No.1001E 2006First Edition Control Concepts of Continuously Variable Transmissions (CVT) |
| Category | TECHNICAL PAPER |
|---|---|
| Author | R. FUCHS Y. HASUDA Y. ROTHERNBUEHLER K. MATSUMOTO Mechatronic Systems R&D Department, Research & Development Center |
| Abstract | This paper gives a general overview of friction type CVTs in automotive powertrain emphasizing on the two concepts of ratio and torque control. These are described and compared from different perspectives, starting with an introduction to their most common designs, to considerations of the basic dynamics and mechanism of interaction observed in CVT powertrains. Distinctions between the two systems are identifi ed, resulting in the establishment of formal defi nitions of ratio control CVT (RC/CVT) and torque control CVT (TC/CVT). This paper is completed with a new classifi cation of transmissions including, at its root, a fi rst separation between ratio and torque control. |
| Keyword | CVT, IVT, torque control, interaction, ratio control, traction, friction |
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