Browse Publications Technical Papers 2002-01-0586

Full Toroidal IVT Variator Dynamics 2002-01-0586

The present IVT (Infinitely Variable Transmission) is built around a full toroidal variator where high forces acting on low inertia characterize it as a smooth and responsive system. Because of the complex and frequent motions of the rollers, the variator dynamics plays a key role in the transmission. Furthermore, the IVT requires detailed description of the interactions between variator, driveline and hydraulic for an optimum control development. Accurate variator dynamic investigation is therefore a vital element of the modeling requirement.
A complete one-roller model of a full toroidal variator including mechanic and hydraulic parts is presented in this paper. The roller movement is described in response to a torque and a speed ratio change. A six-roller model is then introduced to highlight the difference between the rollers behavior.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 40% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.