Hydraulic actuator for active ride suspension.

摘要

An oil pressurized telescoping actuator (11) for active ride vehicle suspension having a folded dual piston (18,20) design with an inner piston (32) stroking within the rod (34) of an outer piston (40) to foreshorten overall length. A special universal joint (28) provided for a larger tolerance so that three bearing surfaces (36,49,54) will not encounter binding. The upper mount (146) accommodates the upper end cap (26) of the actuator which extends therethrough to further foreshorten the assembly. The entire assembly is jacketed (102) to provide a reservoir (108) connected to a drain line (110,112) so that leakage oil can be pressurized by a pump into the system for pressurized feed into the actuator for powered expansion and contraction of the actuator for level ride for all vehicle manoeuvres.