A brake system of a rail vehicle comprising a pneumatic friction brake device that is dependent on non-positive engagement and transfers a force for braking via a wheel-rail contact, the pneumatic friction brake device comprising at least the following: a) at least one friction brake device having at least one force generator that is designed to convert a pneumatic brake pressure supplied to it into a braking force and/or a braking torque in order to actuate friction elements (12, 14; 13, 15) of the friction brake device, b) a brake pressure sensor device that is designed so as to measure the pneumatic brake pressure by means of at least one brake pressure sensor , c) a braking effect sensor device that is designed so as to measure the braking force exerted by the friction brake device and/or the braking torque exerted by the friction brake device by means of at least one braking effect sensor that is separate from the at least one brake pressure sensor , d) an electronic control device that is designed so as to receive braking effect data from the at least one braking effector sensor and braking pressure data from the at least one brake pressure sensor , to match the braking pressure data to the corresponding braking effect data and to monitor the matched braking pressure data and braking effect data, characterised in that e) the electronic control device takes the form of an electronic brake control device that actuates a control valve device that is connected to a compressed-air storage device from which it takes compressed air in order to make it available to the at least one force generator during braking, the control valve device having at least one solenoid valve that can be actuated by the electronic brake control device , f) the electronic brake control device being able to actuate components of the brake system, the brake system comprising a magnetic track brake device, a linear eddy-current brake and/or a retarder device in addition to the pneumatic friction brake device that is dependent on non-positive engagement. a) at least one friction brake device having at least one force generator that is designed to convert a pneumatic brake pressure supplied to it into a braking force and/or a braking torque in order to actuate friction elements (12, 14; 13, 15) of the friction brake device, b) a brake pressure sensor device that is designed so as to measure the pneumatic brake pressure by means of at least one brake pressure sensor , c) a braking effect sensor device that is designed so as to measure the braking force exerted by the friction brake device and/or the braking torque exerted by the friction brake device by means of at least one braking effect sensor that is separate from the at least one brake pressure sensor , d) an electronic control device that is designed so as to receive braking effect data from the at least one braking effector sensor and braking pressure data from the at least one brake pressure sensor , to match the braking pressure data to the corresponding braking effect data and to monitor the matched braking pressure data and braking effect data, characterised in that e) the electronic control device takes the form of an electronic brake control device that actuates a control valve device that is connected to a compressed-air storage device from which it takes compressed air in order to make it available to the at least one force generator during braking, the control valve device having at least one solenoid valve that can be actuated by the electronic brake control device , f) the electronic brake control device being able to actuate components of the brake system, the brake system comprising a magnetic track brake device, a linear eddy-current brake and/or a retarder device in addition to the pneumatic friction brake device that is dependent on non-positive engagement. <EOS>