Tyre pressure regulating device

A tyre pressure regulating device for adjusting, while driving, tyre pressures of vehicle wheels of a plurality of vehicle axles of a motor vehicle with pneumatic tyres, the tyre pressure regulating device comprising:

• a switchover valve arranged on a vehicle chassis that can be controlled in an electromagnetic/pneumatic manner, wherein the switchover valve is configured to alternately connect a main connecting line that leads to an axle valve of a first vehicle axle to a pressure-carrying filling pressure line or to an unpressurized vent line;
• the axle valve, which is arranged on the vehicle chassis for the first vehicle axle and is controllable in an electromagnetic/pneumatic manner, wherein the axle valve is configured to alternately connect an axle connecting line, which branches into outer wheel connecting lines of the first vehicle axle, to the respective main connecting line or to shut off the axle connecting line with respect to the main connecting line;
• a plurality of pressure-controlled wheel valves, each pressure-controlled wheel valve being arranged at a respective vehicle wheel and being configured to alternately connect a respective inner wheel connecting line, which leads into an interior of a tyre of the respective vehicle wheel, to an associated outer wheel connecting line or to shut off the respective inner wheel connecting line with respect to the associated outer wheel connecting line;
• a pilot control valve arranged on the vehicle chassis and being controllable in a purely electromagnetic manner or in an electromagnetic/pneumatic manner, the pilot control valve being configured to alternately connect a main control line, which branches into an axle control line of the first vehicle axle, to a pressure-carrying control pressure line or to a vent outlet;
• and
• a plurality of two-channel rotary couplings arranged between the first vehicle axle and associated vehicle wheels and provided with switchable seals, wherein the two-channel rotary couplings are configured to transfer, in a pressure-tight manner, compressed air which is carried in the outer wheel connecting lines and the control pressure medium which is carried in wheel control lines, which branch off from the respective axle control line.