Patent ID: 8342615
Filing Date: 2013-01-01
Classification: B60T

Abstract:
1. A braking system for motor vehicles comprising: a master cylinder to which wheel brake circuits are connected, a first piston which is coupled to a brake pedal via a pressure rod which transmits actuating forces, a second piston configured to actuate the master cylinder, a third piston which is configured to be actuated by the first piston and which is configured to be connected in a force transmitting fashion to the second piston, a simulation device with at least one elastic element which, in a brake-by-wire operating mode, generates a pedal sensation that can be felt by a driver of the vehicle, an intermediate space, to which hydraulic pressure is applied, between the second piston and third piston, wherein an application of pressure to the intermediate space loads the second and third pistons in opposite directions, a pressure generating device which controls the pressure in the intermediate space, a pressure medium reservoir vessel under atmospheric pressure and configured to be connected hydraulically to the intermediate space, means for electrically controlling the pressure in the intermediate space, wherein the pressure medium which is required to electrically control the pressure applied to the intermediate space is kept available under atmospheric pressure, and selectively placed under a higher pressure, in the pressure generating device, wherein a hydraulic pressure chamber is formed in the third piston, and a hydraulic simulator chamber connected to the hydraulic pressure chamber via a disconnectable hydraulic connecting line, the hydraulic simulator chamber bounded by a hydraulic simulator piston which is connected in a force transmitting fashion to the at least one elastic element of the simulation device.