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TEAM Industries licenses NuVinci continuously variable transmission technology for light vehicle applications

Fallbrook Technologies Inc. and TEAM Industries, Inc. (TEAM) announced that their development partnership has continued to progress and the two have entered into an exclusive licensing arrangement for the use of NuVinci CVP (continuously variable planetary) technology in North America and Europe for electric and gasoline light vehicle applications. (Earlier post.)

TEAM and Fallbrook began working together in 2011 to validate the benefits of the NuVinci technology for TEAM’s products.

The licensing arrangement between TEAM and Fallbrook includes exclusive manufacturing rights for TEAM’s light utility and recreational vehicle families for North America and Europe and includes an engineering services agreement (ESA) for the development of a NuVinci vehicle transmission, with development running through 2013 and into 2014. The agreement also provides for royalties with commercialization volume milestones beginning in 2015.

TEAM is the largest supplier of rubber belt continuously variable transmissions (CVTs) to the All-Terrain Vehicles (ATVs), Utility Terrain Vehicles (UTVs), Low/Medium Speed Vehicles (LSVs/MSVs), and Neighborhood Electric Vehicles (NEVs) markets, all of which are included in Fallbrook’s license to TEAM.

First commercialized in a continuously variable transmission (CVT) for bicycles, now in its second generation as the NuVinci N360, NuVinci Technology is applicable to a wide variety of applications including bicycles, light electric vehicles, primary transmissions for automobiles, trucks and commercial vehicles, lawn care equipment and wind turbines.

Instead of the traditional gear and clutch mechanisms found in conventional transmissions, a NuVinci transmission utilizes a set of rotating spheres that are arranged around a central “sun” that transfers torque between two “rings.” Tilting the spheres changes their contact diameters on the rings, permitting an infinite progression of speed ratios. The result is a smooth, seamless and continuous transition to any ratio within its range, maximizing overall powertrain efficiency and ride quality.



I've never fully understood a toothless, gear less metal-to-metal contact any ratio transmission, but best wishes.


Basically they rely on high pressure between the smooth surfaces instead of teeth to transmit torque without slippage.

Since there are no teeth, the different ratios can be achieved by utilizing continuously variable diameters of the "wheels".

The planetary arrangement provides the high pressure required by a tight 360 degree squeeze from the outer ring rather than high loads carried thru bearings.

Most (all?) use elastohydrodynamic liquid(EHL); an EHL acts as a premium slippery lubricant UNTIL it is squeezed between the two opposing metal surfaces, the great pressures turn it into a glassy solid for a microsecond or 2 so slip is minimized.

Presently the most common CVT is the metal belt type. A strong belt under high tension inside many metal "blocks" between two "V belt" pulleys transmits the power. The two pulleys (which can adjust to provide variable diameter to the "belt") must maintain the high tension and the metal blocks transmit the power on the compression side of the loop (maybe so wear or sudden torque overload does not imbed the blocks into the pulleys? Just guessing).

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