A vibration damper for a motor vehicle, said vibration damper comprising:
- a cylinder;
- hydraulic damping fluid;
- said cylinder being configured to contain said hydraulic damping fluid;
- said cylinder comprising a first end and a second end;
- said first end of said cylinder being configured and disposed to operatively connect to a first part of a motor vehicle;
- said second end of said cylinder being disposed opposite said first end of said cylinder;
- a piston rod;
- said piston rod sealingly projecting into said second end of said cylinder;
- said piston rod comprising a first end and a second end;
- said first end of said piston rod being configured and disposed to operatively connect to a second part of a motor vehicle;
- said second end of said piston rod being disposed opposite said first end of said piston rod;
- a piston;
- said piston being disposed on said second end of said piston rod;
- said piston being configured and disposed to slide within said cylinder;
- said piston being configured and disposed to divide said cylinder into a first chamber and a second chamber;
- an electromagnetic valve;
- said electromagnetic valve being configured and disposed to control flow of said hydraulic damping fluid from at least one of said first chamber and said second chamber;
- said electromagnetic valve comprising a magnetic path to permit passage of magnetic flux in said electromagnetic valve;
- said magnetic path comprising a stator structure;
- said stator structure comprising a magnetic coil to generate magnetic flux upon application of electrical current to said electromagnetic valve;
- said magnetic path comprising an armature structure;
- said armature structure being configured and disposed to be moved by magnetic flux generated by said magnetic coil of said stator structure to control flow of said hydraulic damping fluid through said electromagnetic valve;
- said stator structure comprising a cover member;
- said cover member comprising a first member;
- said cover member comprising a second member;
- said armature structure being configured and disposed to permit passage of magnetic flux between said first member and said second member through said armature structure;
- said electromagnetic valve comprising a magnetic and hydraulic insulator arrangement;
- said magnetic and hydraulic insulator arrangement being disposed between said first member and said second member;
- said magnetic and hydraulic insulator arrangement being configured to direct passage of magnetic flux between said first member and said second member through said armature structure and to minimize direct passage of magnetic flux between said first member and said second member;
- said magnetic and hydraulic insulator arrangement comprising at least one seal;
- and
- said at least one seal of said magnetic and hydraulic insulator arrangement being configured to seal said hydraulic damping fluid from entering said magnetic coil of said stator structure.