3rd Generation Toyota Hybrid (eCVT) Transaxles
ฝัง
- เผยแพร่เมื่อ 10 มิ.ย. 2024
- A comparison and demonstration of the 2nd and 3rd generation Toyota hybrid transaxles
TIMELINE:
0:00 Introduction
0:51 Components from the 1st, 2nd, and 3rd generation Toyota Hybrid Transaxles
2:20 The torque limiting clutch from the 1st and 2nd generation transaxles
3:00 The torque limiting clutch from the 3rd generation transaxles
4:05 The torque limiting clutch and Internal Combustion Engine (ICE) drive the planet carrier
4:55 The oil pump driveshafts
5:55 The Motor/Generator 1 (MG1) drives the sun gear
7:45 The 1st and 2nd generation Motor/Generator 1 (MG2) drives the ring gear
9:21 The 3rd generation Motor/Generator 1 (MG2) drives the ring gear through a Motor Speed Reduction (MSR) planetary gearset.
13:40 The functional differences of MG2 on all three generations
18:00 Assembling the 3rd generation motor and gearsets
22:17 Review of components
24:28 Powerflow demonstration and modes of operation
24:48 Reverse
25:06 Forward at low speeds
26:38 Starting the ICE
29:18 Summary of video
For a more detailed overview of the Toyota Powersplit eCVT, see my 2021 video on the Toyota RAV4 Hybrid here • Understanding the Toyo...
ABOUT US:
Weber State University (WSU) - Automotive Technology Department - Transmission Lab. A comparison and demonstration of the 3rd Generation Toyota Hybrid Transaxles used in the 2010-2015 Prius family (P410, P510), 2006 - 2017 Highlander HV family (P310, P313), and 2007-2017 Camry HV family (P311, P314). How an eCVT Works. eCVTs allow the engine to operate (when necessary) at the RPM for peak efficiency while increasing and decreasing the transmission drive ratio to change vehicle speed.
We teach advanced vehicle technologies to our automotive students at Weber State University and online. For more information visit: www.weber.edu/automotive
This video helps satisfy NATEF Task A2.C.24. "Describe the operational characteristics of a hybrid vehicle drive train. (eCVT)", a priority 3 task.
Push-belt CVTs are different and are demonstrated in other WeberAuto videos here • Continuously Variable ... and here • The 423-Piece CVT Stee...
This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see www.weber.edu/automotive/J_Kel...
Visit my other youtube channel / vibratesoftware to see the amazing NVH app for vibration diagnosis!
ADDITIONAL TRAINING FOR YOU
Join us for hybrid and electric vehicle training with two online courses and in a 5-day on-campus boot camp with Professor John D. Kelly. See www.weber.edu/evtraining
DONATE TO OUR DEPARTMENT
Please consider a donation to the Department of Automotive Technology at Weber State University here: advancement.weber.edu/Automotive
These are literally the most reliable transmission systems in the world right now, and you can see why.
I wonder how much less reliable 2nd Gen are compared to the 3rd Gen.
@@MaximC They aren’t less reliable.
@@afcgeo882
You sure? I've read the chain may fail. Why they changed it to direct then, for other reasons?
@@MaximC It has NO chain! Did you watch the video? Toyota’s eCVT are planetary gear sets, not CVTs.
@@afcgeo882
He did mention it, a chain in 1st and 2nd generation of Toyota's PSD/eCVT.
I'm super amazed to see that 1.2 MILLION people expressed interest in learning about these transmission from your video 😳
Hi, Thanks for the comment and concern. You should have seen me try to do this demonstration on a steel bench, everything was sticking to the bench and to each other; it was a disaster. I could not even pick up the MG2 rotor when it was on its side. I had to roll it to the edge and slide it off. It is amazing how strong those magnets are. Cool technology!
Key to understanding how the drive works is the fact that MG1 and MG2 are AC motor-generators and their speed can be controlled exactly by the computer. This is how the ratio between crankshaft, electric motors, and drive shaft speed is controlled, i.e., how the drive acts as a CVT.
Great feedback!
Great explanation
@@WeberAuto does the lexus gs450h hybrid gearbox have the same mechanism and work in the same manor?
This was a tremendously helpful video and I want to thank the presenter for all the work in doing it. It helped me to understand a lot about planetary gears and sun gears and ring gears and their arrangements. You have to remember what this system is actually doing (and doing very well) in your car.
