Device for the secondary suspension of a coach body in a rail vehicle with an active spring element

摘要

Device for the secondary suspension of a coach body (1) in the case of a rail vehicle, with a between the car body (1) and a, which is arranged underneath the bogie (2) placed hydropneumatic spring unit (3) with an associated suspension reservoir (7) as an active spring element, which during the travel of the rail vehicle travel at least an elevated level (n_F) for the car body, characterised in that, via the hydropneumatic spring unit (3) by means of a level control, in addition to the raised trip level (n_F) also a recessed web dough level (n_B) for the car body (1) is adjustable, wherein the suspension reservoir (7) in the standstill of the rail vehicle is 22 abrasion is also reduced, in order to relieve the level control in the case of load change, and that for an emergency operation caused by loss of pressure in addition, at least one auxiliary spring cylinder (18) is provided, which in the case of pressure failure by automatic extension a between the web dough level (n_B) and the trip level (n_F) downstream of the emergency spring level (n_N) ensures.