Method for operating a compressed air system

A vehicle air suspension system comprising:

• a control device including a processor and having a program code for carrying out a switching program stored therein;
• a compressed-air system having a plurality of pneumatically operated actuators, a plurality of switchable pneumatic valves, a plurality of compressed-air supply devices and a plurality of compressed-air treatment devices, which are interconnected via a pneumatic line system,
• an air spring bellows and a switchable bellows valve interconnected in a first bellows-related line system;
• said plurality of compressed-air supply devices and said plurality of compressed-air treatment devices being provided in a second accumulator-related line system;
• said first bellows-related line system and said second accumulator-related line system being interconnectable via at least one of the plurality of switchable pneumatic valves configured as a separation valve;
• a pressure sensor being arranged in said first bellows-related line system for measuring a pressure in said first bellows-related line system;
• said plurality of compressed-air supply devices including at least one compressed-air source and a compressed-air accumulator;
• said control device being configured for open-loop and closed-loop control of said compressed-air system, and said plurality of switchable pneumatic valves, said plurality of compressed-air supply devices and said plurality of compressed-air treatment devices being actuated in accordance with said algorithm;
• said program code being configured, when executed by said processor, to actuate, via said algorithm for said switching program, a subset of the plurality of switchable pneumatic valves in order to connect said compressed-air accumulator to said pneumatic line system only after a pressure equalization between the pressure in said compressed-air accumulator and the pressure in said pneumatic line system, wherein said algorithm for said switching program is programmed such that said plurality of switchable pneumatic valves are actuated in dependence upon a difference between a first pressure in said compressed-air accumulator and a second pressure in said pneumatic line system, wherein the pressure equalization is initiated by said control device by actuation of the plurality of switchable pneumatic valves;
• and,
• wherein, for the pressure equalization, compressed air is introduced from at least one of said at least one compressed-air source and said plurality of pneumatically operated actuators into said pneumatic line system.