I own a 2016 Prius C, which I love. I suppose the gear ratios in it are even better. As a former operating engineer, I appreciate the genius of Toyota in building these amazing machines. They are only going to get even better.
Again, thanks for the great presentation, WeberAuto!
Thank you!
Thanks for the comparison. I did not know there were any major changes to the transaxle for the 3rd generation prius. This does explain a lot, especially how the plug-in version can go faster in EV mode. I'd like to see an explanation of the Chevy Volt transaxle!
Wow, you commented this way before you made it big.
Hi!
wow
Watch these videos all the time this guy is a transmission PRO!!!
Thanks for helping me to understand how these ecvt transmissions work. The design is so elegant and robust. So much going on with the torque controlling from the ICE and motors. Mind blowing to think about gearing to change maximum e-only vehicle speed. Very cool!
Thanks for taking the time to make a Long video...everything today is Rushed and just sucks because you end up missing details! I prefer videos like this, where it feels like you're in a REAL classroom and have time to absorb it! Good stuff!
Thank you!
Nice to see this graphically illustrated. Thank you.
Thank you!
Great explanation! I can’t believe how small it all is and that there is no cvt belt. It’s nice to understand my car more.
My first model Prius 2001; Second Prius 2011. Now I think I understand how the 2011 cruise control is able to slow the car preventing overspeeding on downhill runs, a feature I didn't discover immediately. Very useful function.
Hi, providing various amounts of resistance causes the overall gear ratio vary. It makes the transmission act like a CVT.
Great breakdown of the e-CVT!
"Very strong magnets" *sticks hand between them.
Your explanations filled in a lot of the gaps in understanding I had after watching Niels Blaauw's excellent video. These two together cover the topic well.
Thanks for the video! I love my Gen II and my C. Amazing feats of engineering IMO.
Thank you for doing this video. Great info!
EXCELLENT videos thanks a lot for taking the time to make them
Mechanically, these are very, VERY simple compared to a typical car transmission. All of the complexity is in the electronics and they're proving to be pretty bulletproof.
Great explanation, excellent information to understand how to work the e-cvt transmission. Congratulations!!
Love these Hybrid transaxle videos
Thank you
Thanks for all your awesome videos!
Please keep making videos, very helpful and educational. Thank you!
Thank you!
Ingenious design...great presentation!
Brilliant video! Loved it very informative
That was so relaxing to watch for some reason. Oh, and really informative. We have a 3rd gen Prius and 3rd gen Highlander hybrid. Thx!
Weber' your are only one i can get this information.. its is very important you to train or teach your knowledge to more people..
Excellent piece of engineering.
Very nice way of demonstration , easy to understand the functions..... thank you so much.......
Thank you!
great information, thank you...
Wow! This is extremely well prepared, well presented, demonstration. I just bought a Prius and, being an engineer, I need to know how it works. This and the simulation that’s available here are definitely clarifying this fascinating system for me. Thanks for all the hard work that obviously went into this. 👍👍👍
Thank you!
If people knew how insane geniously this is and work, everyone would buy toyota hybrid. It works just amazingly great.
its neat but if fuel economy is your game there might be better choices.
Not really. The Prius is pretty hard to beat. There are thriftier cars to drive but they're almost exclusively tiny, not available in the US, or no longer made - or all of the above.
either way, they are a bit "optimistic" with their mileage ratings.
My wife's 2010 gets 50 mpg +/- 3 mpg all year long, even though most of her driving is short trips.
My wife still gets the rated 47 MPG in her 2008 with 160,000 miles on it.
Excellent explanation of the gen 3 gear set in the transaxle
Thank you!
This was absolutely fascinating
Thank you
Very concise explanation
Thanks a lot for this great Video, very, very illustrative.. Them no dudes !!
Thank you!
Thank you John Kelly and Weber State University - a first class explanation.
Thank you!
Awesome video thank you.
Thank you!
Great review, thanks.
Excellent - thank you! Those gear sets are works of art. Amazing to see how compact the electric motors are compared to an internal combustion engine.
Hm
Hm
Are those actually the motors or just the rotors from the motors ?
Either way when you look at the size of a washing machine motor which is only a couple of HP they are incredibly small.
Yes likely just the rotors shown there. Would be nice to see the entire assembly.
you did a very good presentation! thank you!
Thank you!
very appreciated for this explanation. I like it.
very good explanation. that was a very good demo. I haven't a clue how it works. very good for Prius owners.
justin sincoise Thank you!
