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Continuously Variable Transaxle (CVT) Operation

Продолжительность: 00:05:04

Weber State University (WSU) - Automotive Technology Department - Transmission Lab. GM Continuously Variable Transaxle (CVT) model VT25. How a belt-driven CVT Works. Ford, GM, Honda, Chrysler (JATCO), and Nissan CVTs are similar. CVTs allow the engine to operate at the RPM for peak efficiency while increasing and decreasing the transmission drive ratio to change vehicle speed. This video helps satisfy NATEF Task A2.C.23. "Describe the operational characteristics of a continuously variable transmission (CVT)", a priority 3 task. eCVTs are different and are demonstrated in another WeberAuto video. Download the VT25 Range Reference Chart here: This video was created and edited by John D. Kelly at WSU. For a full biography, see

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Написал: icicicles, 16.04.2014, 04:36

Funny how CVT has changed from what I learned in college during the 80's as constant velocity transmission to now the Continuously Variable Transaxle or transmission. Then they were driven by a rubber/steel belt and today they are steel belt.
Написал: siva balaji, 12.04.2014, 08:36

a very good explanation and easy to under stand thanks alot
Написал: Ecoenergy, 04.01.2014, 13:43

Excellent demonstration. Do you have anything similar on electromagnetic or hydraulic dual clutch gearbox. 
Написал: Marty Patrovsky, 13.12.2013, 19:24

Mickey Mouse Piece of Cra#. Won't handle any great amount of torque.
Написал: British_Leyland(Alexscott100), 28.02.2014, 02:54

I have a 2003 Saturn ion quad coupe with the CVT is tht a good transmission
Написал: Michael Johnson, 09.04.2012, 00:35

TIL how a CVT transmission works... a little different than I thought it worked, but none the less very neat and simple. On a side note <3 manual transmission.
Написал: MisterMattyMo, 18.02.2012, 04:39

This video is amazing! Thanks so much!
Написал: Emma Haarp, 17.05.2013, 03:08

Great demonstration! I'm having a problem with my CVT, you can see my video in my channel.
Написал: vasiliy petrohof, 18.07.2013, 17:32

the heat in an auto trans is mostly made by torque convertor and clutch packs. i would expect cvt to run cooler once TC is locked.
Написал: WeberAuto, 03.11.2012, 00:55

Hi, there is an angine speed driven oil pump in the transmission that pressurizes the fluid.
Написал: Reentsis, 22.10.2013, 04:47

Man, unlike you I have ridden a scooter with CVT for too many miles and in too many places where you wouldn't even ride a bus and I know how often you have to change tension belts and what are the drawbacks and flaws of the system. Modern gearboxes easily run without any intervention,even oil change for good 200,000 km. Same can never be said for CVTs.Belts in a car are normally changed every 100K km or less, and they don't have power transfer function, just timing of valves.Comparison is flawed
Написал: 3319Adrian, 18.01.2012, 21:42

@moyadapne Wow. The belt cost u $600?!
Написал: austin peters, 26.03.2012, 20:19

We drive a 2011 Jeep Patriot with the JATCO CVT, do we have to replace the belt or how long do they last?
Написал: Tony Garza, 29.06.2012, 05:38

Does the tranny fluid need be changed on cvt trannies? I have a cvt on a 07 nissan sentra and have not changed it yet. Do you think a flush is better than a regular change fo tranny fluid? Thanks for the video and hope to get a response!
Написал: amjedo, 02.11.2012, 03:39

Hi, great explanation. I have noticed that you applied hydraulic pressure to bring in the drive pulleys together. Is this what actually happens in a car when you accelerate and decelerate? where does the hydraulic pressure come from?
Написал: millwrightman99, 23.06.2013, 00:24

The Chrysler CVT is a piece of crap ., the jeep I took out felt gutless and the engine sped up but the vehicle did nothing for what seemed a few seconds , If the engineers program shift points then maybe it might be worth looking at , but I would avoid them right now .
Написал: vmsysprog, 11.08.2013, 16:37

Where would you put it? Currently, It's a two pulley system. One on the motor and one on the trans-axle end. It would need a very heavy duty belt. But then you get into wear on the belt and pulley surfaces. I'm surprised the auto industry is trying this. Probably fewer moving parts than an automatic tranny but the belt is the weakest link.
Написал: Richard Hicks, 23.05.2013, 05:42

Great explanation, are any specalised tools required to strip and rebuild this transaxle. I have 2 Honda Airwaves, One is fabulous and the other won't go up even a small hill. If I can fix it , it will be a great car. Parts seem to be readily available here in New Zealand. Any help to get this transaxle out and working again will be appreciated. Does any one know if the transaxle can be removed without the motor ? Thanks All
Написал: eng muhamed, 29.10.2012, 04:49

very good viedo about CVTs and it would be great if you have a video/link about the electrical control of CVTs.
Написал: motanelustelistu, 28.02.2012, 01:41

So basicly its like a scooter trasmision , only 1 reverse clutch added
Написал: VulgarBenjamin, 14.04.2012, 16:12

Thank you for making this video. I just bought a Altima 3.5 SR and was curious exactly how the CVT worked. The little car is faster than shit, I'll say that.
Написал: MyJigarpatel, 29.09.2012, 11:22

I think CVT will save move petrol. CVT is smooth and energy efficient transmission compere to manual transmission.
Написал: Na5iR11, 06.04.2013, 16:31

Great demonstration. Thank you.
Написал: hany nour, 20.09.2013, 23:38

just perfect
Написал: barrack reagan, 20.02.2012, 15:49

ford freestyle & 500