Damping force control type hydraulic shock absorber for suspension system in vehicles, has plunger with large diameter attraction head which enters or withdraws from tubular projection, when coil is energized

摘要

A plunger (59) slides in magnetic path formed by a tubular core (101) arranged at upper end of a coil (73). An attraction core (104) placed in lower end of the coil, attracts plunger, when coil is energized. The plunger has large diameter attraction head (59b) which enters or withdraws from tubular projection (104a) formed on the flange of the attraction core. An independent claim is also included for solenoid operated driving apparatus.