BRAKING SYSTEM FOR A MOTOR VEHICLE
A braking system for a motor vehicle is divided into two modules, each module having a respective electrical pressure supply device. A separation valve is connected in a module, the separation valve having two valve seats, which can be opened at different pressure differences. This enables the functionality of two valves to be integrated in one valve.
1 - 15 . (canceled)
16 . A braking system for a motor vehicle, comprising:
a first module having at least one reservoir port and a module port;
a second module having a plurality of wheel ports;
a first electrical pressure supply device arranged in or on the first module and connected on the pressure side to the module port and connected on the suction side to the at least one reservoir port;
a second electrical pressure supply device arranged in or on the second module and connected on the pressure side to the plurality of wheel ports; and
a first separation valve connected in the second module between the module port and the wheel port;
wherein the second electrical pressure supply device is connected on the pressure side to a connection between a first separation valve and at least some of the wheel ports;
wherein the first separation valve has a first valve seat and a second valve seat, wherein the valve seats hydraulically connected in parallel with the second valve seat having a larger passage than the first valve seat;
wherein the first separation valve is normally open;
wherein the first valve seat and the second valve seat are jointly closable by actuation of the first separation valve; and
wherein the second valve seat is spring-loaded in such a way that, if the first separation valve is not actuated, the second valve seat only opens if a positive pressure on the side of the second electrical pressure supply device is less than a threshold value.
17 . The braking system as claimed in claim 16 , wherein no non-return valve is connected parallel to the first separation valve.
18 . The braking system as claimed in claim 16 , further comprising a second separation valve connected on the one hand to a connection between the first electrical pressure supply device and the first separation valve and connectable on the other hand to a brake fluid reservoir.
19 . The braking system as claimed in claim 18 , wherein, parallel to the second separation valve, a non-return valve with a passage direction from the brake fluid reservoir is connected to the connection between the first electrical pressure supply device and the first separation valve.
20 . The braking system as claimed in claim 18 , wherein the second separation valve is normally open.
21 . The braking system as claimed in claim 16 ,
wherein the module port is connected exclusively to the first electrical pressure supply device,
wherein the first electrical pressure supply device includes a breather hole, which is opened only in an inoperative state of the first pressure supply device, and
wherein the breather hole is connected to the reservoir port.
22 . The braking system as claimed in claim 16 ,
wherein at least one non-return valve with a passage direction to the second electrical pressure supply device is connected directly on the input side to the second electrical pressure supply device, and/or
wherein at least one non-return valve with a passage direction away from the second electrical pressure supply device is connected directly on the output side to the second electrical pressure supply device.
23 . The braking system as claimed in claim 16 , wherein the first module has a first control device and the second module has a second control device separate from the first control device.
24 . The braking system as claimed in claim 16 , wherein the second electrical pressure supply device is connected via a circuit separation valve to the connection between the first separation valve and at least some of the wheel ports.
25 . The braking system as claimed in claim 24 ,
wherein a first brake circuit and a second brake circuit are formed in the second module, wherein each brake circuit is assigned one or more wheel ports, and
wherein the first brake circuit is directly connected to the first separation valve.
26 . The braking system as claimed in claim 25 , wherein the second brake circuit is connected to the first brake circuit via the circuit separation valve.
27 . The braking system as claimed in claims 25 , wherein the second electrical pressure supply device is directly connected on the pressure side to the second brake circuit.
28 . The braking system as claimed in claim 16 ,
wherein an inlet valve is in each case connected between the electrical pressure supply devices and the wheel ports, and/or
wherein the wheel ports are connected via respective outlet valves to a suction side of the second electrical pressure supply device and/or to a brake fluid reservoir.
29 . The braking system as claimed in claim 16 , further comprising a connection line originating from the second module for the direct connection to a brake fluid reservoir and which is connected to a suction side of the second electrical pressure supply device and/or to outlet valves.
30 . The braking system as claimed in claim 16 ,
wherein the first electrical pressure supply device is a linear actuator, and
wherein the second electrical pressure supply device is a piston pump.