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Error in torroidal graphics : Last graphic has high and low gear wrong ... Low gear is when the drive disk is spinning faster than the driven disk and vice versa ...

Are There Any Good CVT's? Yes, for snowmobiles, no for everything else. Had to sell a brand new ATV with one, couldn't stand the noise.

Explained the function of CVT types fairly well, with the exception of the e-CVT. A planetary gear was mentioned, but how it is connected to both the gas engine or electric motor(s) was not addressed. It seems both Honda and Toyota have something like this (with dual clutches?) in their newest hybrids. Why do they even need a transmission, when there is an electric motor? The gas engine could just generate electricity to power the electric motor(s), (just like an all electric car works), or recharge the battery when current demand for the electric motor is not high...

Planned obsolesce. Don't last long and are expensive to replace.

Chain final drive creates grease spray and a chain requires cleaning and greasing. I never owned a bike with a driveshaft. My current bike is belt witch only requires cleaning with soap and water. My belt life is 16000 miles. I vote belt.

I finally found a great video. I appreciate how it transitions from old to new technology. This gradual progression helps with understanding by introducing complexity step-by-step, explaining the issues they overcame or improvements made. The complexity of the topic was also very well presented.

average bmw driver experience

😂3

You replace chains and belts. But you dont replace a drive shaft.

The diagrams for the toroidal transmissions appear to be reversed at 15:51. Low-speed / high-torque is transposed for high-speed / low-torque. Please correct me if I am wrong.

Shaft drives are good for the guy that doesn't know how to work on his own bike.

Shaft drives are good for the guy that doesn't know how to work on his own bike.

I do wish these people would stop telling you all that all CVT transmissions have variable pulleys and belts. Both Honda and Toyota do not use pulleys and belts on their new transmissions. They use a cunning double epicyclic gear arrangement, that runs in oil. Toyota also uses Atkinson cycle petrol engines, not Otto cycle. These give a thermal efficiency close to a diesel engine, so more MPG.

My moms car was smoking but no lights or red lights pop on the dashboard.

can u share the gear ratio table

cvt is other trick to make cars irreparable so they can sell you a full gearbox . planned obsolescence it at its top.

T

CVT = Continuously Variable Trash

Completely wrong your suggestion! D-cvt came more recently, Toyota's launch gear had existed long before. Because the purpose of this is mainly to increase RATIO COVERAGE. If you select relatively wide range pulley set with only CVT, that means the angle of V-shaped set of cones would become more ACUTE. That leads to inefficient because the required force of hydraulic piston(variator) needs to be high, hence parasitic load of hydraulic pump affects overall fuel economy. D-CVT is Daihatsu's great invention, and probably intellectual property of them. Not to mention they're Toyota group. Ratio coverage is sufficiently wide and throttle response and efficiency is great! It's sad that limited number of cars are available for foreign market.

I love the presentation ❤

I still don’t like them.

Good vid, but e-CVTs got short shrift. Is a planetary system with motor and engine as two inputs and the tires as the output. By running various motor speeds, you get different "gears". Also most CVTs have computer programming that simulates normal transmission shifting. This takes away most of the efficiency of CVTs. In these cases, the CVT operates just as an inexpensive auto trans with gears.

As a Automotive Technician since 1986 I can say with confidence that all need to go back to the drawing board as they truly have longevity problems when compared to the old ways of doing things. Most CVT's simply will not make it too 100k miles no matter how well they are taken care of, some don't even make it too 60k miles. The problem as I see it is they oil used and the cooling system for the transmission oil needs to be redone as the oil breaks down as these type of transmissions get a lot hotter than a standard automatic type transmission and once the oil breaks down it no longer does it's job for the transmission and failure is all but guarantied.

I like it good for me

In at least 2 of your examples, when efficiency is needed, these transmissions resort to gear sets. I doubt any of these can match a standard 'gearbox' with a clutch which is far easier to replace than the inner parts of CVT's. Friends and I have attained nearly 200,000 thousand miles on one clutch. One was my work truck. People are apparently willing to deal with very complex, high maintenance transmissions, rather than learn how to use 'old tech' transmissions with a clutch.

