| 摘要 |
System for the secondary suspension of a superstructure ( 1 ) of a rail vehicle, having a hydropneumatic spring unit ( 3 ), with an assigned suspension accumulator ( 7 ) as an active spring element, placed between the superstructure ( 1 ) and a bogie ( 2 ) arranged below it, which active spring element ensures at least one raised travelling level (N<SUB>F</SUB>) for the superstructure during the travel of the rail vehicle, in which case, by way of the hydropneumatic spring unit ( 3 ), by means of a level control, in addition to the raised travelling level (N<SUB>F</SUB>), a lowered station platform level (N<SUB>B</SUB>) for the superstructure ( 1 ) can also be adjusted, the suspension accumulator ( 7 ) being blockable when the rail vehicle is stopped in order to relieve the level control during a change of load, and in that, for an emergency operation caused by a pressure drop, additionally at least one emergency spring cylinder ( 18 ) is provided which, in the event of a pressure failure, by means of an independent moving-out, ensures an emergency spring level (N<SUB>N</SUB>) situated between the station platform level (N<SUB>B</SUB>) and the travelling level (N<SUB>F</SUB>).
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