Stepless belt transmission

Details Stepless belt transmission Stepless belt transmission

1986-01-23

1988-01-05

Novosad, Stephen J.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Fluid pressure actuator for adjustment of member

F16H 5552

Patent

active

047173688

ABSTRACT:
A stepless belt transmission includes a working fluid control unit having a supply port for supplying working fluid to a hydraulic actuator, a discharge port for discharging the working fluid from the hydraulic actuator, a lead mechanism for changing the working fluid pressure internally of the hydraulic actuator by varying the opening degree of the supply port or discharge port in dependence upon vehicle running conditions, and a follow-up mechanism operatively associated with a movable flange displaced by the changed working fluid pressure to restore the port opening degree varied by the lead mechanism. It is possible to achieve highly sophisticated control of transmission ratio in dependence upon vehicle running conditions through a comparatively simple construction and on the basis of a simple control method in which the stroke of the lead mechanism is suitably regulated.

REFERENCES:
patent: 4228691 (1980-10-01), Smirl
patent: 4400164 (1983-08-01), Cadee
patent: 4560369 (1985-12-01), Hattori
patent: 4583423 (1986-04-01), Hahne
patent: 4585430 (1986-04-01), Gaddi

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