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continuously variable transmission


Greener CVT, with auxiliary gearbox, coming from Nissan and JATCO

Nissan and JATCO have just announced a new continuously variable transmission that features a wider ratio spread than any previous example of the type. The maximum spread from low to high in the past has been 6:1 but Nissan/JATCO have expanded that range to 7.3:1, a change that offers better fuel efficiency. Since this is a friction belt type CVT, expanding the ratio spread can normally be problematic because of the physical limitations of bending the steel belt around the pulleys. However, the automaker and transmissions builder have ... Read more →

What is a continuously variable transmission? Jeremy Korzeniewski

As much as many of us would love to park our fossil-fuel-burning internal combustion engines for good in favor of electric or hydrogen-powered cars, that's not likely to happen on a grand scale in ...

Nissan ekes one more mpg from Versa, Infiniti G up by two Jeremy Korzeniewski

It may not seem like much, but the single extra mile per gallon that Nissan plans to extract from its Versa subcompact will surely be appreciated by its purchasers. After all, every little bit of ...

Nissan sells over a million CVTs in 2007 Jeremy Korzeniewski

As we've reported before, Nissan is committed to the continuously variable transmission (CVT) for use in passenger cars due to the environmental improvements that the alternative transmission's ...

Editorial: Gears: The more the merrier? Jeremy Korzeniewski

Is it solely a case of one-upmanship that is driving the number of forward gear ratios forward in today's passenger cars? Or, are consumers choosing vehicles based on the number of gears in the ...

A very nice (but very expensive) automatic commuter bicycle option 2 years ago on Autoblog Green

Not too long ago we showed you a new automatic transmission that has been developed with bicycles in mind, but may very well be suitable for larger-scale machines such as motorcycles or even automobiles in the future. The transmission is now available on the Ellsworth Ride city bike. We have also ...

Video of the NuVinci continuously variable planetary transmission 2 years ago on Autoblog Green

Now this is something that is totally cool. You are probably familiar with the CVT, or continuously variable transmissions, that are becoming more commonplace on modern cars and scooters these days. The systems generally use a couple of pulleys and a belt or chain to connect the two pulleys. As ...

Ikona files provisional patents for frictionless CVT clutch and differential 3 years ago on Autoblog Green

Canadian gearing technology company Ikona Gear International announced that they have filed for two provisional patents that will help automakers produce more efficient and environmentally friendly vehicles - a frictionless CVT clutch and frictionless CVT differential. Ikona says that the ...


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