A vacuum brake booster assembly and master cylinder brake

摘要

A set of vacuum brake booster and master brake (23) cylinder, said brake booster a movable partition (46) which is fastened sealingly to the box servo (1) and a control box (7) which cooperates with said movable partition (46) and containing a double valve (8, 13, 19) and a valve piston (9) sliding by the action of a piston rod (11) acting the end of said valve piston ( 9) side of the master cylinder via a reaction device (10) on a push rod (12), which in turn drives the stepped piston (25) of the push rod of the master cylinder (23) this flanged to one of the housing halves (16) of the box servo, characterized master cylinder being characterized by said push rod (12) is subject to said control box (7) through a cap (21) secured to said housing control (7), proveyéndose between said cap (21) and said push rod (12) an axial clearance (x) whereby said push rod (12) can be moved relative to said control box (7) in the longitudinal direction of the case, and acting said cap (21) together with a sleeve (27), to cause the displacement of said push rod (12) relative to said control box (7), actuates a first valve (26, 27) connecting to an annular chamber (28) behind the wide step (a, 29) of said piston (25) of said push rod with the pressure chamber (40) of the primary circuit via a conduit (36, 36 '') is in said piston (25) of said push rod, and through a second valve (32) closes an inlet nozzle (31) located between the nozzle connection (30) with a fluid reservoir and said annular chamber (28).