How A CVT Works by TEAM Industries.mov
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- Опубликовано: 25 сен 2011
- TEAM has received a lot of requests to explain how a CVT works, here is a good video showing the basics of CVT. In the future we will be posting more videos explaining some of our innovations to the basic design. Take a look and let us know what you think.
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Other videos show abstract diagrams but this one gives me actual visuals of the workings, in real time. This video in 30 seconds explained better than the 5 other math-laden and flowchart soaked videos I watched prior.
Someone finally showing the real thing working! Kudos!
Nice informative and easy to understand video. Good job guys.
BTW I have a Honda Silverwing Megascooter that is 600cc and makes 50 hp. So far it has been 14,000 trouble free miles. The Kevlar belt CVT in it produces great acceleration and also 52 mpg. Honda did a super job of matching it to the engine. It gives an instant downshift when ever you call for power and smoothly upshifts for cruising.
Kevlar and rubber belt CVT transmissions are reliable up to around 100 hp. Above that requires a steel belt and computer hydraulic control.
Modern snowmobiles these days are running upwards of 200hp with no problems, still on CVT with belt. They can do more than 100 HP. Even powerful ATV's are up there on power numbers.
This is the best video showing and explaining how these CVTs work. It's worth noting that although new to domestic automobiles, this is relatively "ancient" technology. It has been used on farm equipment for decades, and if you can find a Popular Mechanics from the 1960s, there'll probably be an ad in the back for a "minibike" that has this setup. In fairness, those older setups usually had a separate clutch to totally disengage the drive from the driven side. On industrial equipment it was likely an idler for the belt. On the minibikes it was probably a centrifugal clutch. In most cases, the torque/rpm could be tweaked by adjusting or swapping the fly weights.
Nissan should see this.
Interesting to go back to this video and seeing how far CVTs have come.
awsome vid. I understood how it works but I appreciate actually seeing the system in operation over an animated video, drawings or hearing someone explaine it.
I am a youth snowmobile safety course instructor in New York State and commend you highly in this video. I hope you have no objections to my using this in my classroom instruction on the theory and operation of a snowmobile drive train. It is, by far, the best video I've seen on the basic function of a CVT system! Only too bad you didn't have the arrangement as we find on an actual snowmobile - drive clutch on the left and driven clutch on the right; so that it is what the kids would actually see under the cowl of their own snowmobile. I will merely explain during my tutorial of the actual difference.
What's crazy is this technology is from the 1920's! The factory equipment was driven by belts attached to cones on a connecting rod in the ceiling. The belt would move on the cones to vary torque and speed. Pretty phenomenal how we take old technology and apply it in new ways!
Older than that. 1870s
Thanks for the great video explanation. I had to watch carefully to see exactly how it works but now I get it! Great piece of engineering and it seems quite basic [in principle and operation]. Cheers.
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ruclips.net/video/rWgM8UlgaAQ/видео.html
Very well made and informative video. It's almost impossible to explain without that live footage... Thanks
Learned so much by watching this video and reading comments. Thanks.
I had this on a mini bike as a kid - only my dad called it a torque converter for some reason. I believe they were common on snowmobiles. My Subaru Forrester has a cvt and it is decent.
45 years ago I had a mini bike with a "torque converted" which was a basic version of these, loved it
I think you're talking about a torque converter and that's what takes the place of a clutch in every automatic transmission car...
Good.
@@frederickschulze8014yes, but there are small engines such as chain saws that will only engage the chain when applied throttle because they have a built in clutch system. Therefore can be passed on by being called a tourqe converter since it is litterly doing the same job
@@musicrevelation2023 Right, a clutch does the same job as a torque converter. This video was about CVTs, not clutches.
@@frederickschulze8014 yes but you were talking about how a vehicle only has a tourqe converter and it doesn't. Most chain saws have a similar if not the exact same set up and a lot of other small engines
Best explanation I’ve seen on RUclips.
You make a great point. I too am a fan of manual transmissions. They both have their place I suppose.
> "CVT are cost effective and maintenance is relatively easier."
It would be interesting if you could provide more evidences to support this statement.
Yeah they say that...... but everything in your car needs to be taken to the dealer and is anti diy now days cause of greed.
