ELECTROHYDRAULIC DRIVE OF ROLLING BRAKE Russian patent published in 1994 - IPC

FIELD: automotive engineering. SUBSTANCE: drive has casing accommodating chamber of fluid tank and cavity of main brake cylinder, and stepped rod connecting piston with coupler. Positioned between the chamber of the fluid tank and pre-piston cavity of main braking cylinder is a distribution arrangement comprising sleeve whose interior accommodates spring-loaded pusher member having shaped surface cooperating with locking member of cut-off valve received in radial passage of annular recess having interior communicating with hydraulic line of wheel braking cylinders. Upper end of pusher member extends through axial discharge passage provided in the body of the sleeve. End surface of this passage serves as a seat of limit valve for the pusher member to engage with blocking element in the form of a ball affixed to the end of lower arm of transmission lever cooperating with rod of electromagnet. Winding of the electromagnet is brought into the circuit of stop-light. Lower part of the pusher member extends through cover plate of sleeve interior, and its end carries a washer functioning as a cut-off element of safety valve. EFFECT: improved braking efficiency. 3 dwg