Patent ID: 9162661
Filing Date: 2015-10-20
Classification: B60T

Abstract:
1. An electric-servomotor vehicle brake system, comprising: a master cylinder including a primary piston delimiting therein a primary chamber connected by a brake fluid circuit to wheel brake cylinders; an electric servomotor including an actuator piston acting on the primary piston; a control rod connected to a brake pedal and displacing a plunger piston to actuate the master cylinder, when applicable with an assistance of the electric servomotor; a sensor for detecting a movement of the control rod and for informing a control circuit of the electric servomotor, wherein: a reaction spring housed in the external chamber and including an end pressing against a retaining organ integral with the skirt, wherein: a hydraulic reaction piston housed in the axial through hole of the body of the primary piston and integrally bearing an axial thrust rod on an exterior, the hydraulic reaction piston including a stop against which another end of the reaction spring rests, wherein the stop rests against the rear wall of the external chamber to one of push the primary piston and be pushed by the primary piston.