Dual-Cavity Half Toroidal CVT for Passenger Cars

Paper #:
  • 922105

Published:
  • 1992-09-01
Citation:
Nakano, M., Hibi, T., and Kobayashi, K., "Dual-Cavity Half Toroidal CVT for Passenger Cars," SAE Technical Paper 922105, 1992, https://doi.org/10.4271/922105.
Pages:
10
Abstract:
This paper presents a method for obtaining a large-capacity, high-efficiency continuously variable transmission (CVT). In designing a dual-cavity half toroidal CVT, it is essential to balance the load forces of each cavity. The axial position of the inner output disks has an important effect on the load forces. Several dual-cavity layouts designed to maintain the necessary balance are discussed, and an optimum layout is proposed that meets three required conditions. One is that the inner output disks should be supported by a wall separating the cavities. The second is that the outer input disks should have identical rotational phases. The third is that a single loading cam should produce all the contact forces. Tests of the proposed layout indicate that it provides good synchronization of all power rollers.
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