"Cost Effective" common people that grey area language can pretty much be nissan literally saying 'its more cost effective to sell you this cheap fucking bullshit instead of designing a transmission that works'
And reletively easier maintenance just means they have an esier time charging you 500 to 1000 bucks to do a cvt fuild change because you either wont have a dipstick.... or it will say some bullshit like " fluid made to last life of vehical" (which is the automatics new version of forced obsolescence)
And the whole while , these use and throw away and buy another one instead of building cars that can be maintained is the industry just perpetuating their money generation and securing more sales.
AND THEBEST PART, the fed and epa are breathing down everyone’s necks saying “more environmentally friendly cars that get better and better mpg”........ how is making gas efficient cars that just fall apart quickly good for the environment??????? The fucking Hippocrates all around the consumers (us) are ruining the cars the consumers rely on.
Eh, 500 bucks? I paid like a hundred and fifty to change the fluid. Sure the fluid was not original, but who cares?
@@rosiemccattail6350 i worked at a nissan dealership for 2 years working mostly in the PM section (preventive maintenance) so all i helped with was fluid changes..... they dont change much fluid ( about half or 2/3rds)
So yeah, maybe you paid 150 for the cheaper fluid.... but they prolly dident even change most of the fluid.
It's the 8-track of transmissions.....lol
"Team Industries CVTs - We cut the heart and soul out of the driving experience"
could be their motto.
Lol
If the 8-track was a non-perfected amazing use of engineering. That's like in the 1920 blaming automatic transmissions, saying "Oh well they can't shift as good as I can, and get horrible gas mileage, so therefore they'll never work." When somewhere around 92% (don't quote me don't know exact numbers) cars today use auto trannys.
Hopefully it is and disappears just like 8 tracks did.
@@mrofnocnon I certainly hope it does not, because it has a chance to be a lot more efficient then the automatic transmission. Meaning we can gas cars around for longer before the government bans them. And I like gasoline cars.
I only recently found this video, and had been wondering how a CVT worked for some time. This video is good at explaining it.
Some notes: a) I would have expected a CVT to be computerized rather than using an entirely mechanical system to determine ratio. b) What I didn't get about CVTs specifically, prior to this, was how the pulleys changed size, as I didn't even think of the idea of the belt being gripped by the sides like that. It seems like something that wouldn't be able to handle the load of a 100+ horsepower car engine, but apparently it does. (Though judging by some comments below, it doesn't handle it for as long as a normal automatic or manual transmission.)
This CVT is used on snowmobiles, atvs, and scooters. Cars do use electronic ones with simulated shifting so you can “hear” the engine shifting, which is why they are less reliable
I had this type of setup on a Heathkit Bonnie bike that my dad modified in the 60’s and it worked great and I could outrun those Honda 50’s and 70’s. Just wasn’t anywhere near as cool. I rode every day for about 3 years and never had an issue with it. I can’t imagine trying this on a car with a belt. Too much to expect. I looked at the new Infinity cars that have this but I’m not sold on it. They claim it is great but I’ll wait a year or more before I’m convinced. Still a great idea that has taken way too long to perfect in the car industry.
Just what I need...my transmission run by a rubber band.
thats not a rubber band, stupid. Its a carrier belt.
@@anderstermansen130 it's still a shitty and expensive transmission
@@musicrevelation2023 cars use Steel belts unlike what the model uses
@@edwardmyers1746 yes obviously and some also use a rubber and steel belt.
@@musicrevelation2023 yea but the cvts that use rubber aren't in car
Great and informative vid. I drive a cvt (Nissan NV200) for work and I was always curious how it worked. Pretty crazy stuff actually. But I can attest to them making some strange sounds if you are used to more standard transmissions haha
This is what my Honda elite 49cc moped had. The stock internal gear ration was 12:1. The clutch turned 12 revolutions to 1 revolution of the rear wheel. I changed it to 8.4:1. I then put a Polini Corsa 72cc cylinder, head, & piston. I changed the the carburetor from the original 10mm to a Oko 28mm, & bigger intake. I took off the two stroke oiler, & started premixing. I also put an after market dio pipe. I also bought an aftermarket polini clutch, with stiffer springs & lighter weights. The stock honda elite 49cc moped could do around 34 mph, with the restrictive devices removes from the muffler & airbox. After I installed all the after market parts it could go 76 mph, with 8.4:1 gearing & I could still climb hills. A friend of mine had the same setup but 7:1 gearing & could do 84 mph, but could not climb hills very well. With the after market polini clutch with stiffer springs & lighter weights I had a midrange rpm stall & could easily ride wheelies. I had friends that had 125cc engines that where stroked, with big bore's. They get get close to a 100 mph. This was all when I first moved here to Oahu in 1999. In 2000 I bought my Honda Elite 50 brand new & built it up myself. My moped was stolen from the Waialua Library by a meth addict named K who worked for the Sharks Cove park. I even helped him fix his moped & gave him free parts. This is how the local ice heads repay you. Peace & Love to all the honest hard working men & women in the world.
