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1. (WO2006118270) FULL-TOROIDAL CONTINUOUSLY VARIABLE TRANSMISSION

Pub. No.:    WO/2006/118270    International Application No.:    PCT/JP2006/309031
Publication Date: Nov 9, 2006 International Filing Date: Apr 28, 2006
IPC: F16H 15/38
Applicants: JTEKT Corporation
株式会社ジェイテクト
FUCHS, Robert
フックス ロバート
HASUDA, Yasuhiko
蓮田 康彦
Inventors: FUCHS, Robert
フックス ロバート
HASUDA, Yasuhiko
蓮田 康彦
Title: FULL-TOROIDAL CONTINUOUSLY VARIABLE TRANSMISSION
Abstract:
A full-toroidal continuously variable transmission has a hydraulic actuator (20) for applying pressing force to a pair of disks (5, 15) through a roller (17). The hydraulic actuator (20) includes first and second oil chambers (23, 24). The pressing force of the hydraulic actuator (20) is produced by a pressure difference between the oil chambers (23, 24). A directional control valve (29; 29P; 29Q) causes a hydraulic pressure source (25; 25P; 25Q) to be connected to either of the oil chambers, and an oil tank (26) is connected to the other oil chamber. An intermediate section (27a; 27Pa, 27Qa) of a feeding path (27, 27P, 27Q) and an intermediate section (28a; 28Pa; 28Qa) of a discharge path (28; 28P; 28Q) are connected by a communication path (32; 32P; 32Q), where the two intermediate sections are corresponding to each other. A check valve (33; 33P; 33Q) for permitting a flow of operation oil only to the feeding path side (27, 27P, 27Q) is provided in the communication path (32; 32P; 32Q). A flow restriction (34; 34P; 34Q) is provided in the discharge path (28; 28P; 28Q). The flow restriction (34; 34P; 34Q) is placed more on the downstream side than the intermediate section (28a; 28Pa; 28Qa) of the discharge path (28; 28P; 28Q).