The Effects of Loading Devices on the Stability of Ratio-Changing Characteristics in a Half-Toroidal CVT After Quick Torque Changes 2007-01-2131
Maintaining stability in the variator control system after quick torque changes is an important factor in achieving smooth mode changes in a power-split CVT system. In this paper, the ratio-changing characteristics of a half-toroidal CVT variator with hydraulic and mechanical loading devices are analyzed using a newly developed analytical model under dynamic load transmission. The ratio-changing characteristics of a variator with a mechanical loading device show a large overshoot after quick torque changes. In the case of a hydraulic loading device under constant application of axial pressure, it has been demonstrated that the ratio-changing characteristics are stable both theoretically and experimentally.
Citation: Miyata, S., "The Effects of Loading Devices on the Stability of Ratio-Changing Characteristics in a Half-Toroidal CVT After Quick Torque Changes," SAE Technical Paper 2007-01-2131, 2007, https://doi.org/10.4271/2007-01-2131. Download Citation
Author(s):
Shinji Miyata
Affiliated:
NSK Ltd.
Pages: 17
Event:
Non-Conference Specific Technical Papers - 2007
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 2007 Transactions Journal of Passenger Cars: Mechanical Systems-V116-6
Related Topics:
Continuously variable transmissions
Control systems
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