@ thebentley71
Thanks for that short story my friend...
I am a 50cc / 2-stroke addict and there is nothing more beautiful than the never ending winding noise of a tricked-out 2-stroker..!
I am an Aprilia/Derbi fanatic myself but know full well the cababilities of the Honda/Yamaha 2-stroke family...👍
Yours was impressive FAST..!
That is the most awsome explanation of cvt ever. Thank you so much!
I had a Volvo 343 in the 1970's, which worked this way, but also had a vacuum-powered diaphragm that enabled it to shift down, equivalent to the kick-down that other automatics use, for example, for passing other vehicles. The kick-down was actioned by a switch under the accelerator pedal, or by a manually operated switch to gear-down for running against compression when descending a steep slope. The system worked OK, though I now prefer a manual, gear-based transmission. In general, I find that mechanisms that try to think or me usually fall short in some circumstances. Automatic transmission probably comes about closest to a truly successful A.I, though there are still times when you want to rev the engine and drop the clutch aggressively.
You should do a retroencabulator video with the words from this post.
Have a 2012 Nissan Juke cvt awd.modified the car with Injen intercooler piping. Turbo Smart dual port Bov . Injen cat delete exhaust system .Injen CaI.Up rev tune done by a Nissan tuner. Stock had 165 hp at the wheels . 12 lbs max boost , stock .Now . 20lbs max boost.235 hp at the wheels. The cvt works great .Also stock the car is limited to 127 mph .they changed the limit and mine is now 145 mph limited. Also added the 13" big brake kit. If I use manual mde and shift up and down myself The biggest improvement in the car comes from 45 mph upward. Daily driving in the city I leave it in normal mode. the car remembers my driving habits .So if I I put it in sport mode and say let off of the gas quickly,or slowing down for a light on a small grade it will downshift itself to use the engine for braking .
Juke Turbo fuck you
intelligent ???
Hows the cvt holding up 3 years later?
This is a great video from a company that produces great products. (not a paid endorser or affiliated with in any way)
Very cool video. Thanks for posting and have a nice day too.
Many thanks for this easy to comprehend demonstration.
They did a good job with explaining it.
I am a fan of older technology myself; however, it is nice to see engineers stepping out and designing new technologies for the common people who use their car to get from A to B. There are plenty of other cars with standard and automatic transmissions around still.
CVT Transmissions were Patented in 1879 and have l.o.n.g. been used in Vehicle production.
Not to mention the great acceleration and great fuel efficiency!! I have an audi one of a few with the cvt. Smoothest transmission I've ever had!! 90k miles and smooth as silk.
That's because it's supposed to be lol, it doesn't shift through gears. They are also trash and cost way to much to maintain
And for acceleration most CVTs slip a lot and cause heating issues. They technically can provide move power to the wheels but in reality in use they really can't
Very informative and well made video. Thanks
Did I just see proper ventilation for welding fumes in the intro?... I love you guys. my employer prefers a cloudy shop and dead employees.
what I cannot understand is how a fan belt can move a big car along so fast! amazing!
It come with a special steel belt not rubber and lubricated with the trans oil.
This style CVT is used in snowmobiles and some ATVs. Automotive ones use a special chain.
That's a small one
The "fan belt " is ±1.5 inches wide and steel belted eh... Üö
You can watch a y/t video on how a cvt belt is constructed.
Each pulley is composed of two cones opposed to each other. The cones are able to move closer or further from each other. As the belt has inflexible width it's going to rotate out or inside of the composition of cones as they get nearer or further from each other.
