Line-Pressure Control - Subaru SVX 1992 Manual

3- 2 [IV122B41 AUTOMATIC TRANSMISSION AND DIFFERENTIAL
4. LINE-PRESSURE CONTROL
1) The oil pump delivery pressure (line pressure) is
regulated to the constant pilot pressure by the pilot
valve.
2) The pilot pressure applied to the pressure modifier
valve is regulated by the line pressure controlling duty
solenoid A and changed into the pressure modifier
pressure .
3) The pressure modifier valve is an auxiliary valve for
the pressure regulator valve, and it creates a signal
pressure (pressure modifier pressure) for regulating the
line pressure to an optimum pressure corresponding to
the driving conditions .
4) This pressure modifier pressure is applied to the
pressure regulator valve to control the oil pump delivery
pressure .
5) The delivery pressure of the oil pump is regulated to
an appropriate pressure (line pressure) corresponding
to the driving condition to reduce the loss in the oil
pump driving time and acceleration shock .
6) The pressure modifier pressure regulated by the
pressure modifier valve is smoothed by the pressure
modifier accumulator and pulsation in the line pressure
is eliminated .
Duty solenoid A
B3-515
Fig. 61
84