Control arrangement for a hydropneumatic suspension system and hydropneumatic suspension system comprising such a control arrangement

A hydropneumatic suspension system, comprising:

• a pump for pressure generation,
• a reservoir for hydraulic fluid, and
• at least one suspension cylinder that has a piston chamber which carries a suspension load, and which is acted upon by a piston chamber pressure and is connected to a first hydraulic accumulator,
• an annular chamber that sealingly surrounds a piston rod of the at least one suspension cylinder, which is acted upon by an annular chamber pressure and is connected to a second hydraulic accumulator, and
• a control arrangement, the control arrangement comprising:
• a pressure supply connection for connecting to a pressure supply,
• a return connection,
• a piston chamber connection adapted to be connected to the piston chamber of the at least one suspension cylinder and adapted to be acted upon by the piston chamber pressure,
• an annular chamber connection adapted to be connected to the annular chamber of the at least one suspension cylinder and adapted to be acted upon by the annular chamber pressure,
• at least one controllable valve arrangement that comprises a plurality of switch positions via which the pressure supply connection and the return connection are connectable to the piston chamber connection and the annular chamber connection,
• the annular chamber connection being in flow connection with the return connection via a first pressure-limiting line, and
• a hydraulically controllable pressure-limiting element provided in the first pressure-limiting line, said pressure-limiting element having a control input adapted to be acted upon via a control line by a control pressure that corresponds to the piston chamber pressure,
• wherein:
• the control pressure is limitable to a predefinable pressure limit,
• the piston chamber being in flow connection with the piston chamber connection, and the annular chamber being in flow connection with the annular chamber connection, and
• the at least one controllable valve arrangement is in flow connection with the piston chamber connection via a first output line and in flow connection with the annular chamber connection via a second output line.