Multi-Plate Clutches – Explained

Multi-Plate Clutches – Explained


100 thoughts on “Multi-Plate Clutches – Explained”

  1. Engineering Explained

    It's the difference in RPM between the transmission and engine that matter, so if they match speeds it doesn't matter if the RPM is really high.

  2. Wet clutches cause power loss, generally not much, but some, some wet clutches will even slip under heavy load. Most semi trucks use a dry clutch. It's not uncommon for semi trucks to still have cable actuated clutches now days either.

  3. So what did you do that was car related?
    Or as a mechanical engineer your college/university ended up covering that topic?

  4. Engineering Explained

    I did a generic ME degree, as that is what my university offered. I simply learn about cars in my own time. More info on my website howdoesacarwork(dot)com.

  5. Engineering Explained

    A surface for the clutch plate to press against, in order for the two shafts to rotate together. The clutch disks rotate with one shaft, the friction plates with the other.

  6. It's cool how you explained the advantages of the dry clutch because I own and race a former Jakub Smrz WSBK-spec 1198RS and I always wondered what the advantages were of having a dry clutch. That bike went over 200 mph at Daytona last year and has over 106 ft-Lbs of torque. Even with launch control and such we don't have to change out the clutch pack that often. Having a smooth rider helps (not me)! Haha!

  7. I have learned so much from your videos tonight. Thank you for the great explanationsโ€”I have zero experience in engineering, but I had no trouble understanding any of what you've presented in the 4 videos I've watched so far. Great job making complex concepts simple enough for people like me to understand. Thank you!

  8. Yes sir, thank you for this – better than any lecturer I've had; concise, accurate and well-diagrammed explanations!

  9. I don't get it. So the spring press the friction plate and the friction plate press the transmission clutch disk and so on? So what return the friction disk and transmission clutch disk back when the spring released/the pedal pressed? Also what's max the clearance?

  10. Engineering Explained

    Check out my video "clutches – explained" for a better description of the pressure mechanism, I also have a video "performance clutch" where I show the actual clutch. Don't know about clearances.

  11. You already answered your own question, you just didn't realize it. Because it's spring loaded, it automatically "retracts" itself. Think of it as compression and rebound.

  12. Perfectly explained man! Ijust have to Qs. 1) Why are there 2 different diameters (inner & outer )? 2) What kind of spring is used to release the pressed components?

  13. Engineering Explained

    1) if there were not an inner diameter (the disk was a clutch material all the way to the center) the center would not wear much, and the edges would wear quite a bit, from the difference in speed.
    2) A diaphragm spring, check out my video "clutches – explained" or "performance clutch" for an actual visualization.

  14. You explain things in a manner that is so easy to comprehend. And I graduated high school a few decades ago. And I am a long way from engineering knowledge. Although I do have a pretty good understanding of engines and transmissions. Thank you for uploading these videos. You would make a great teacher. Have you ever thought of that as a career?

  15. if we have Max V=18 m/s and n=3000 rpm,d(out)=2d(in),Power=75kW
    how to get d(out) and d(in)

    i think d(in)=0.114m and d(out)=2*d(in)=.229m

    because V=(3.14*d(in)*n) / 60

    is it right ?

  16. Hello, excellent Video, thank you.ย 

    One question:

    Are there any dry multi-plate clutches?
    I suppose that the lubricant is needed for the friction plates to slide around on the rods…

    Even on motorcycles with wet multi-plate clutches the clutch tends to stick from time to time so I suppose on dry mp-clutches that would be a serious problem…

  17. So… in a multiplate:
    does the flywheel not actually touch any of the clutch discs?
    you said the friction plates are able to slide freely, are any of the clutch discs able to slide along the shaft's axis?

  18. Ok. I am a paramedic for the Fire Dept. here in NYC. Studied biology in college, but damn… sometimes I really wish it had been mechanical engineering. Having an "engineering explained" night.

    Your videos are awesome.

  19. Alexander Skoglund

    Great vid!
    Me and my coed are developing a product using this technique. Do you have any ide of which fiction cofficient there is on the friction plates (for dry clutches,)? And what materials the plates are made of? A good referens would be excellent as well:)

    Best regards
    Alexander

  20. I have a question regarding clutches. When we start a car, we initially press the clutch and after the engine starts, we release it slowly and simultaneously accelerate. Now, what happens sometimes is that we release the clutch without pressing the accelerator and the engine stops. Please explain the reason behind this.

  21. Would increasing the number of plates and decreasing the radii of said plates relative to the original ones also be a better trade-off due to the reduction of inertia, leading to a better throttle response? Just a thought since the radius has a much greater effect than mass when it comes to rotating disks.ย 

  22. The Ethicist Philosophy Show

    I've never come across any engineering teacher who can transmit as many bits of info per minute as you, clearly, and eloquently!

