Configuration Analysis of a Spherical Traction Drive CVT/IVT 2004-40-0009
Infinitely variable transmission (IVT) characteristics are typically obtained by utilizing a planetary gear set in a split-power transmission configuration. The spherical traction CVT developed by Fallbrook Technologies is kinematically analogous to a variable planetary gear set. The combinations of multiple inputs, outputs, and different internally parallel architectures combine to create hundreds of CVT, IVT, and/or split-power configurations. The variable planetary configuration is inherently power dense and creates a compact, low cost IVT, potentially without the need for dual paths. The control of this novel variator is inherently stable because ratio control is independent of load.
Brad Pohl, Matthew Simister, Robert Smithson, Don Miller
Fallbrook Technologies, Fallbrook Technologies Inc.