Hydraulic vibration damper for cars has at least first bypass channel controlled after closed position of valve slider with constriction remote from valve slider.

摘要

A hydraulic vibration damper for cars has a cylinder (1) containing a damping fluid and located inside it, a sealed piston rod (2) which can slide axially. At its lower end is fastened a damping piston (3) which divides the cylinder space into two working spaces 94,5). The damper is provided with variable passages which are controlled by throttle valve bodies and additionally a bypass for the pressure and tension stage, whose bypass cross-section is adjusted by a solenoid valve working in three or more stages. Its annular coil opens a valve slide more or less, whereby two or more bypass openings are freed one after the other. At least the first bypass channel 927) controlled after the closed position of the valve slider 913) has a constriction (33) remote from the valve slider.