MUCHAS GRACIAS POR LA INFORMACION
Great video. Excellent explanation.
Thank you!
Thanks for the education! That is quite the mechanism! Enlightening even to a neophyte like me.
Nice presentation.
Thank you!
Great video !! Thanks
Thank you so much for your video
Great video, thank you!
Awesome video!
A reason for the taller gearing on the Prius C is that it runs a lower voltage hybrid battery. Motor RPM is proportional to voltage and so it can't run the motors as fast meaning it needs taller gearing to get the same roadspeed. Given its a smaller, lighter car it needs less torque which is good because that's also what you get with taller ratios :)
Great video, thanks.
Great explanation.
Best videos! I understand the prius transaxle better. Thanks.
Thanks for the very informative video!
I have a couple questions if you don't mind... What kind of motors are MG1 and MG2? DC brushless? Also, what holds the ICE stationary when in pure electric mode? Is there some sort of brake band?
Hi, the motors are three pase AC synchronous (with permanent magnets on the rotor) . They are not induction motors, they are not DC, and they do not use brushes. The ICE is not held stationary, but it stays stationary when off by the engine's own compression, friction, and lack of momentum. It takes much less energy to turn the MG1 motor while in electric mode. The charge rate is turned down to a low level allowing MG1 to rotate with less effort.
Great video. I watched an animated video years ago when we bought our 2010 prius. It illustrated the basic concept of how the system worked but left a lot to the imagination as to the actual mechanical setup. For me this video filled in the gap. Good stuff....
Glad to hear. Thanks for watching
Absolutely great video! I've got P314 in my Toyota Harrier 2015. This helps a lot to understand what is going on under the hood! Huge thanks!
Awesome video. Thank you for the clear and simple to understand explanation. Question: does the prius plug-in use the same transaxle?
+Arlen Ung Hi, no, the plug-in transaxle is very similar, but has different gear ratios to allow the engine to stay off until 61.5 mph rather than 40 mph. Thanks for watching.
Thank you for your teaching. 👋👋👋💜🌈🙏 I love Toyota 💖
Very good ! but I have to say, perhaps it is because of this rainy Sunday afternoon, but he threw me in the quickest and deepest sleep I ever experienced in my life...
Weber Inst. Thanks a lot for the videos.. they are very usefull for us, people in the third world where innovations arrive a little late but unfortunely the tecnology for repair it is only for a little groups that prefer to hidden it and be only with the truth. Thanks to you and your org. we can have a better understanding for accomlish the repair labor.
In case of electrical vehicles it will be necessary to develop an a very simple way to detect failures with help of a multimeter because other devces are or impossible to get them or innoperable due to lack of escolar education in the electrical area and in the mechanical. thanks once again...
priceless video. Thanks a lot
感恩了解，謝謝分享！
The third generation is a better output flow with less rotational speed of MG1 and much more torque overall. Very good description!
good video. thanks. excellent video
Thanks Professor Kelly. Regards, Ramish.
Thank you!
excellent!!!! greetings from mexico!!!
Hi, that is a good question. I do not know the answer to it.
Genius mechanism
good info video...thanks
Thanks for this, it is invaluable!
I have been trying to understand for ages what control is in place to determine how the planetary system acts - so how is it controlled that one part of the gearset remain stationary and the other move or these roles reversed?
Hi, yes it does.
thank you good sir
Thank you!
Great video as usual. I was a bit scared for your fingers there at times.... might want to move this to a flat solid steel bench in the future. Sfety first ;-)
Hey Prof. I'm trying to figure out the service regimes for the highlander and Prius. After how long should one flush the coolant, WS transmission fluid and engine oil in equatorial climate? Thanks
OUTSTANDING! BRAVO! CAPITAL!
Thank you!
Well done. Thanks!
This is great... thanks
Thank you so much.
Hi, thanks for you great explanation. I have several question about this 3rd generation PSD.
1. When I drive on freeway, assume the speed of vehicle is now 60mph. ICE is ON, and as you said MG2 always turning when the wheel is turning. At this moment, is MG2 powered by battery or MG2 now is a generator?
2. When we use EV mode. MG2 is turning when we start the vehicle, is MG1 powered by battery or MG1 now is a generator?
Really interesting explanation! What is the exact purpose of the oil pump, since this transmission has no metallic belts (Nissan, Toyota) or chains (Audi, Subaru)? Heat dissipation?
