Awd Transfer System - Subaru SVX 1992 Manual

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AUTOMATIC TRANSMISSION AND DIFFERENTIAL

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17 . AWD Transfer System

This is the electronically controlled MP-T (multi-plate

transfer) type AWD transfer system, originally designed

for SUBARU, consisting of a transfer hydraulic pressure

control unit incorporating a vehicle speed sensor, con-

trol unit, and duty solenoid and a transfer clutch (hy-

draulic multi-plate clutch) .

The control unit stores optimum transfer clutch torque

data for a variety of driving conditions . When actual

driving conditions (vehicle speed, throttle opening, gear

range, wheel slip, etc .) are detected by various sensors,

the control unit selects a duty ratio most suitable to the

given condition from the memory . It then controls the

operation of the transfer clutch by means of the hydrau-

lic pressure which controls the duty solenoid and pro-

vides optimum rear torque distribution .

Various sensors and the control unit also serve as gear

shift control, lock-up control and hydraulic pressure

The AWD transfer unit is housed in the extension case

together with the bearing, rear drive shaft, etc .

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