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Full Toroidal IVT Variator Dynamics
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 04, 2002 by SAE International in United States
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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.
CitationFuchs, R., Hasuda, Y., and James, I., "Full Toroidal IVT Variator Dynamics," SAE Technical Paper 2002-01-0586, 2002, https://doi.org/10.4271/2002-01-0586.
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