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

1989-07-11

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

74730, F16H 1102

Patent

active

048467650

ABSTRACT:
A continuously variable transmission has a torque converter with a lockup clutch. A high pressure oil pump is provided adjacent the transmission and a low pressure oil pump is provided adjacent the torque converter. A line pressure control valve is provided for controlling the pressure of oil supplied from the high pressure oil pump to produce a line pressure for operating the transmission. A lockup control valve operated by low pressure oil supplied from the low pressure oil pump is provided for controlling the lockup clutch, and a solenoid operated valve is provided to generate a converter condition pressure for operating the lockup control valve, for operating the lockup clutch. The converter condition pressure is applied to the line pressure control valve so as to increase the line pressure.

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

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