Reaction disc for pneumatic braking assistance servomotor in automotive vehicle, optimizes functioning of servomotor and especially of three-way-valve ensuring hermetic isolation of front and rear chambers of servomotor

摘要

The reaction device includes a reception chamber having a reaction disc in an incompressible material, a plunger application surface (or a similar unit connected to a control unit, such as a brake pedal, advantageously connected to a three-way valve of an assistance servomotor). There is a push rod application surface (or a similar unit for transmitting force from the master cylinder, especially a tandem master cylinder). There is also a work pressure application surface, for work pressure exerted on the reaction disc in order to be elastically deformable during braking more or less during emergency braking.