Boosted brake having a feeler provided with a stud

摘要

A brake system having a master cylinder ( 14 ) actuated by a moving piston ( 24 ) that is fixed to a moving partition ( 18 ) in a booster ( 12 ). Piston ( 24 ) has a front face ( 26 ) that acts on a primary piston ( 30 ) of the master cylinder ( 14 ) by way of a reaction disk ( 28 ) located between a rear end of the primary piston ( 30 ). The front face ( 26 ) has a feeler ( 44 ) that is fixed to a control rod ( 36 ) of the booster ( 12 ) and comes into contact with the reaction disk ( 28 ) to transmit a reaction force from the master cylinder ( 14 ) to the control rod ( 36 ). The front end ( 48 ) of the feeler ( 44 ) includes at least one stud ( 50 ) which projects parallel to the axial direction and engages the reaction disk ( 28 ) to provide for proportionality between the force that is transmitted between the control rod ( 36 ) and the force exerted on the primary piston ( 30 ).