Control device for a vehicle brake system, and method for operating a vehicle brake system

摘要

A control device is described for a brake system of a vehicle, having a valve control device that is designed to determine, at least taking into account a provided information signal relating to a generator braking moment of a generator that is currently being exerted or is to be exerted, a first target state of a first valve of the brake system that is connected to a master brake cylinder of the brake system and to a fluid storage device of the brake system in such a way that a brake fluid volume can be displaced out of the master brake cylinder into the fluid storage device via the first valve, which is controlled into an at least partly open state, and to output a first control signal, corresponding to the first target state, to the first valve, the first target state being determinable, by the valve control device, for a valve connected via at least one intake line to a brake medium reservoir of the brake system as fluid storage device, as first valve. In addition, a method is described for operating a brake system of a vehicle.

主权项

1. A control device for a brake system of a vehicle, comprising:
a valve control device for determining:
a first target state of a first valve of the brake system that is connected to a master brake cylinder of the brake system and to a fluid storage device of the brake system so that a brake fluid volume can be displaced out of the master brake cylinder into the fluid storage device via the first valve, the first valve being controlled into an at least partly open state;wherein:
the valve control device determines the first target state using a provided information signal relating to a generator braking moment of a generator that is one of currently being exerted and to be exerted;the valve control device outputs a first control signal, corresponding to the first target state, to the first valve; andvia the valve control device, the first target state can be determined for the first valve connected, via at least one intake line, to a brake medium reservoir of the brake system as the fluid storage device;a second target state of a second valve of the brake system, situated as separating valve between the master brake cylinder and a brake circuit of the brake system having the first valve and having at least one wheel brake cylinder;wherein the valve control device:
determines the second target state using at least one of a first sensor signal relating to at least one actuation strength of an actuation of a brake actuating element of the brake system, the information signal, and the first target state;outputs a second control signal, corresponding to the second target state, to the second valve; andcompares the first sensor signal with a specified comparison signal with regard to a minimum actuation strength from which a driver's braking force applied to the brake actuating element can be transmitted to a displaceable master brake cylinder piston of the master brake cylinder, wherein a supporting force can be exerted on the displaceable master brake cylinder piston of the master brake cylinder even when the actuation strength is lower than the minimum actuation strength, and;
if the first sensor signal is below the comparison signal, the valve control device controls the second valve into an at least partly open state so that the brake fluid volume pressed out of the master brake cylinder can be displaced into the brake circuit via the second valve; andif not, the valve control device controls the second valve into a closed state so that a hydraulic connection between the master brake cylinder and the brake circuit is prevented.