The invention relates to a method for operating a recuperative brake system comprising the steps of: increasing a generator braking torque and defining a desired value (110) with respect to one of a master brake cylinder (18) and / or at least one brake circuit (10, 12) in at least one Storage volume (48a, 48b) to be displaced brake fluid volume in consideration of the increased generator braking torque and a predetermined hydraulic action characteristic (108), reducing the generator braking torque and transferring the previously in the at least one storage volume (48a, 48b) transferred brake fluid volume at least partially from the at least one storage volume (48a, 48b) in the at least one brake circuit (10, 12), determining at least one reaction variable (124) with respect to a hydraulic response of the brake system, and redefining the hydraulic action characteristic (108) of Braking system taking into account at least the minima at least one determined reaction size (124). Furthermore, the invention relates to a control device (100) for a recuperative braking system.
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