Thats my hand shifting the gears 😮

So they just created a CVT and started adding starting gear into it, and gears that work at higher speeds? They'll soon go full circle and just make it a manual :o

I got my first CVT in my new car last year and I love it BUT I did research the various CVTs as I noticed that some version fail with very low milage and made sure to get the E CVT with the additional of the superb Toyota Hybrid system. The only thing to get used to is the engine rpm which often is higher compared to my previous Manual car.

Dual camshaft engine design are found in sport cars. Typically, with racing cars, because they require better acceleration and speed. Like he said, DOHC engines, ultimately have better performance.

They do vl

Shaft depends on how good the shaft construction is, BMW hasnt always hit the target - as an example. I would trust any Yamaha with shaft but for others you should look up model specific problems/issues.

Fiat and Ford were the early adopters of metal belt CVT. Also , Metal belt driven CVT works in compression. The DAF variomatic works in tension.

The US government banned it because it had no park gear? Well now I feel stupid because I drive a car with a manual transmission and it has no park gear. I had no idea I was putting my life at risk.

My 2017 civic turbo coup has a CVT. It pulls until I let off and I put 2,000 miles a month on it. Cars been awesome. When I'm not stomping on it, it'll Driving Miss Daisy around town smooth.

Are these the warning lights that that if you get a dangerous place

Tried one , never ever will I personally buy one . Just no fun to drive at all.

My Bugatti has 16 cylinder wow 😂🥵🤙🔥

Thanks bro today I found it today 😂

it has a Toyota that looks like a suzuki

11:29 Toyota Launch Gear

Only the eCVT is reliable

❤សួស្តី

When a 6lb battery can move a 3000lb vehicle 20/25 miles in snow, freezing cold, sizzling heat, up or down a mountain and still run the heater , AC, radio , power steering and other misc. accessories, like a convertible top movement or cell phone charging then Ev will have a chance, Maybe. There will still be charging issues , battery replacement issues and of course the ridiculous cost issues. Basically that's the E=mc2 of electric vehicles.

The manufacturing facility I worked at used hundreds of positive-infinitely-variable (PIV) transmissions to tweak the relative speeds of machine components and to control the overall speed of the machine. At its peak usage, we had a mechanic whose sole job was rebuilding PIV's. The company (with redesigns from the engineering staff of which I was a member) eliminated PIV's. The result was greatly reduced downtime and repair costs and an increase in productivity. CVT's provide a slight improvement in fuel efficiency by keeping the engine at the most efficient operating speed, but it is at the cost of higher maintenance expenses and shorter life expectancy. Except for the E-CVT, which has no belt, all CVT technologies are a step in the wrong direction for the consumer. My wife and I have considered a new vehicle. I have two requirements: 1) naturally asperated (no turbo); and, 2) NO CVT. (I might--MIGHT--consider a hybrid, but that's iffy.)

Love chains primarily becasue of the maintenance. Nothing like getting your hands dirty on a weekend cleaning and oiling your chain. The direct performance advantage is just that, added advantage.

I guess it's in the name

SOHC, only sports car engines or motorports stuff needs DOHC

IMO the Toyota e-CVT is superior to all other cvt's. It uses no belt drive and is very reliable. Another aspect of the HSD e-CVT is it's simplicity, there is not much that could go wrong. And looking at the entire Toyota/Lexus hybrid car it does away with some traditional components like a separate alternator + belt drive. It has no separate startermotor. Both functions are integrated in the HSD. No clutch or torque convertor either. (no need for it because the e-moter has torque from 0rpm onward) From an engineering point of view it's brilliant and arguably the BEST product Toyota ever made.

for scooters that's ok but i don't like it in cars. because it's using a steel belt, if there is a single tooth on those steel belt gets loose it will wreck havoc inside the cvt transmission, like chain reaction of hundreds of pieces inside the transmission some can cause dents or scratches on the pulleys, which you will also need to replace, because it will have uneven surface.