System for controlling the transmission ratio of an infinitely v

Details System for controlling the transmission ratio of an infinitely v System for controlling the transmission ratio of an infinitely v

1984-08-24

1987-05-12

Braun, Leslie

Machine element or mechanism

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

Preselected indexed position

74866, 474 28, B60K 4116

Patent

active

046639918

ABSTRACT:
A system for controlling the transmission ratio of an infinitely variable transmission has a primary pulley having a hydraulically shiftable disc and a hydraulic cylinder for operating the disc, a secondary pulley having a hydraulically shiftable disc and a hydraulic cylinder for operating the disc and a belt engaged with both pulleys, and a hydraulic circuit. The system further comprises a transmission ratio control valve for controlling the fluid applied to the hydraulic cylinder of the primary pulley and for shifting the disc of the primary pulley, and devices for detecting conditions of engine operation and for producing electrical signals.
An electric control unit responds to the electrical signals to produce control signals. A solenoid operated valve is provided to respond to the control signals to control the transmission ratio control valve so as to control the transmission ratio by the pulleys.

REFERENCES:
patent: 4152947 (1979-05-01), Van Deursen et al.
patent: 4387608 (1983-06-01), Mohl et al.
patent: 4458318 (1984-07-01), Smit et al.
patent: 4458560 (1984-07-01), Frank et al.
patent: 4459879 (1984-07-01), Miki et al.
patent: 4475416 (1984-10-01), Underwood
patent: 4509125 (1985-04-01), Fattic et al.

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