| 摘要 |
PCT No. PCT/DE93/00671 Sec. 371 Date Mar. 30, 1994 Sec. 102(e) Date Mar. 30, 1994 PCT Filed Jul. 30, 1993 PCT Pub. No. WO94/03340 PCT Pub. Date Feb. 17, 1994The body of a rail vehicle is lowered when it is stationary to facilitate ingress and egress. The body is raised in preparation for motion to provide satisfactory road clearance. In one embodiment of the invention, a lifting cylinder, in series with a supplementary spring, is extended during travel, and is contracted when the rail vehicle is stopped. In other embodiments, a hydraulic cylinder, either alongside, or coaxial with the supplementary spring, compresses the supplementary spring when the rail vehicle is stopped. In a further embodiment, the hydraulic cylinder is replaced with an electromechanical adjusting element such as a screw drive. A control system, preferably actuated by unlocking and locking of the door opening lock, actuates the lowering and raising of the body. |
