Frequency-selective vibration damper for motor vehicles having a bypass control valve

A vibration damper, comprising:

• a damper tube including an interior space at least partially filled with damping fluid;
• a piston rod movable back and forth within the damper tube;
• a working piston movable jointly with the piston rod, whereby the interior space of the damper tube is divided into a piston-rod-side working space and a piston-rod-remote working space,
• a damping module configured for the frequency-dependent control of a comfort bypass path formed between the piston-rod-side working space and the piston-rod-remote working space and which comprises a comfort path via which damping fluid can be caused to flow hydraulically in parallel with respect to the flow through the working piston,
• a single-piece control piston which is received, such that it can perform stroke movements, in the damping module and which, remote from the piston rod, delimits a pressure chamber arranged in the damping module, wherein the pressure chamber comprises no more than a single opening, wherein the single opening is configured to permit fluid to enter and exit the pressure chamber, wherein the opening is in fluid communication with the piston-rod-side working space,
• wherein the damping module comprises a damping module housing, with a housing cover and with a housing pot attached to the housing cover and arranged remote from the piston rod, comprises the control piston and comprises at least one first disk valve assembly, wherein the at least one first disk valve assembly, in the comfort path with the housing cover, forms a comfort valve, and the at least one first disk valve assembly comprises a bypass disk, via which damping fluid can be caused to bypass the comfort valve to flow via a bypass control path hydraulically in parallel with respect to the flow through the working piston, wherein operation of the bypass disk is regulated based on a position of the control piston.