The invention relates to a master brake cylinder (1), in particular a tandem master brake cylinder for a hydraulic motor vehicle brake system, which is impinged upon preferably by a pneumatic brake booster (2), comprising at least one piston (4,5) which is displaceable in a housing (3) and has in each case a plurality of follow-up connections (14,15), said follow-up connections allowing a hydraulic connection between the pressure chamber (6,7) and a pressureless follow-up chamber (16,17) at the start of a braking operation. According to the invention, at least some of the follow-up connections (14,15) are configured as axial grooves and are formed in an outer lateral surface of at least one piston (4), lead with one end to the piston edge (8) and with another end in each case to a control edge (18) in the lateral surface in a main plane E1, which is arranged in parallel and at a distance (S1) to the piston edge (8) and the overtravel thereof by the sealing collar (12) defines a closure path of the piston (4). In order to allow a smooth, quiet and yet sufficiently reliable braking initiation, it is proposed according to the invention that the piston (4) comprises further follow-up connections (14) which are configured as axial grooves and are formed in the outer lateral surface of the piston (4), lead with one end to the piston edge (8) and with another end in each case to a control edge (18) in the lateral surface of the piston (4) in at least one further plane (E2), which is arranged in parallel to the main plane (E1) and in an offset manner relative to the piston edge (8).
MASTER BRAKE CYLINDER FOR A HYDRAULIC MOTOR VEHICLE BRAKE SYSTEM
2015-09-30
Patent
Electronic Resource
English
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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