The invention relates to a control device (24) for a brake system (10) of a rail vehicle (100), wherein the brake system (10) comprises a friction bracket device which is dependent on frictional engagement. The control device (24) is configured to determine a braking effect applied during a braking process, on the basis of a brake pressure or brake current and at least one further parameter. In addition, the invention relates to a brake system (10) having such a control device (24), and to a method for determining a braking effect.
