The first is the geometric configuration of the drive, which is based on differing contact radii of a sphere. Two factors allow the NuVinci CVP to provide a continuously variable ratio range in a compact package. As a result, the NuVinci CVP offers seamless and continuous transition to any ratio within its range, thus maximizing overall powertrain efficiency, with no jarring or shocks from the shifting process, and improving acceleration, performance and overall vehicle efficiency. Tilting the balls changes their contact diameters and varies the speed ratio. The NuVinci CVP uses a set of rotating and tilting balls positioned between the input and output discs of a transmission. 3 Comparing the NuVinci CVP to other CVTs.2 Comparing the NuVinci CVP to conventional transmissions.NuVinci CVPs are also currently under development for other products including residential wind power turbines, light electric vehicles, outdoor power equipment, and automotive front-end accessory drives. The NuVinci CVP currently is available on bicycles manufactured and sold in the U.S., Europe and Asia as well as in developer kit form for automatically shifted applications.
Since then, the NuVinci CVP and bicycles equipped with it have been the recipients of several awards, including a 2007 R&D 100 Award, a 2007 Popular Science Best of What’s New, 2007 Technology of the Year and Bike of the Year in The Netherlands, and an iF Design EUROBIKE Gold 2008 Award.
The NuVinci CVP was first available in December 2006 for bicycles in The Netherlands. A CVP is a type of CVT that also provides functionality of a planetary or epicyclic gear set.įallbrook has stated that the word "NuVinci" refers to Leonardo da Vinci who, in 1490, developed a drawing describing how a CVT might work. The NuVinci continuously variable planetary (CVP) transmission is a specific type of continuously variable transmission (CVT) developed by Fallbrook for vehicles and machines. NuVinci is the brand name used to identify the transmission manufactured and marketed by Fallbrook Technologies Inc.
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