How Toyota Hybrid System Work Part 3 Hybrid Transmission
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Published 2020-10-23
In this brand new series I will go over all components of the hybrid system explaining their basic function in a simple way that's easy to understand. The theme of this series is simple but complicated.
The hybrid system in Toyota cars is super complicated and a marvel of engineering. In this series I try to keep things simple and light so Toyota Hybrid owners can see how their cars work.
I believe if you know how your car works you'll be able to utilize all it's features better and better understand your hybrid Toyota.
In this part of the series I will cover a very controversial subject. The hybrid transmission. Is it a CVT? eCVT? Or not? I'll explain how the transmission works including the electric motors MG1 and MG2. Also explain the components of the transmission. I'll also cover some maintenance items and mistakes that can happen like using CVT transmission fluid in your Hybrid transmission.
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All Comments (21)
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That hybrid transmission is something special. When you look how simple it is, yet how flawlessly it performs and reliable it is, it's a really incredible piece of engineering. It's an insult to call it a CVT.
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Toyota Hybrid systems are the pinnacle of system engineering.
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Seeing you discuss the Prius CVT made me want to share my thoughts on it. What's called a planetary in the video is a differential, a differential is only planetary gears. Differentials are used in all cars to keep power applied to the drive wheels equally while turning corners. You may remember a time when one drive wheel slips in mud or snow and the other wheel goes nowhere. So imagine a rear wheel drive car with one rear tire removed and pretend the car magically stays suspended. Then disconnect the hand brake from the wheel thats on the ground and leave it attached only to the floating brake hub. Put the car in gear and try to drive it. It won't go anywhere. Like in the snow, the hub will only just spin because of the differential. Then start applying the hand brake to that hub, slowing it down, and the differential will put torque on the other wheel. The car will go and you can control the engine rpm and vehicle speed with the combined use of the gas pedal and the handbrake. If you put enough pressure on the handbrake so that the hub completely stops, the differential will pass all the power to the drive wheel. That's the principle behind the Prius CVT. Now replace the handbrake with a generator and instead of creating a lot of heat with the handbrake you create electricity with the generator. Increasing the field current of the generator produces more electricity and puts more of a load on the differential. Consequently more torque is applied to the other wheel. Of course, the electricity needs a place to go so put a motor directly on the other wheel, a battery to store fluctuations of demand, a computer to control the whole system, and you have a Prius! No friction parts in the CVT since it's only basically a differential. When slowing, the engine stops, the generator just spins with no field current, and the motor acts as a generator, charging the battery while slowing the car. Finally the brakes bring the car to a stop. So the Prius actually has two differentials (planataries), one is the CVT and the other is just the usual one on the wheels. All elegantly put into the same shell with the motor and generator. To recap, the CVT differential has three shafts, the engine, the generator, and the motor which is always connected directly to the usual wheel differential.
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Amazing series. Everything I wanted to understand but no one at our local Toyota dealership had any clue about. Fantastic.
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Prof John Kelly does a excellent job of disassembly of a Toyota E-CVT at the Weber Auto channel.
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Enjoying every bit of this explanation of Hybrid technology. What a marvel of engineering!
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Thank you, great work! Clear, simple and to the point. And not to much input to get an understanding how things work.
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man i just love your sense of humor. besides all the important stuff that you've been talking about since the first video, i subscribed to your channel because of your humor and that you always ask God to keep us safe (",)
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This is one of the best videos on hybrid systems.
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Hello: Great explanation. Thank you. I am looking forward to see more of your videos. Take Care and wish you well.
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A simple explanation of a complicated thing. Great video, thanks!
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Thank you for this series. The engineering of this technology is amazing.
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You have my gratitude amd appreciation. I felt like one of my elder brothers explaining. Comfortable pace to comprehend.
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I ALWAYS learn something new & useful watching your product videos ! Keep them rolling Mr CCN . 👌
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Yes, I learn something new from this video.Your explanation are easy to follow. Thanks a lot.
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The more I know about my toyota corolla hybrid the more I love it. Thanks for sharing your knowledge
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Excellent delivery! Great job explaining.
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So glad I’ve found this channel
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I love your videos and i watch every single video. I am Continuing learning so many thing....
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I keep watching . And I keep thanking you.
