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1. (WO2018172060) METHOD FOR OPERATING A BRAKING SYSTEM AND BRAKING SYSTEM

Pub. No.:    WO/2018/172060    International Application No.:    PCT/EP2018/055438
Publication Date: Fri Sep 28 01:59:59 CEST 2018 International Filing Date: Wed Mar 07 00:59:59 CET 2018
IPC: B60T 8/40
Applicants: CONTINENTAL TEVES AG & CO. OHG
Inventors: KOHL, Andreas
WICKENHÖFER, Thorsten
Title: METHOD FOR OPERATING A BRAKING SYSTEM AND BRAKING SYSTEM
Abstract:
The invention relates to a method for operating a braking system (2) for motor vehicles, comprising hydraulically actuatable wheel brakes (42, 44, 46, 48); an electrically controllable pressure-providing device (20) for hydraulically actuating the wheel brakes (42, 44, 46, 48); an actuating device, which can be actuated by means of a brake pedal (6) and which comprises a tandem master brake cylinder (10), which has a primary pressure chamber (120), a secondary pressure chamber (122), and a floatingly mounted secondary piston (142), the primary pressure chamber (120) being able to be hydraulically separated from a first set of the wheel brakes (42, 44) by means of a first separating valve (180), which is open when not supplied with current, and the secondary pressure chamber (122) being able to be hydraulically separated from a second set of the wheel brakes (46, 48) by means of a second separating valve (182), which is open when not supplied with current; a pressure medium reservoir (18), which is under atmospheric pressure and which is hydraulically connected to the secondary pressure chamber (122) of the master brake cylinder (10) in the unactuated state of the secondary piston (142); a hydraulically designed simulator (14), the braking system (2) being activated in order to actively build up pressure in the wheel brakes (42, 44, 46, 48) in a by-wire operating mode by means of the pressure-providing device (20), the second separating valve (182) being opened in the by-wire operating mode in the event of an excess of pressure medium in the wheel brakes (42-48) if a release of the brake pedal (6) by the driver is detected such that excess pressure medium can flow into the secondary pressure chamber (122).