutch.
The reason for wanting to understand how it works is that it may give some insight to why this clutch sometimes has excess drag.
Deleted account 211025001
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But.....................I thought all the cltuch and gear change issues were down to the fact that all the riders having issues were not as good a rider as you. Blip the throttle on down changes, that's all that's needed
My understanding is the 'self energising' clutch is just WMB marketing bollox for the fact that a slipper clutch (as already explained) will often make clutch action lighter. KTM claim exactly that for the slipper clutch on the 1190 but without the additional marketing bollox.
..............all other manufacturers seem to be able to make/fit slipper cltches without any issues.
Andres
Didn't know the clutch on the 1200wc had excess drag....If you're having trouble with some of your gearchanges do a search,there's a bloke on here that has got it all sorted just using technique.
Steve
It does have a little excess drag causing the clonk into first - normal mechanical sympathy of blipping on downshifts smooths it all out beautifully for most people - a few people still have issues.
Does anyone on here know the principles of a 'self energising' clutch on a motorcycle and can point me to any technical literature explaining how it works - I understand the drum brake thing, was just wondering how this was supposed to work with a multiplate wet clutch??????????
Will
I've seen some aftermarket Harley clutches that use a ball and ramp mechanism to put extra pressure on the clutch as the revs rise using centrifugal force to assist the springs , this allows softer springs which give a lighter pull at the lever without causing clutch slip, or allows more power to be transmitted if you use the standard springs.
Seems like the amount of knowledge about self-energising clutches is pretty sparse (apart from the brake type). I saw something on the SAE website but you had to pay for the papers 
I'm not talking about the normal ball and ramp on the release mechanism but there is complete aftermarket clutches available with centrifugal assistance.
it looks like Harley even make their own version. http://www.harley-davidson.com/store/se-variable-pressure-clutch
Maybe there is something similar in the LC clutch? Or maybe it is something to do with the way the oil film and plates friction increases as the revs rise. Need an exploded view of the clutch or someone with some inside information to explain it to me.
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