초록 ▼

A brake system comprises a tandem master cylinder (24) with working pistons (19, 27), each of which confining a working chamber (25, 29). Upstream of the tandem master cylinder (24) a power booster (1) is connected which is connected to an auxiliary energy source (8) for the pressure supply. Connect

A brake system comprises a tandem master cylinder (24) with working pistons (19, 27), each of which confining a working chamber (25, 29). Upstream of the tandem master cylinder (24) a power booster (1) is connected which is connected to an auxiliary energy source (8) for the pressure supply. Connected to the booster chamber (3) are valves (22, 23) which are controllable by the pressure of the booster chamber (3) and by which a pressure medium communication may be established from the auxiliary energy source (8) to the working chambers (25, 29) of the tandem master cylinder (24) and a dynamic inflow of pressure medium takes place.

대표청구항 ▼

A brake system for automotive vehicles, which is provided with a master brake cylinder and with a working piston confining a working chamber and communicating with at least one pressure chamber of a wheel brake and which is provided with a power booster connected upstream of the master brake cylinde

A brake system for automotive vehicles, which is provided with a master brake cylinder and with a working piston confining a working chamber and communicating with at least one pressure chamber of a wheel brake and which is provided with a power booster connected upstream of the master brake cylinder and connected to an auxiliary energy source for the purpose of pressure supply, wherein valve means (22, 23) are connected at a booster chamber (3) which are controllable by the pressure of the booster chamber (3) and by means of which a pressure medium connection is established from the auxiliary energy source (8) to at least one working chamber (25) of the master brake cylinder (24), at the same time an annular surface (127) of the working piston (19) is pressurized in the brake\s release direction, wherein the valve means comprise a first valve arrangement and a second valve arrangement (22 and 23), the first valve arrangement (22) comprising an arrangement controlling the pressure of the auxiliary energy source (8) and the second valve arrangement (23) comprising a valve (80) opening in the dependence on the pressure of the auxiliary energy source (8), and, wherein the first valve arrangement (22) has a control chamber (64) communicating with a pre-pressure chamber (13) and confined by a control piston (59) on the one side and by a valve piston (65) on the other side, the control piston (59) being caused by a spring (62) acting in the direction of the valve piston (65) to rest at the valve piston (65) and the valve piston (65) blocking the connection from the auxiliary energy source (8) to a compensation reservoir (9) by way of a valve member (69) and releasing the same, when the force required for closing the valve member (69) and acting on the valve piston (65) is smaller than the force required for opening the valve member (69).