Hydraulic braking circuit

A hydraulic braking circuit comprising at least one pressurized fluid source, a master cylinder controlled by means of a pedal and with outlets connected to sub-circuits each comprising at least one brake motor, an electronic control unit, a pressure distributor whose inlets are connected to said pressurized fluid source and for distributing fluid from said pressurized fluid source, and an electrovalve which is arranged in each sub-circuit so as to establish a connection, when at rest, between the respective outlet of said master cylinder and the respective brake motor and, in an activated position, between a respective outlet of said distributor and the respective brake motor, said distributor being pressure piloted and comprising a control chamber connected selectively to said pressurized fluid source and to a reservoir of low-pressure fluid by means of at least one solenoid valve which is controlled by said control unit, said control unit controlling simultaneously the activation of each said electrovalve and including said solenoid valve which controls the functioning of said distributor, and said control chamber communicating on one side with pressure retaining means and on the other side with a piston comprising slide valve means of said distributor, such that said slide valve means of the distributor is pressure piloted by operation of the solenoid valve and fluid from the pressurized fluid source distributed to the electrovalve of each sub-circuit.