Deceleration-responsive braking corrector

A deceleration-responsive braking corrector for a brake system of a vehicle, comprising a body having a chamber, an inlet connected to the chamber and intended to be connected to a pressurized fluid source, an outlet connected to the chamber and intended to be connected to brakes of the vehicle, characterized in that the corrector comprises a mass which is mounted slidably inside the chamber and movable in response to deceleration of the vehicle, a pressure responsive piston engaging and pushing the mass toward a rest position and forming a closure element for a shut-off valve of a nonrestricted first passage connecting the chamber with the outlet, and a by-pass second passage connecting the chamber with the outlet and having a restriction which bypasses the shut-off valve and which can be sealed off and closed by the mass when the mass moves in response to deceleration, so that closure of the shut-off valve and nonrestricted first passage is effected initially by means of the pressure responsive piston being displaced by pressure and sealing off closure of the restriction occurring sequentially thereafter and effected by the mass.