Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Fluid pressure actuator for adjustment of member
Patent
1985-10-02
1987-02-10
Leppink, James A.
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 1104
Patent
active
046420690
ABSTRACT:
A hydraulic control system for a continuously variable transmission having a first and a second variable-diameter pulley provided on a first and a second shaft, a transmission belt connecting the first and second pulleys to transmit power from one of the first and second pulleys to the other, and a pair of hydraulic cylinders for changing an effective diameter of the pulleys engaging the belt. The hydraulic control system includes a hydraulic source delivering a pressurized fluid, and a flow control device for controlling a flow of the pressurized fluid from said hydraulic source into one of said hydraulic cylinders, and a flow of the fluid from said one hydraulic cylinder, thereby changing the effective diameters of the pulleys to vary a speed ratio of the transmission. The control system comprises a pressure regulating device for regulating the pressurized fluid which is delivered from the hydraulic source and applied to the flow control device so that a pressure of the pressurized fluid is higher than a pressure in the above-indicated one hydraulic cylinder by a predetermined value.
REFERENCES:
patent: 4512751 (1985-04-01), Tanaka et al.
patent: 4551119 (1985-11-01), Sugaya et al.
patent: 4584909 (1986-04-01), Abo et al.
Imai Ryuji
Sawada Daisaku
Soga Yoshinobu
Sugaya Masami
Leppink James A.
McKenzie, Jr. Frank H.
Toyota Jidosha & Kabushiki Kaisha
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