For the bell not having to get tensioned, while one pulley gets bigger the other has to get smaller.
A car having a CVT make the Yugo look good.
Thank Bombardier, since snowmobiles have used this for decades.
Daf a Dutch company were the first to apply CVT's for automotive applications. Daf was acquired by Volvo.
That really is all they are fit for.
Every snowmobile in the world has a drive system like this . It's a very good design .
These have been used in golf carts for years, I worked at EZGo and have seen these with gasoline engines.
best video about this that I have seen yet.
CVT's are great for simple motor vehicles, like snowmobiles
And 2000lb, 1.2L 3cylinder engine Mitsubishi Mirage.
They had the same sort of thing 40 years ago in DAFs
True. My bother had a little DAF with CVT. It was fun to drive but wierd.
Ping Pong and volvo 340s
I think this system is a good idea,however, I believe it needs to be developed and refined further.
I was in the market for a new vehicle,the particular vehicle I was interested in some models had CVT Trans. everything from 07' to 013' had a CVT if you wanted automatic,in 014' you had an option(if you wanted automatic) of 6 speed automatic or 6speed automatic CVT...well I took some late model CVT models out 012' and took them for a good run out on the highway trying different scenarios of acceleration and "gear" changes,these models have "auto stick" semi manual-automatic shifting if you so desire.
What I found was that when going along in top ratio @-60-mph in drive,then auto stick over to 6th gear indicated or top gear the RPM would rise 3-400 rpm,go back to "D" and the RPM would "eventually" settle back the 3-400 RPM...with the regular 6 speed automatic transmission there was and is no RPM fluctuation when going from "D" to auto stick 6th,or top gear or visa versa.I also didn't like the engine screaming at 500 RPM before red-line when accelerating for passing or merging,then back off the throttle to let the CVT settle to the cruising RPM...which I found would also move about a bit if you accelerate and then go back to whatever speed you were doing...the CVT wouldn't get the RPM back down to where it should be right away...the CVT..was a bit idiosyncratic...and I was told the CVT gives good fuel economy in the city,but the highway MPG would suffer a bit.
So in the end I opted for the 014' model with the regular 6 speed automatic,and am very happy with it,and have none of those little idiosyncratic problems I saw on the CVT equipped models.
Further refinement is needed on the CVT Trans.
Reminds me of a 1985 Elite 150 scooter I had! It had EXACTLY the same kind of transmission.
Snowmobiles had CVT's since time began
These are the exact same clutched that have been in snowmobiles since the 1960's. So think of a cvt just like a snowmobile. You never have to change gears, and the ratio is constantly changing.
Exactly like a snowmobile set up.
I have a 2013 Honda Accord ex-l that uses a CVT and it works fantastic and perfectly fine. It has a amazing response time with no issues at all. To be honest I could say I wouldn't drive a car that isn't a CVT after driving one.
I agree my 2014 Altima has a CVT gets awesome mileage. Once you drive one hard to go back to regular automatic.
Looks like the "variable speed drive" on old farm machinery like combines and swathers. My dad's old New Holland (before it was Ford) swather used a hydraulic belt adjustment. The massive belts were 20 years old and still working flawlessly. My grandpa's old Allis Chalmers Gleaner combine had one of those as well as a 5 speed transmission. You see, the engine had to run at a set RPM to keep the threshing machinery operating. You couldn't use it to adjust speed, so they installed massive belt drive CVT units ahead of the transmission. I don't know how long the belts lasted. The combine engines tended to wear out first.
would you consider putting together a video on how aftermarket springs and weights affect the cvt . If more people could visually see what happens when you put 40 grams vs 62 gram weights instead of 70gram weights in with a stiffer primary spring(80lb/2.5in,200lb/1.25in) vs(22lb/2.5in, 200lb 1.25in) and a stiffer secondary spring they would be educated on how it all works on an ATV.
CVT actually last longer than some manual, they drive smoother, they're like 1-speed direct, and more efficient than most engine. The only drawback is the noises (which Subaru removed in their newer model) and low-torque.
my cvt in my Murano is actually quite :) i only hear it when pushing the pedal down quickly :) love the engine Rev and sounds :)
Thank you for explaining thoroughly and concisely how CVTs work. I'm thinking about buying a new car with a CVT transmission and was curious how it worked.
