Every element of this complex system was made equally robust to all the other elements . That is why it is successful and admired . No weaknesses that compromise reliability . That is a rare achievement . CEO's and accountants usually destroy reliability .
CVTs are good and reliable when made with good materials and have an dedicated controlling software, thats why they dominate the industrial and farm equipment designs
The best part is that these transmissions do not have chains and are all gear driven which means they really last forever when maintained. My Honda Clarity has 180k miles and is still going strong.
This is probably the best possible transmission if the car has to have an internal combustion engine. Notice also how it doesn't have clutches, so there's very little that can wear out, other than the battery that drives the electric motors.
You don't even need a battery for this to work (apart from starting the engine). You can simply just transfer the electricity between the two motor-generators... There is also a hydraulic version of this system in heavy duty machinery.
yep. that's the beauty. no clutch slip or torque converter required, it replace the starter, automatic gearbox, clutch, and possibly alternator. no actuators, clutches, just vers rotating in oil
I have an 08 Prius with 230,000 K, the eCVT is completely smooth and allows for the best fuel economy because they fully adjust everything together as one, electric motor, petrol motor, wheel torque required, the best cruise control function, etc.
I believe that Fendt Tractors made in Germany acheive a contiuously variable drive by using a hydraulic motor to manipulate the sun or planetary portion of the planetary gearset to transmit massive torque in a speed controlled manner. Brilliant stuff. I own a 2019 Toyota Camry Hybrid, and love the incredible research and developement that has gone into their products. My real world fuel ecconomy over 120,000 trouble free kilometers is 5.2 liters/100 kms. Unbelievable for a mid size car. And no traditional CVT belt. :)
Toyota engineers deserve the Nobel Prize for that. The ultimate achievement in ICE-powered cars. And ICE will remain with us for quite a long time - everybody knows that long distance cruising in BEV is practically not viable, especially during the winter.
I always thought the eCVT was just toyotas name for yet another unreliable CVT.... But this is a work of genius and no wonder there are barely any reported failures...
Great description of the system eCVT. I was curious how the variable part works without the use of cones, belts, or whatever. I'm amused at how it seems to be a Ford training but only because I know Ford licensed the Toyota system. 🙃
Ford doesn't actually use Toyota knowledge. These 2 brands worked together at the first half of the development, but they split up, so they finished seperately. There are no shared parts. It's like saying that every manual transmission was licensed from xy brand. It's not true. There are actually some Ford upgrades to this transmission that Toyota implemented many years later.
At speeds below 45 mph these are electric cars with gasoline assist. At speeds above 45 mph the electric motors work to make the gasoline engine do almost all of the work (at the optimum rpm and load, of course) And the gasoline engine can only assist in the forward direction. All reversing is from the big electric motor.
When I let go of the throttle and start to coast (at a bit higher speed) and once the speed drops to around 47mph (75kph) I feel a little jolt - sort of like the engine starts. Why is that? It happens every time and at the same exact speed.
That feeling on insta torque, where i can crowl at very low speed with almost not touching the gas, is it thanks to this eCVT or because the car is hybrid?
Lemme see if i have this right This is not like conventional transmissions where gear ratios are directly changed by gears. This is better described as a direct drive system that uses an open differential and electric motor to allow a ICE to rotate at speeds regardless of vehicle speed
Agree, while the speed ratio can be changed, the torque ratio is fixed. This makes the"ratios" involved different to those in other transmissions. Certainly a very cool system though - permanently meshed gears, no clutches, no synchros, to torque converters 👍
ปีที่แล้ว
I admire whoever came up with this idea, but I think nissan e-power is simpler and more efficient!
And how is that achieved when my Fusion hybrid has a cold start, the combustion engine is running at idle rpm, and the electric motor is driving the car alone? As there is no clutch, it can't disengage the engine from the driveshaft.
I’m looking to purchase a lexus is300h 2016 reg. I see some that say cvt and others that say e-cvt which is why I looked up this vid. I am complete newbie with this stuff, can someone please advise me which one I should get and why (in simple terms). Many thanks.
How much power output is required by MG1 compared to the ICE over the full range of speeds? It looks like MG1 has a mechanical advantage over the ICE, so it will require less torque, but does that translate to less power? I'm having trouble wrapping my head around this.
I didn't understand much. It's too complicated for me. 😅 Though I hope this explains this is different and better than CVT. Because they say hybrid Camry has a E-CVT. I took a test drive 2023 Camry for very short time "20 minutes only" and I liked how it's quiet and smooth it was that I didn't drive over 60-80 km/h 😂
Your comment is 5 months old but thought I would add some insight. In comparison to a normal automatic transmission an eCVT has a fraction of the parts. Granted to make it work you need electric motors and a battery so you can't just put one of these in a pure ICE vehicle. Couple a simpler transmission and regenerative braking and harvesting excess engine rotations for power you get very efficient vehicle. My Ford Maverick gets 45 mpg on the highway.
