Brake pressure controller for motor vehicle with antilock braking - guarantees voiding of wheel brakes by overlap of control surfaces dependent on pressure at piston step

摘要

Two coaxial pistons (1,4) slide within a valve housing (2). The outer piston (4) is stepped (3) near the seating (15) of a spherical closure element (7) between master cylinder and wheel cylinder pressure spaces (13,14), and has a control surface (19) varying the cross section of the radial mouth (11) of the outlet space (18). - Two fixed springs (5,6) act from opposite directions on the closure element (7) and on the inner piston (1).