Baja F4-2.5L SOHC (2003)
1. Operation before the split point
The piston is held pressed toward the left by the spring so that the valve is kept away from its seat.
Under this condition, fluid pressure "P3" to the rear wheel cylinders is equal to fluid pressure "P2" from the master cylinder.
2. Operation at the split point pressure
When pressure "P2" increases to the split point pressure, force "f2" is generated. (Pistons cross 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.
3. Operation after reaching the split point pressure