Hydropneumatic suspension unit as well as hydropneumatic suspension system

Abstract

A hydropneumatic suspension system arranged on a bogie for a vehicle, particularly for a rail vehicle, and one hydropneumatic suspension unit respectively which is contained in the suspension system. For this purpose, the spring accumulator, the reservoir, the tank and the control unit are arranged in the area of the at least one spring strut, so that an essentially self-sufficient suspension unit is obtained. The suspension system may be used and connected to a levelling unit.

1 . A hydropneumatic suspension unit for use on a rail vehicle between a bogie and a car body of the rail vehicle, the unit comprising: 
 a spring accumulator,    a reservoir;    at least one spring strut;    a tank;    a control unit for controlling the level of the at least one spring strut; and    wherein the spring accumulator, the reservoir, the tank and the control unit are arranged in the area of the at least one spring strut.    
     
     
         2 . The hydropneumatic suspension unit according to  claim 1 , wherein the spring accumulator, the reservoir, the tank and the control unit are arranged on both sides of a spring strut axis.  
     
     
         3 . The hydropneumatic suspension unit according to  claim 1 , wherein the spring accumulator, the reservoir, the tank and the control unit are arranged in a star-shaped manner around the at least one spring strut.  
     
     
         4 . The hydropneumatic suspension unit according to  claim 1 , wherein the spring accumulator and the reservoir are connected directly on the at least one spring strut, while the tank and the control unit are arranged adjacent thereto on the bogie or on the car body and are connected by a connection line with the at least one spring strut.  
     
     
         5 . The hydropneumatic suspension unit according to  claim 1 , wherein the spring accumulator, the reservoir, the tank and the control unit are connected directly on the at least one spring strut.  
     
     
         6 . A hydropneumatic suspension system for a rail vehicle, comprising; 
 at least two suspension units according to  claim 1 , which are arranged on both sides on the car body of the vehicle; and    a levelling unit coupled with the at least two suspension units.    
     
     
         7 . The hydropneumatic suspension system according to  claim 6 , wherein the levelling unit is located separate from the at least two suspension units on the bogie or on the car body.  
     
     
         8 . The hydropneumatic suspension system according to  claim 6 , wherein the levelling unit is located with one of the suspension units.  
     
     
         9 . The hydropneumatic suspension system according to  claim 6 , wherein the levelling unit is electronically coupled with the at least two suspension units.  
     
     
         10 . The hydropneumatic suspension system according to  claim 6 , wherein in that the levelling unit has one differential-pressure control valve respectively for each suspension unit, and the differential-pressure control valves are mutually connected by pressure gauge lines.  
     
     
         11 . The hydropneumatic suspension system according to  claim 6 , wherein the levelling unit has one differential-pressure control valve respectively for each suspension unit; the differential-pressure control valves are connected with the suspension units by hydraulic lines; and the tanks of the at least two suspension units are connected with one another by way of a hydraulic line.  
     
     
         12 . The hydropneumatic suspension system according to  claim 5 , wherein the levelling unit, for each suspension unit, has one differential-pressure control valve respectively assigned to the respective suspension unit, each differential-pressure control valve is connected by a hydraulic line with a suspension unit on the other car body side; and the tanks of the at least two suspension units are connected with one another by a hydraulic line.  
     
     
         13 . A bogie for a rail vehicle including a hydropneumatic suspension system according to claim  6 .