Method for electronically regulating the braking force distribution in a pressure medium-activated brake system of a vehicle and pressure medium-activated brake system of a vehicle having such a regulating means

A pressure medium-operated brake system of a vehicle having at least one front axle brake circuit, which is associated with a front axle, and at least one rear axle brake circuit, which is associated with at least one rear axle, comprising:

• an electronic regulating device for providing a brake force distribution, so that when the brake system is operated, a rear axle brake pressure, which acts in the at least one rear axle brake circuit, is regulated to prevent locking of the rear wheels before locking of the front wheels;
• and
• at least one pressure switch, which is is provided in a brake circuit, which pressure switch generates an activation signal for activating the electronic regulating device for providing the brake force distribution depending on a pressure value, which acts in the brake circuit, in relation to a prespecified pressure threshold value;
• wherein the electronic regulating device is configured so that the brake pressure at the rear axle is limited only while the activation signal is generated or is present, and wherein the brake pressure at the rear axle is not limited if an activation signal is not generated or is not present,
• wherein the brake circuit in which the pressure switch is provided is the rear axle brake circuit, and
• wherein the pressure switch is configured so that it delivers the activation signal when a pressure value, which acts in the rear axle brake circuit, falls below its switching pressure and which otherwise does not deliver an activation signal of this kind.