System for controlling the pressure of oil for a continuously va

Details System for controlling the pressure of oil for a continuously va System for controlling the pressure of oil for a continuously va

1988-05-24

1989-07-25

Bui, Thuy M.

Endless belt power transmission systems or components

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

Fluid pressure actuator for adjustment of member

74867, F16H 1102

Patent

active

048509370

ABSTRACT:
A continuously variable transmission has a selector device having a planetary gear device for selecting forward and reverse drives. The planetary gear device has a forward hydraulic chamber and a reverse hydraulic chamber for selectively providing a forward gear train and a reverse gear train. A high pressure oil pump is provided for supplying a transmission actuating oil having a high line pressure, and a low pressure oil pump is provided for supplying an actuating oil having a low actuating pressure. A selector valve is provided for selectively applying the low actuating pressure to the forward or reverse hydraulic chambers. A pressure increasing valve is provided for applying a higher actuating pressure to the reverse hydraulic chamber than the forward hydraulic chamber.

REFERENCES:
patent: 4478105 (1984-10-01), Yamamura et al.
patent: 4547178 (1985-10-01), Hayakawa et al.
patent: 4669336 (1987-06-01), Okada et al.

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