I think it's to late to tell you other wise. But unless you don't want something that will last long and costs a half the price to rebuild then you should go for a cvt since it is really a bad transmission
Polaris and others have these CVT units on their snow machines since the mid 1960's. Same concept: One pulley flange crawls in and the other pulley flange flares out - all due to centrifugal force to make both work.
So light, so simple, cheaper than a normal gear-box, surely. Should have them on (basically) every car.
fuck no
Snowmobile transmission.
Thanks.....that's pretty impressive and reassuring!
Well I didn't invent it, but I do recognise this principle from the scooter clutch systems back in those days and now a days it ain't the same but it's something I don't need, very interesting indeed those modern day automotive technologies
I have a CVT in my Altima, once I got used to it I love it.
Hows the cvt holding up 4 years later?
@@lomparti It didn't lol.
@@JOSHUAHEROO LOL, I would bet a good portion of my life savings on that.
CVT is still the best technology for clutches, Fuel consumption stays ahead of all gear ratio transmission, That goes without saying, my car is a 1200cc. and with it CVT transmission it carried me top speed of 180kph, It proven
1200cc doesnt mean anything when you can put two turbos and rev it in red
Actually dual clutch transmissions are best when it comes to power and fuel efficiency since ether are basically direct drive gears instead of a planetary gear setup which makes a manual into a automatic with the dual clutch setup instead if a tourqe converter. Which technically makes them the best even though regular transmissions are still superior
I used to watch stuff like this back in the 80's in our house up in the mountains but the old analog signal was always bad and the TV used to pop and crackle and go off all the time but sometimes it would be OK for dsys, I spoke to the TV transmitter people but they said there is nothing they can do about the constantly variable transmission hahaha
The CVT, like any transmission, starts in a HIGH RATIO (e.g. 14:1) (i.e. "low" gear). At cruising highway speed, the CVT is in a LOW RATIO (e.g. 1:1) (i.e. "high" gear).
looks cool. i can only imagine how much a new belt costs from the dealer.
Nissan is about $5000 for the belt. Mind you it comes with a complete new transmission. You can't fix these pieces of junk.
@@mrofnocnon but yet lots of cars are going this rout. so the consumer will suffer the effects of real time research. of course we will pay not the car companies.
I don't have anything against CVT's per se, but they do seem to create a disconnecting feel between me, the powertrain, and the road, so I prefer standard transmissions.
I don't really know much about the CVT's in cars these days, but are they also the belt-driven style like the one in the video? It seems like the belt would wear out fairly quickly and you'd be pretty hosed if that were the case, or at least need to change it fairly often. I have a van with 320,000+ miles on the original transmission that's never been broken into. I can't really see a belt style CVT making it near that long without some serious maintenance.
X4HHH that's less vehicle and likely less engine power with that honda, plus you're still looking at double that lifespan. I don't doubt CVTs will have a long lifespan, but I agree with OP. I don't think the lifespan will be the same. Part of my skepticism is based around my experience with timing belts.
I can see small CVT cars with relatively light loads, but my van has pulled boats, moving trailers, sound equipment, 8 college guys, been stuffed to the brim to help people move, etc. I totally know how CVTs work and their advantages, but I just can't see one lasting that long with that type of abuse. I think there's a reason they're not used in pickup trucks or SUV's. Plus, they create a disconnect from the road to me (or at least the one I test drove). Some people like them, and that's totally fine, but I don't think they're for me.
All of the ones I know of are hydrostatic.
Kcducttaper1 Yep CVT's snap belts and chains, under heavy load, that is their down fall ...apparently. Suitable for smaller capacity engines (But apparently still prone to breaking) but not suitable to larger capacity more powerful engines ...yet. I guess if you changed the chain or belt at regular intervals, it would last, but still an expensive exercise. (Not that I'm an expert). But, I imagine they will get better and stronger with advances in technology.
***** "Suitable for smaller capacity engines "
--- Do you mean like the "smaller capacity engines" used in combine harvesters?
great video.thank you very much..
Ah, this helps. I have a Bombardier ATV with a CVT, it won't stop spinning for me to get it in gear, now I know what I need to do.
Most have steel belts, still crap. A moped transmission.
After seeing this, I see why cvt dont last very long
This is made for snowmobiles not cars.