    Honestly, the best engineering professors I've ever come across can get the same amount of information across as you can, but generally they require a half hour to relate what you can in less than 6 minutes!

    Bravo! And thank you so much ๐Ÿ™‚

  23. Thanks for the videos!
    One thing that confused me is – why do we add area into friction force calculations? I Though friction force does not depend on area?

  24. It's like every time I want to learn something here, I have to watch another video where I'm told to watch another again.. and on and on it goes. Well, It works nevertheless. ๐Ÿ˜€

  25. I totally unerstand how it works but, my issues still remains. I dont get why I need it. Im a evo driver looking for a new clutch who never has the intentions of having more than 450ft torque and no more than 500awhp ever. Im trying to figure out what the advantage is over getting one of these insanely priced exedy twin plates vs a single plate stage 3 clutch.ย 

  26. I still think a twin carbon twin disk is better than any other multi plate or single on a 350ftlb tq up to 800ftlb tq from an engineering standpoint.

    I know one of the main issues though with carbon friction disks is that they require to be slipped to raise the friction coefficient. But daily driving especially freeway cruise and canyon racing, it might be the best option. But Im not sure on how long the friction plates will last because their are too many variables.

    On a medium torque output engine, would the service life of a carbon friction disk outlast others if driven regularly with occassional pulls?

    Were talking 350ft lbs. how can one measure the amount of torque it takes to slip a cold carbon friction disk?

  27. Thank you sir…all your videos are just awesome and they'll surely help me with my sae-baja interview….thanks and bst luck for the coming years…

  28. Why 1/8 is attached to that torque transfer Formula?
    I don't understand it.
    rearranging that formula more simply~
    t=(d1)*{N*P*pi(d2^2-d1^2)}/8
    = [(distance) *( Force )]/8
    please somebody tell me where those that 1/8 come from.
    I want to know that things
    thanks:D

  29. BluefireRedlightning

    Could anyone tell me where or how I can find out what clutch i got on my car? (Single or multiple discs)
    It's an Audi A7 Stronic . Upgrades possible for this setup?

  30. One thing I never understood: with so many things just pressing and rubbing against each other in it, why don't vehicles ever sound like an ear splitting grinding mess?

  31. You are spot on. I have a McLeod twin disc in a Gt 500 and had no idea how the internals operate. I hope you become a college professor

  32. when you come here to learn about limited slip diff. but this video is recommended before watching that and this video also has another recommended video wich I will now go to watch, to be able to understand this video, so I can understand the lsd video. crap is like high school all over again.

  33. Hey! So, you've under dry clutches you get more torque, but you stated for greater torque applications we should go with the wet ones cause of heat.. so.. over all the wet ones give more torque? Please clear that up for me.

  34. what I don't get about clutches is how they are able to not just jump from right zero into speed, but get into that gear smoothly, and even maintain a speed that is lesser than the engine speed

  35. do single disc clutch have wet and dry types too?and why cars uses single disc clutch instead of multi plate clutch?

  36. this makes me feel like i could actually get engineering for the first time in my life. and Im a poli sci major

  37. White nationalism Or nothing

    how come dry clutches in manual cars don't make noise but dry clutches in motorcycles(Ducati) are known for being noisy??

  38. You are trying to increase the torque by using multi-plate clutches but the increase in torque results in speed decrease of the shaft. Then why is it preferred?

  39. if the plates can move freely, when the clutch pedal is pressed, how do the revert to their "disengaged" position and not bump into each other? there must be some springs or something to keep them in place and away from each other, right?

  40. I have a 2014 Corvette. it tends to surge in first gear at low speeds even though I'm completely off the clutch. I have been told it is because of the twin disc clutch. Is there any truth to that?

    The surging is a common complaint with the car so I don't think there is anything wrong, I'm just curious as to why it surges at low speeds in first gear.

  41. How does a rear Haldex clutch manage front rear axle speed differences while turning without a center diff (aka Audi S3)? Thx!

  42. I've been trying to understand the DCT on the new C8 and how the clutch actually works. Thanks for demystifying this subject. I just watched the video on how the gears and layshafts are laid out. Now on to trying to find out how long they'll actually last. And how expensive they are to replace. Both may be equally terrifying. I'm assuming because of the level of torque involved, it'll be a 'dry plate' setup.

  43. I put a dual-clutch on my Civic when I turbo charged it. Six months later I switch to a 6 spline and put a 12 pound from 24 spring in my blow off valve. I couldn't handle the noise, the looks of ppl and everybody asking what's wrong with my car. I had to replace the six spline twice in 3 years though.

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