Niveauregelventil für Luftfedern

摘要

A leveling valve (10) for vehicle air springs has an elongated body (15) in which an actuating mechanism (70) is mounted at one end and a valve means (19,24) at the other end with a dampener (50) and a pilot-operated dump means (23) located between the actuating mechanism and the valve means. An elongated plunger (40) extends from the actuating means to the valve means through the dampener and the pilot-operated dump means. One end of the plunger (40) is attached to the actuating mechanism (70) which includes a sleeve (71) slidable on the plunger and on the opposite sides of which are located coil springs (73,74) for maintaining the neutral position of the plunger and valve means. The springs provide a means for permitting over-travel of the actuating mechanism when the plunger reaches its limit of travel and also assist a dump piston (23) in overriding the actuating mechanism. The dampener (50) provides a time delay in the actuating of the plunger (40) which also provides a means for minimizing fluctuations in the actuation of the valve means caused by a vehicle encountering large bumps in the road. The dampener (50) is formed of two transparent parts (51,52) between which is located a piston (54) and a viscous fluid (57) visible through the transparent parts. The actuating means (70) includes rotatable eccentric means (81a,82a,81b,82b) on each side of the sleeve (71) adapted to actuate the sleeve and a forked actuator arm (14) having two arms (14a,14b) connected to each of the rotatable eccentric means.