@@Rofferor And motor scooters
@@Rofferor Doesn't matter, the concept is still the same. Car uses a steel belt but it doesn't change the fact that torque is made available by squeezing the crap of the belt and once the tapered pulley get gouged up the transmission is done. That's also why CVT fluid is like 20 bucks a quart.
It is my understanding, that the new Toyota CVT transmissions, have some sort of an idler gear for take off.. This apparently solves the slippage issue during High torque loads.
@@m3rdpwr You're absolutely correct. As time goes by, CVT will get better and better with stronger material and new technology. The CVT's seamless gear ratio and constant drive torque characters are unbeatable. CVT is far more efficient than A/T with clutch packs and gears. However, the durability for high torque (not just starting) and impact/shock loading remains to be the weakness of CVT.
Very well done !
thank you!!
what if the belt Broke?.. i have honda accord with CVT too. but dont really like the CVT. it kinda weak than automatic transmission.
On snowmobiles they generally carry one to two extra belts in case they do break
+Giải Trí Cars use a steel belt instead. So one shouldn't worry about it breaking.
+Giải Trí Honda have been selling cars with CVTs for about 18 years now and have done a lot of refinement. They should have no more problems than a regular automatic. The Honda CVT has the belt in compression and not tension as several others do. Honda believes that this gives better long term high power transmission.
+batchnerd Not all cars use a steel belt. Ford's prior Taurus/500 CVT was a belt drive.
Are you sure? I can't seem to find anything that says the 500's/Taurus's used a rubber belt. I did find however that the transmission was outsourced from Jatco, they state that it is a steal belt.
its cool what you can do with rubber belts, i do other things, but you don t wish to know that
I know right?
I usually wear them around my waist.
sean probably wears them around something else
Sean really needs a life. Don't be a Sean 🙄
That is AWESOME !!!
Great clear educational vid
Great system, but for cars I like hearing an engine accelerate through its rev range as the car accelerates.
That's actually a very common problem CVT transmissions have. They now have "artificial shifting" which to me is stupid because if I bought a CVT I want it to save gas. Not because I'm a car guy. Conversely If I was a car guy I'd have a V8 and not worry about gas mileage.
Only horse farts. Car engine sound will never replace it.
My CVT failed at 44k miles. 2015 nissan sentra. Junk
All Sentras are made to have a transmission failing at some point, at my company we had 8 brand new 2014 model which all failed after 60k such a shame on Nissan, now we shifted back to Toyota.
Got myself a '15 Altima S got it to 101k miles and counting on stock CVT.
Omg same issue 2014 nissan
Nissan is famous for their unreliable cvt. Other brands has better cvt reliability.
You made me laugh. Here where I live second hand CVTs are cheap but full but apparently full of problems. Here 1 tin of CVT oil is approaching $500.00 so an oil change is almost $1000.00 TT dollars in the Caribbean. When does the madness end.
Pretty cool design.
*This technology already using in Honta Kinetic Scooter also 1984 model. :))*
coolest transmission there is. love my CVT. never using a regular automatic ever again.
Why doesn't this have a separate centrifugal clutch, like in scooters and chainsaws, instead of shock-loading the drive belt when the drive pulley closes? Surely this causes undue wear.
I don't think cars use centrifugal clutches..
make you pay for repair
Yeah, me too, but if you see closely, the belt width doesn't change. Its the two pulleys that do the trick... They are cone shaped and their length changes as they accelerate.
Great explanation .. thanks !!
And shit, I could have made this exact same video by lifting up the track of my snowmobile and giving it some gas lol.
Yep had one myself in 1978
when I was test driving a new impreza the salesman said you'll never need to replace the belt
He must have previously worked at a honda dealership
Yeah, only the entire trans. for $4000.
@@4thstooge75 Just replace the whole car LMAO
Great video. New vocabulary is a must...
Very good video. Thank you
My Team CVT clutch in my 2020 Arctic cat Wildcat XX SXS now has 3,550 miles in all (Utah) terrain and still works great I just keep it extra clean.
I am surprised that these belts can have enough traction to deal with a ~300hp car without having excessive wear.