Agree, I think CVT is a bit of a misnomer in this case. The torque ratio of this transmission is fixed, though the speed ratio does vary. In every other transmissions, one is the inverse of the other.
![[MPD직캠] 베이비몬스터 직캠 8K 'LIKE THAT' (BABYMONSTER FanCam) | @MCOUNTDOWN_2024.6.13](http://i.ytimg.com/vi/8qa-nm9bCLs/mqdefault.jpg)
Every element of this complex system was made equally robust to all the other elements . That is why it is successful and admired . No weaknesses that compromise reliability . That is a rare achievement . CEO's and accountants usually destroy reliability .
Your last statement.... As a career engineer... That is so true!
Thanks for the video, I had totally written off CVTs and assumed the eCVT was similar to a CVT.
CVTs are good and reliable when made with good materials and have an dedicated controlling software, thats why they dominate the industrial and farm equipment designs
The best part is that these transmissions do not have chains and are all gear driven which means they really last forever when maintained. My Honda Clarity has 180k miles and is still going strong.
In my opinion this is the best simplest video in youtube to explain the marvel of the eCVT transmission. Thank you.
Great explanation of the transmission in my RAV4 PHEV. So smart and so smooth in real life
This is probably the best possible transmission if the car has to have an internal combustion engine. Notice also how it doesn't have clutches, so there's very little that can wear out, other than the battery that drives the electric motors.
You don't even need a battery for this to work (apart from starting the engine). You can simply just transfer the electricity between the two motor-generators... There is also a hydraulic version of this system in heavy duty machinery.
and it's definitely not a CVT + first gear like many will explain eCVT vs CVT.
@@krecikowi It is CVT, just not the V-belt type...
yep. that's the beauty. no clutch slip or torque converter required, it replace the starter, automatic gearbox, clutch, and possibly alternator. no actuators, clutches, just vers rotating in oil
@@geemy9675and also no flywheel as there allways is a rotating mass in the gearbox that is fixed with the ice
Fantastic video. Everything was explained clearly and the visual representation was helpful
I have an 08 Prius with 230,000 K, the eCVT is completely smooth and allows for the best fuel economy because they fully adjust everything together as one, electric motor, petrol motor, wheel torque required, the best cruise control function, etc.
The best explanation that I've see about this topic! Thank you so much!
I believe that Fendt Tractors made in Germany acheive a contiuously variable drive by using a hydraulic motor to manipulate the sun or planetary portion of the planetary gearset to transmit massive torque in a speed controlled manner. Brilliant stuff. I own a 2019 Toyota Camry Hybrid, and love the incredible research and developement that has gone into their products. My real world fuel ecconomy over 120,000 trouble free kilometers is 5.2 liters/100 kms. Unbelievable for a mid size car. And no traditional CVT belt. :)
Thank you. This is probably the best video I’ve seen on TH-cam that explains how these eCVTs work.
Thanks for the info. It confirms my understanding of how the eCVT is used.
That's crazy cool! The RAV4 hybrid uses this method
The system is really great, especially without any clutches. And the explanation is quite clear. Thank you.
Wow. Brilliant explanation and real life model. Way better than a 3D animation.
This explanation is BRILLANT !
Really great explanation and demonstration. Thanks
This is crazy! If I hadn't driven a car with eCVT, I wouldn't have believed it worked! Who would think such staff?
Without Engineers we'd all still be walkin.....
A non E cvt is junk but this using a planetary gearset as cvt is pure genius
@@jessewoody5772 engineers didn't invent horses ;)
Absolutely sick! GJ Toyota! And GJ David Patience.
Nice demonstration! Thank you.
Simply awesome thank you for this knowledge it will be used
Hey Bro! That is an awesome video! Great job!
very comprehensive explanation
Great video always wondered what was going on
Wonderful Toyota ! ❤ Thanks for this video ! I will try to create an 3D printed RC car using a stirling engine and a 3D printed eCVT 😁
awesome demonstration
A very versatile drive system....
Bikes cars the list goes on.....
Tnx bro you explained this so complex system into easy ways with simulation pls come again
Excellent explanation.
Outstanding video
I though the computer was doing some clucth trick to split the power, heck i didn't even think that it was fully mechanical!
Toyota should really nave the eCVT differently. Everyone assumes that eCVT is CVT + electromotor. But this is just different.
Toyota engineers deserve the Nobel Prize for that. The ultimate achievement in ICE-powered cars. And ICE will remain with us for quite a long time - everybody knows that long distance cruising in BEV is practically not viable, especially during the winter.
I always thought the eCVT was just toyotas name for yet another unreliable CVT.... But this is a work of genius and no wonder there are barely any reported failures...
Best explanation I've seen. Bravo!
Great description of the system eCVT. I was curious how the variable part works without the use of cones, belts, or whatever.
