Subaru LEGACY 2002 Quick Reference Index page 430

Brakes
2) Operation at the split point pressure
When pressure "P " increases to the split point pressure, force "f
2
sectional area "A" has been selected so that the force is generated starting with the split point
pressure.) The pressure pushes the piston rightward, overcoming spring force "F". As a result, the
valve seat moves together with the piston rightward and comes in contact with the valve, blocking
the passage toward the rear wheel cylinders.
(1) To rear wheel cylinder
(2) From master cylinder
(3) Seat
3) Operation after reaching the split point pressure
Immediately before the fluid passage toward the rear wheel cylinders is closed, pressure "P
slightly higher than pressure "P
the fluid can flow to the wheel cylinders. However, as soon as pressure "P
the valve closes.
This cycle is repeated as long as the pedal is depressed further, but pressure increasing rate of
the rear wheel cylinders is smaller than that of the front wheel cylinders.
PROPORTIONING VALVE
". So the piston can move in the spring force acting direction and
3
BR-10
" is generated. (Piston's cross
2
(4) Spring
(5) Piston
(6) Valve
" becomes equal to "P
2
H4H1399B
" is
2
",
3