Control cylinder for a steering system of a motor vehicle

Steering system for a motor vehicle comprising:

• a steering column part that is at least axially adjustable, and
• a control cylinder aligned at least approximately axially parallel with and articulatedly connected with the column part, said control cylinder being articulatedly connected to a vehicle body part,
• said control cylinder including:
• a cylinder housing in which a piston part attached to a piston rod is mounted in a linearly displaceable manner, said piston part dividing a cylinder chamber within the cylinder housing into two working chambers axially opposite one another, said chambers being filled completely with a damping medium, with the piston part having at least one through-flow cross section connecting the working chambers together, said cross section being closable by at least one sealing member,
• wherein the at least one sealing member includes a flexible sealing lip, said lip in its unloaded resting position keeping the through-flow cross section open and, upon an abrupt relative movement being deformable by the level of an impact load into a closed position that substantially seals off the through-flow cross section, with the resistance to deformation of the sealing lip being chosen so that the sealing lip remains in its resting position during normal adjustments between the piston rod and cylinder housing.