I'm amused at how it seems to be a Ford training but only because I know Ford licensed the Toyota system. 🙃
Ford doesn't actually use Toyota knowledge. These 2 brands worked together at the first half of the development, but they split up, so they finished seperately. There are no shared parts. It's like saying that every manual transmission was licensed from xy brand. It's not true.
There are actually some Ford upgrades to this transmission that Toyota implemented many years later.
At speeds below 45 mph these are electric cars with gasoline assist.
At speeds above 45 mph the electric motors work to make the gasoline engine do almost all of the work (at the optimum rpm and load, of course)
And the gasoline engine can only assist in the forward direction. All reversing is from the big electric motor.
感恩了解，謝謝分享！
amzing video thanks
Well explained
Very nice
This unit has a 1 way sprag that's what connects the engine to transmission and lets the engine drive or recharge the generator
When I let go of the throttle and start to coast (at a bit higher speed) and once the speed drops to around 47mph (75kph) I feel a little jolt - sort of like the engine starts. Why is that? It happens every time and at the same exact speed.
Complex electrical electromechanical system i hope this will last long
That feeling on insta torque, where i can crowl at very low speed with almost not touching the gas, is it thanks to this eCVT or because the car is hybrid?
So this thing has an electric motor in place of a torque converter? is that what I'm seeing? That's brilliant.
Can you tell me what is turning inside when I put my Maverick in neutral tow mode and tow it behind my motorhome?
I knew the ecvt was different, but every video prior it was just black magic in a box. While I still don't fully comprehend it, at least I can see it
Lemme see if i have this right
This is not like conventional transmissions where gear ratios are directly changed by gears. This is better described as a direct drive system that uses an open differential and electric motor to allow a ICE to rotate at speeds regardless of vehicle speed
Agree, while the speed ratio can be changed, the torque ratio is fixed. This makes the"ratios" involved different to those in other transmissions. Certainly a very cool system though - permanently meshed gears, no clutches, no synchros, to torque converters 👍
I admire whoever came up with this idea, but I think nissan e-power is simpler and more efficient!
And how is that achieved when my Fusion hybrid has a cold start, the combustion engine is running at idle rpm, and the electric motor is driving the car alone? As there is no clutch, it can't disengage the engine from the driveshaft.
I’m looking to purchase a lexus is300h 2016 reg. I see some that say cvt and others that say e-cvt which is why I looked up this vid. I am complete newbie with this stuff, can someone please advise me which one I should get and why (in simple terms). Many thanks.
I believe the is300h will have the eCVT described here, not a conventional CVT.
Toyota goated for this
How much power output is required by MG1 compared to the ICE over the full range of speeds? It looks like MG1 has a mechanical advantage over the ICE, so it will require less torque, but does that translate to less power? I'm having trouble wrapping my head around this.
What if we accidentally switch gear to N when driving, is there any impact on the ecvt transmission?
I didn't understand much. It's too complicated for me. 😅 Though I hope this explains this is different and better than CVT. Because they say hybrid Camry has a E-CVT. I took a test drive 2023 Camry for very short time "20 minutes only" and I liked how it's quiet and smooth it was that I didn't drive over 60-80 km/h 😂
So how does transmission fluid play into this? Excuse my ignorance!
The fluid is still used for cooling and lubrication, but not used as a hydraulic fluid.
I have the exactly same thing in school hahaha
TIL, no starter in my RAV4 Hybrid. No wonder it doesn't make a lot of starter noise, and it shakes less than my petrol car.
with so many parts needing to move, is the efficiency lower than pure ICE?
Your comment is 5 months old but thought I would add some insight. In comparison to a normal automatic transmission an eCVT has a fraction of the parts. Granted to make it work you need electric motors and a battery so you can't just put one of these in a pure ICE vehicle. Couple a simpler transmission and regenerative braking and harvesting excess engine rotations for power you get very efficient vehicle. My Ford Maverick gets 45 mpg on the highway.
@@timobermark6732. For everyday motoring I agree with you. But for a high speed continuous run I’d prefer a DCT or 6 peed torque converter.
I wonder how durable this transmissions are in the long run!
Very. I drive a prius with an ecvt - 300k miles and you never feel the transmission.
I second this. Kinda sucks belt based CVTs give CVTs a bad name since eCVTs are completely different.
What does output mean in the diagram?
So it has NO gears? Just combination of mg1, mg2 and engine RPM? It's difficult to make it productive...
Y'all just had to use chains in the demo. The lack of chain belts in ecvt is what makes it robust.
I didn't make the model only the video. But the real unit has a chain too.
Ecvt is not even close to a cvt so why call it cvt?
Because it is a Contstantly Variable (ratio) Transmission. It just does it without a belt
Agree, I think CVT is a bit of a misnomer in this case. The torque ratio of this transmission is fixed, though the speed ratio does vary. In every other transmissions, one is the inverse of the other.
Try make it more visually clear. It was not obivious what is going on on this one