Hydraulic control system for an infinitely variable belt-drive t

Details Hydraulic control system for an infinitely variable belt-drive t Hydraulic control system for an infinitely variable belt-drive t

1984-03-22

1987-02-24

Dorner, Kenneth J.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

474 18, 474 28, B60K 4112, B60K 4118

Patent

active

046448276

ABSTRACT:
A system for controlling the transmission ratio of an infinitely variable belt drive transmission having a primary pulley, a secondary pulley, a belt engaged with both pulleys, a pressure oil circuit having a pump for supplying pressure oil, and a transmission ratio control valve responsive engine speed for controlling the pressure oil and for changing the transmission ratio. The system has an electronic control circuit responsive to ignition pulses of the engine for producing output pulses dependent on the engine speed, and an electromagnetic valve responsive to the output pulses for controlling the amount of pressure oil applied to the transmission ratio control valve, thereby controlling the transmission ratio in dependency on the engine speed.

REFERENCES:
patent: 4369675 (1983-06-01), Van Deursen
patent: 4387608 (1983-06-01), Mohl et al.
patent: 4459879 (1984-07-01), Miki et al.
patent: 4487303 (1984-12-01), Boueri et al.
patent: 4506563 (1985-03-01), Hiramatsu
patent: 4513639 (1985-04-01), Hiramatsu
patent: 4515041 (1985-05-01), Frank et al.

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