+Adam S (Dolby109) For more than half a century CVTs are quite common in certain agricultural vehicles such as combine harvesters. Engine size above ~300hp is not rare in that category and the vehicles are not light either. Although such vehicles are used only seasonally, some manufacturers CVT belts can last for years or a decade on them. I don't have info on car's CVTs.
The belts do need maintenance, depending on the use, so as the conventional clutches and transmission systems but, for instance, replacing a belt on a CVT takes maybe 30-60 minutes and perhaps all major transmission maintenance work is done with that, while a normal clutch disk replacement takes half a day or more by moving or taking out the entire engine and/or gearbox.
There are many different constructs though. Some vehicles combine conventional clutch and/or transmission with CVT but in solo CVT systems you don't have to deal with transmission fluid, synchroniser rings, etc. Anyway, CVTs are better in many respect.
+AD S not the case most belts are good for 10000 miles except in a scooter which last 4 to 5 thousand miles
nicholas danca Well I only have experience with CVT combine harvesters which certainly do not run thousands of miles. They harvest for a couple of weeks, sometimes over days and nights at low RPM then put aside in garage until the next year. :) But if you have experience with CVT cars I wouldn't challenge you on that as they are certainly a lot more exposed to extreme usage.
+AD S They're absolutely horrible in anything that requires decent driving dynamics. The frustrating thing is that they are built around an outdated philosophy of having changes in ratios made mechanically ie. the centrifugal force. Torque converter autos were also terrible when they used this principle. They were initially controlled hydraulically and experienced something identical really to the 'rubber band' issue found with CVTs in cars. As soon computers were introduced to do very simple but constant calculations with RPM and groundspeed, they became infinitely better and the best transmissions we currently have; DSGs, are completely based around the idea of having a computer predict and preselect gears.
This same philosophy could absolutely make CVTs but it seems developments have been rudimentary at best, and typically involve combining them with a gearbox which doesn't improve anything.
If the distances between the flywheels were controlled intelligently, CVTs could probably be great in small cars.
+Bannicus "If the distances between the flywheels were controlled intelligently, CVTs could probably be great in small cars."
Is this what cars with CVT gearboxs that let you select 1st, 2nd, 3rd etc do? For example the Subaru WRX.
works for a lawn tractor but I wouldn't want that in my car.
Its only for scooters
@@krasozbourne6198 and snowmobiles
finally a good video. thank you
That is Damn brilliant.
Just say NO. 111K on my '05 Murano and it's shot. Always maintained by the dealer at the recommended intervals. . . Not worth the $5K to fix it. What a joke. You cannot service or rebuild them. Stick with traditional automatics!
same thing with my 04 murano
BK Meisenburg spunds like you got totally ripped off by the dealership. Some of them dont properly maintain the cars you bring in and these car definitely be serviced and rebuilt. You got scammed
9a2er where tf do you live man? I only see a standard transmission every few days, and I tend to LOOK for em
I am on my second tranny on my 2013 accord they replaced it the first time and the second one only lasted for 35,ooo km and I was told it was only on warranty until 20,00km . so to me Honda must know of the problem but not want to deal with it. Honda has lost a great customer, I have spent over 70,000 bucks in the last 8 years on Hondas and never again, I am buying a shit box for 2500 bucks and when it dies I will buy another shit box.
Ryan Hirsch Honda cvt sucks. That's why you should get Subaru's CVT as they used steelchain belt. Or if you like a car with traditional automatic then Mazda is for you. Honda sucks. Its trash and stagnating engineering.
Bunch of salty Nissan owners salty. Honda and Toyota CVT Master Races!!
Yellow power
@@dpolendo Subaru CVTs are pretty good. The one in my 2018 Forester is great but can be jerky when 'downshifting'.
@@andrewschannel4259 if the subaru performance wagon used AT transmission, it would be great tho...
snowmobiles had 'em for almost a century now.
Awesome video!
the design of the constant velocity transmission is truly mind-blowing it is an amazing piece of machinery but they still suck and don't last as long as a regular shifting transmission
Could this technology be applied to Wind Mills for electricity production?
+Norberto Rivera this sounds like a good idea to extract maximum energy under all wind conditions,
Small wind turbines maybe, perhaps upto 10 kW. But the small ones do not actually need a variable transmission. The large ones you see in farms are rated 2 MW, that's 2000 kW. The size of the belt, the clutch mechanism and the springs of the centrifugal clutch wouldn't be able to handle the power with present sizes of gearbox. In which case, we'd have to look at a larger nacelle and the problems that come with it. Theoretically doable, but difficult practically.
seems like this design while efficient would not be able to hand a lot of torque... how do they prevent belt slippage on a CVT?
