Toroidal continuously variable transmission

Details Toroidal continuously variable transmission Toroidal continuously variable transmission

1999-07-26

2000-06-27

Fenstermacher, David M.

Friction gear transmission systems or components

Fluid control

Of toroidal transmission

476 2, 476 40, 477 37, F16H 1538

Patent

active

060800798

ABSTRACT:
First oil chambers (80A) which drive a toroidal continuously variable transmission in a speed ratio decrease direction are connected to a first port (82B) of an oil pressure control valve (62) via a first passage (86A). Second oil chambers (80B) which drive the toroidal continuously variable transmission in a speed ratio increase direction are connected to a second port (82C) via a second passage (86B). The oil pressure control valve (62) selectively connects a pump port (82A, 82F, 82G) and a drain pot (82D, 82E, 82H) to the first and second ports (82B, 82C) according to the displacement of a spool (84). A damper (96, 98, 102, 108, 109, 114, 116, 120) is connected to one of the ports so as to exert a damping action on the oil passing through the oil pressure control valve (62).

REFERENCES:
patent: 4524641 (1985-06-01), Greenwood
patent: 4662248 (1987-05-01), Greenwood
patent: 5575732 (1996-11-01), Inoue
patent: 5902207 (1999-05-01), Sugihara
patent: 5935039 (1999-08-01), Sakai et al.
patent: 5980421 (1999-11-01), Machida et al.

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