A hydraulic braking system for motor vehicles, comprising a master cylinder (12) and a brake booster (11), wherein the brake booster (11) includes: a slidable piston assembly (15, 20) configured for defining, in a body (13) of the brake booster (11), a first and a second chamber (25, 28) arranged to be supplied with pressurised hydraulic fluid; means associated with the piston assembly (15, 20) for setting up and cutting off, depending on the operation phases of the brake booster (11), a communication between the first chamber (25) and the second chamber (28) and a communication between the second chamber (28) and an exhaust chamber (29); and means (41, 43) for transferring to a slidable piston (61) of the master cylinder (12) a braking force, applied to a brake pedal (22) connected to the piston assembly (15, 20) and possibly boosted in the brake booster (11), and for transferring to the piston assembly (15, 20) of the brake booster (11) a reaction force exerted on the piston (61) of the master cylinder (12), consequently to a sliding of the same piston caused by the braking force, by hydraulic fluid present in said master cylinder (12). The means for transferring a braking force include an elastomeric disc (43) arranged between the piston assembly (15, 20) and a pushing member (41) for the piston (61) of the master cylinder (12) and arranged to be deformed either by the piston assembly (15, 20) for transferring the braking force to the piston (61) of the master cylinder or by the pushing member (41) for transferring the reaction force to the piston assembly (15, 20), respectively. In the hydraulic system, the master cylinder (12) and the brake booster (11) are arranged to operate with a first and a second mutually incompatible hydraulic fluid, respectively, and a gasket (69) positioned along a body (14) of the master cylinder (12) and a partition (46) sealingly mounted in the body (13) of the brake booster (11) are placed between the exhaust chamber (29) and a closed end (63) of the body (14) of the master cylinder (12) and are arranged to define, with the end (63) of the body (14) of the master cylinder, a separation chamber (49) arranged to mutually isolate spaces in which the first or the second fluid, respectively, are present, the separation chamber (49) being provided with a discharge duct (50) for discharging fluid leaked from either space. A method of brake boosting in such a system is also provided.


    Access

    Download


    Export, share and cite



    Title :

    Hydraulic braking system and method of brake boosting in a motor vehicle


    Additional title:

    Hydraulisches Bremssystem und Verfahren der Bremsverstärkung in einem Kraftfahrzeug
    Système de freinage hydraulique et procédé de suralimentation de freinage dans un véhicule automobile


    Contributors:

    Publication date :

    2018-10-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



    BRAKE BOOSTING SYSTEM, BRAKING METHOD AND ELECTRIC VEHICLE

    LIU FENGYU / YING ZHUOFAN / LIU XIAOKANG | European Patent Office | 2024

    Free access

    BRAKE BOOSTING SYSTEM, BRAKING METHOD AND ELECTRIC VEHICLE

    LIU FENGYU / YING ZHUOFAN / LIU XIAOKANG | European Patent Office | 2021

    Free access

    BRAKING DEVICE FOR A HYDRAULIC MOTOR VEHICLE BRAKE SYSTEM

    SCHIEL LOTHAR | European Patent Office | 2019

    Free access

    BRAKING DEVICE FOR A HYDRAULIC MOTOR VEHICLE BRAKE SYSTEM

    GONZALEZ JOSE / KREH HEINRICH / MESSNER ADRIAN et al. | European Patent Office | 2018

    Free access

    Braking device for a hydraulic motor vehicle brake system

    GONZALEZ JOSE / KREH HEINRICH / MESSNER ADRIAN et al. | European Patent Office | 2020

    Free access