Method for determining a brake pressure and pressure-medium-actuated brake device

A pressure-medium-actuated brake device, which is provided with at least one control which receives and processes wheel speed signals from wheel speed sensors as input signals, of a vehicle, wherein a brake actuator is associated in each case with wheels of the vehicle and there is associated in each case with at least some wheels of the vehicle a wheel speed sensor which produces wheel speed signals which correspond to the wheel speed, and wherein the brake device is configured

• a) to determine or estimate a first brake pressure for a first brake actuator, which is included by the brake device, of at least a first wheel, on which during a braking operation and/or while a control which processes wheel speed signals is carried out a brake pressure build-up is necessary and on which no first wheel speed sensor is provided or a first wheel speed sensor is provided but does not provide any or any error-free first speed signal;
• b) to determine, measure or estimate a second brake pressure for a second brake actuator, which is included by the brake device, of at least one second wheel during the braking operation and/or while the control is carried out and with which wheel there is associated a second wheel speed sensor which provides a wheel speed signal;
• and
• c) to determine or estimate the first brake pressure in accordance with the second brake pressure.