System for controlling line pressure of a continuously variable

Details System for controlling line pressure of a continuously variable System for controlling line pressure of a continuously variable

1987-01-02

1988-02-16

Braun, Leslie

Machine element or mechanism

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

Preselected indexed position

3644241, 192 0075, B60K 4118, B60K 4112

Patent

active

047247240

ABSTRACT:
A control system for a motor vehicle provided with a continuously variable transmission and with an electromagnetic clutch for transmitting torque of an engine to the transmission. The transmission has a line pressure control valve having ports and a spool, a hydraulic circuit for supplying oil to the line pressure control valve so as to shift the spool to control the line pressure. When the clutch is slipping at the start of the vehicle, the line pressure control valve is controlled in accordance with a clutch transmitting torque. When the clutch is engaged, the control valve is controlled in accordance with an engine torque.

REFERENCES:
patent: 4466521 (1984-08-01), Hattori et al.
patent: 4542665 (1985-09-01), Yamamuro et al.
patent: 4610183 (1986-09-01), Nobumoto et al.
patent: 4665773 (1987-05-01), Hiramatsu et al.
patent: 4671138 (1987-06-01), Nobumoto et al.

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