Friction gear transmission systems or components – Fluid control – Of toroidal transmission
Patent
1994-03-30
1996-07-23
Bonck, Rodney H.
Friction gear transmission systems or components
Fluid control
Of toroidal transmission
476 42, F16H 1538
Patent
active
055384838
ABSTRACT:
A continuously variable transmission includes friction rollers which are arranged in a toroidal groove formed between input and output disks and rotatably supported by roller support members which are driven by a hydraulic cylinder device. A speed ratio control device includes a speed ratio control valve for controlling a hydraulic pressure to be supplied to the hydraulic cylinder device. A step motor has an angular position determined in accordance with a speed ratio as instructed by the speed ratio control device, and serves to drive the valve sleeve in a predetermined axial direction. A low switch serves to stop the valve sleeve, and effects a changeover between different positions of the switch when the valve sleeve has reached a position where the speed ratio becomes the lowest.
REFERENCES:
patent: 4905529 (1990-03-01), Nakano
patent: 5083473 (1992-01-01), Nakano
patent: 5136890 (1992-08-01), Hibi et al.
patent: 5419746 (1995-05-01), Nakano
Kobayashi Katsuya
Nakano Masaki
Bonck Rodney H.
Grabow Troy
Nissan Motor Co,. Ltd.
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