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The infinitely variable transmissions (IVT) allow the transmission ratio to vary with continuity, offering the possibility of also reaching zero values for the transmission ratio and the motion inversion. In this work the experimental results related to the performances of an IVT, obtained through the joining of a V-belt continuously variable transmissions (CVT), a planetary gear and a transmission with a constant ratio, are shown.The prototype in examination is a series-IVT with a type I power flow. Using a special test rig, the input and output IVT powers as well as the power circulating in the CVT are measured. The experimental results are compared with those obtained through a theoretical model. The torques and powers of the component CVT and those related the IVT are compared in order to evaluate their potentialities. The IVT efficiency curves, in relation to the torque and the transmission ratio variation, are finally reported and compared with those of an equivalent CVT.
The Edyson IVT can transfer substantial torque, because use only sprockets increasing relative the torque throughput, so slippage is impossible reathe others variable systems transmissions.
Because continuously variable transmissions are built with fewer parts compared to conventional transmissions, they are less expensive to manufacture. This savings is passed along to consumers in a car’s selling price. Acceleration stays in a “sweet spot” to minimize wasted power, thus improving a vehicle’s fuel efficiency.
Edyson IVT new prototype