Subaru SVX 1992 Manual page 839

BRAKES [M4B1] 4-4
4 . Proportioning Valve
FB - - . OPERATION
A: GENERAL
1 . OPERATION UNDER NORMAL CONDITIONS
The proportioning valve for dual piping systems is
1) Below the "split" point, the valve piston is held open
adopted for controlling the braking force .
by spring tension so that it is contact with the cylinder
body . Under this condition, brake fluid pressure in the
Valve piston
Connector
Master
cylinder
(Secondary)
Valve spring
Inner piston
Stop plate
Circlip ~~
Balance spring
Spring
Retainer
Master
cylinder
(Primary)
Valve
+ Rear wheel
7 cylinder
-O-ring
-Outer cup
- Inner cup
I
I
I
+ Rear wheel
cylinder
C4-507
Fig . 13
In case of failure
in one circuit
/
7
C
U
H
Split point /
3 a
'
/ ' T
Z=
/ When both circuits
are normal
0 Master cylinder fluid pressure
In case of split point 2,942 kPa (30 kg/cm=, 427 psi)
C4-552
Fig. 14
master cylinder is maintained equal to fluid pressure in
the rear wheel cylinders .
r Valve
Cylinder body
I
a Rear wheel
cylinder
Master
O
cylinder
(Secondary)
Valve piston _
Ir11
0 I
~
0
~ - - Spring O -- O
C
--~
1 L
T-
O~
--
Master c-=
0 cylinder __ _
(Primary)
Rear wheel
7 cylinder
C4-509
Fig. 15
9