I've seen CVT on ATV/RV vehicles upwards of 200hp and in industrial applications of up to 350hp. Proper component selection for the power rating of what is needed is essential - no different than any other transmission selection.
it is able to handle the torque it is designed for unlike conventional gears... it has a very narrow band therefore any numbers above its limit will affect its functionality...
Increased surface area it increase fiction, Watch "the workshop" he explains it very well.
It is different and i have never seen a truck using cvt. It can not handle excessive amount of stress (torque) cause cvt depend most on the belt. The belt itself has to be as flexible as possible cause if it's not, the vehicle won't shift and in order to be flexible, the belt itself must be weak and that too is why CVTs are only suitable on scooters and light cars.
By making a weak ass engine :D
I ENJOYED YOUR VIDEO ABOUT CVT
The CVT transmission system is ideal for low-power vehicles for citizen use, but when used in fairly powerful cars and on the road when using cruising speed, the transmission belt overheats to work in the same place for a long time , its wear is accentuated and its durability is much lower or failures and breaks occur.
I had a CVT which failed at 47K miles! NEVER again! They feel 'rubbery' when driving, and I don't feel as connected to the road as well. Many CVT's have been perfected, yes, but I need more reliability than this. I've also read that CVT's are a 'cost cutting' measure in many car manufacturers. They put a CVT in their cars because it is cheaper.
AudiophileTubes let me guess you had a Nissan
I'm trying to get my head around this. People say that CVT's suck. I honestly dont know why, but I didn't understand the concept of a CVT until now. But I still dont understand why people say CVT's suck. Can someone, from there point of view explain why people hate them and why others like them.
Jacob W " But I still dont understand why people say CVT's suck. "
--- CVT's essentially disconnect engine RPM from the road speed. Some people find that disconcerting and are willing to sacrifice performance and fuel economy to stay with an engine RPM vs. road speed behavior that they are familiar with. I find such a sacrifice inscrutable - but that's me.
Jacob W It doesn't sound or feel what people know of as "sporty." Instead of getting that throaty growl that gradually increases pitch, volume, and acceleration as the RPMs go up, and then restarting the sound with each shift, the CVT basically sounds like you're redlining in neutral and the acceleration is constant, so the only acceleration increase is immediately off the line. The gradual changes throughout the acceleration experience are what people have been trained to recognize as "sporty" or "aggressive." CVT transmissions simply don't satisfy the superficial needs of most driving enthusiasts, even though they may excel in their technical efficacy.
Sadpants McGee "so the only acceleration increase is immediately off the line. "
--- Please cite the source from which you got that information.
"CVT transmissions simply don't satisfy the superficial needs of most driving enthusiasts"
--- Please cite the source from which you got that information.
Number Six No.
Sadpants McGee "No."
At least you didn't create some bullshit lie.
Yes, you can manually shift a CVT. Most, if not all, CVTs on the market today have a manual mode. This allows you to select and hold one of several pre-programed pulley ratios. This allows a CVT to mimic a traditional 6 or 7 speed automatic.
I noticed that a while ago that my Nissan Armada has one two three and four gears in the selector I'm not brave enough to try switching through those gears on a road
And I'm brave enough to drive a manual semi truck so
@@coywolfproductions7056 I used to have a Nissan Titan. Same gear selector. The 1-2-3-4 positions are just gear lockouts. 1 locks the transmission in 1st. 2 allows gears 1-2. 3 allows 1,2 and 3. 4 allows 1,2,3 and 4. D allows all 5 gears. Using the manual gear ranges is really useful for towing or engine braking down a mountain. It doesn’t hurt anything.
@@splewy ah that makes sense
The Titan has always used a conventional automatic transmission. I believe the heaviest vehicle Nissan made with a CVT is the Murano. (I had an 03 Murano, nice rig). @splewy
I think they are cool. In their design, they may have issues out there I'm sure. On a scooter, they work well, you do have maintenance on the belt, to replace it every so often. Big whoop. beats changing gears!