Legacy Brighton Wagon AWD F4-2.5L SOHC (2000)
2. Operation near the split point
-
Force "f1", applied to piston by spring, is one-half of spring force "F". In other words, "f1" = "F".
-
Force "f2" is also applied to piston in the direction opposite to spring force "F" due to fluid pressure "P2" generated by master cylinder
according to cross sectional area "A".
-
Force "f2" increases respondingly with fluid pressure "P2". When "f2" is greater than, piston moves in direction opposite to spring force "F".
This causes valve to come in contact with valve seat, blocking fluid passage.
3. Immediately before fluid passage is closed, fluid pressure "P2" is held equal to pressure "P3". When brake pedal is depressed to increase fluid
pressure "P2", piston moves in the same direction as spring force "F", opening fluid passage.
However, since fluid passage is closed again immediately after pressure "P2" equals "P3", pressure "P3" is held at a value of less than pressure
"P2".