Pneumatic suspension system of a motor vehicle and method

摘要

A suspension system includes spring bellows that are associated with pneumatic springs of vehicle axles, are connectable by lines having level control valves to a main pressure line, and can be shut off with respect thereto. The main line is connectable by valves alternately to a compressed air source and a sink, and can be shut of with respect thereto. To set different air mass flow rates when air is supplied to/removed from the bellows, the bellows of the springs at least on a vehicle axle or side can be connected to the main line in parallel with the connecting lines, at least by further connecting lines having further level control valves, and can be shut off with respect thereto. The further valves have nozzle cross-sectional surfaces the same size as the other level control valves. Chokes are downstream of the further valves in the ventilation direction, the cross-sectional surfaces thereof being smaller than the nozzle cross-sectional surfaces of the further valves.

主权项

1. A vehicle pneumatic suspension system, comprising spring bellows associated with pneumatic springs of at least one axle of a vehicle, the spring bellows being one of connected to and shut off from a main pressure line via first connection lines having first level control valves, the main pressure line being connectable alternately to a compressed air source and a compressed air sink by at least one valve, the spring bellows of ones of the pneumatic springs arranged at least on one of one axle of the vehicle and one side of the vehicle being connectable to the main pressure line in parallel with the first connection lines at least by second connection lines having second level control valves, the second level control valves of the spring bellows having nozzle cross-sectional areas of the same size as nozzle cross-sectional areas of the first level control valves; and restrictors arranged after the second level control valves in an air admission direction, the cross-sectional areas of the restrictors being smaller than the nozzle cross-sectional areas of the second level control valves.