Yes, to circulate the fluid for cooling the stator assemblies as well as a small amount for bearing lubrication. Thanks for the feedback!
@WeberAuto. Thanks for the video. I was on the fence between getting the 2nd gen & the 3rd gen & now I'm going to pass on the 2nd gen. I also was hesitant on getting a Prius because I thought that it had a belt driven CVT. I feel a lot more comfortable about the decision now. I've also seen high mileage reviews & not one mentioned anything about the transmission or batteries failing.
Thanks, The 3rd gen is a great car
Batteries shot after 200,00 for sure.. I know.....I have a 2013 with 206,000
@@user-bb9cn9vi9t Oh wow! I've heard that they make very good rebuilt battery kits for around $1,000. I think that beats all the other fails that a regular car could have.
@Paul Stejskal No it can't, the whole point is the batteries powering the vehicle half of the time, it is more an electric vehicle with ICE assist.
07 Camry, 380000 miles, original battery still going
good description
Thank you professor.
Hey Weber mate, I've asked you about the IS300H. Im thinking if the hybrid battery pack from the LS600H can be fitted into the IS300H to create more power?
These late versions are much superior to the cone and pulley CVTs which most other cars have. There are no torque converters, gears meshing and un-meshing. None of those wear prone devices. Everything is “tight” at all times. That’s why these transmissions are so reliable.
Hi big fan of your channel. I got a question i have a 2006 Toyota Prius with p3000 p3011 p3013 codes no engine codes, but i noticed an engine low oil level when those codes appear is any possible reason for the electric motor runs all the time instead of the gasoline engine to be protected for the lack of lubrication? Thank you i appreciate your time.
Gr8 video indeed !
Very nice 👍 Sir
@WeberAuto
Dear Professor Kelly, I have 2 questions please:
How is the lubrication implemented? Is it splash lubrication? I see several caged, open deep groove ball bearings and I assume the planet gears use needle bearings.
2) I know Toyota WS (World Standard) ATF is used. How well does the lubrication work at cold temperatures? With the car stationary and the ICE idling high (1300rpm because warm-up), MG1 spins at ~4750rpm. When moving at 50mph, MG2 already spins at ~6000rpm. What if the car sat outside in winter at 5-10°F? Does the lubrication still work reliably? Would it maybe be a good idea to drive a bit slower during the first few miles?
I could not find a PID for ATF temperature to monitor how long it takes to warm up.
Thank you!
Regards
Dan
My one is 2016 and I'm wondering whether have to change the transmission fluid.Just looking about advice.
спасибо, понятно все объяснил.
When u put a new engine in do u have to line anything up with the transmission?
So, no chain, no belt, all geared.
This should be more durable than the CVT in the background that's belt driven.
Very true!
Almost no belts or chains. The 1st and 2nd gen had an internal chain link from the output of the planet gears to the differential area of the transaxle. 3rd/4th gen drives the diff directly.
@@Driver6M what does my RX450h from 2010/11 have ?
@@kubanskiloewe only gears, no moving parts expect gears
@@alanowa123 thx....now 240000 on it with first battery and i did oil change in the 2 small gear boxes front and rear.. still runs strong ;-) th-cam.com/video/3bSB_TdBA8A/w-d-xo.html
Hi ! Thanks for the in depth explanation....Can you explain the chevy volt hybrid transmisson?..it looks quite different than the Prius system
+Lakshmanan Palaniappan Hi, it is very similar to the Pruis transaxle except is has some clutch packs to prevent their MG1 from overspeed problems. The Volt also has a clutch pack to connect and disconnect the engine from the transaxle. Thanks for watching!
great explination well done job
Thank you
Keep doing a job u seems to enjoy
u are welcome sir
@@WeberAuto
Dear Professor Kelly, I have 2 questions please:
How is the lubrication implemented? Is it splash lubrication? I see several caged, open deep groove ball bearings and I assume the planet gears use needle bearings.
2) I know Toyota WS (World Standard) ATF is used. How well does the lubrication work at cold temperatures? With the car stationary and the ICE idling high (1300rpm because warm-up), MG1 spins at ~4750rpm. When moving at 50mph, MG2 already spins at ~6000rpm. What if the car sat outside in winter at 5-10°F? Does the lubrication still work reliably? Would it maybe be a good idea to drive a bit slower during the first few miles?
I could not find a PID for ATF temperature to monitor how long it takes to warm up.
Thank you!
Regards
Dan
Thank you very much!
You're welcome!
amazing