System for detecting the transmission ratio in an infinitely var

Details System for detecting the transmission ratio in an infinitely var System for detecting the transmission ratio in an infinitely var

1984-12-18

1986-10-28

Bonck, Rodney H.

Machine element or mechanism

Elements

Gear casings

74867, 474 18, 474 28, F16H 1106

Patent

active

046191577

ABSTRACT:
A system for an infinitely variable belt-drive transmission for an engine comprises a primary pulley having a hydraulically shiftable disc, a secondary pulley having a hydraulically shiftable disc, a belt engaged with both pulleys, and a hydraulic circuit having a pump for supplying oil. A transmission ratio control valve is responsive to engine speed for controlling the oil and for shifting the disc of the primary pulley to change the transmission ratio, and a pressure regulator valve is responsive to the transmission ratio for increasing line pressure in the hydraulic circuit with an increase of the transmission ratio. A sensor is engaged with the disc of the primary pulley to be moved together with the disc so as to move a spool of the pressure regulator valve to increase the line pressure with an increase of engine speed.

REFERENCES:
patent: 4152947 (1979-05-01), van Deursen et al.
patent: 4161894 (1979-07-01), Giacosa
patent: 4369675 (1983-01-01), van Deursen
patent: 4400164 (1983-08-01), Cadee
patent: 4467670 (1984-08-01), Kawamoto
patent: 4467674 (1984-08-01), van Deursen et al.
patent: 4478105 (1984-10-01), Yamamuro et al.
patent: 4494943 (1985-01-01), Takei et al.
patent: 4512751 (1985-04-01), Tanaka et al.

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