Air suspension device for vehicles, having individual control and only one pressure sensor

Abstract

An air suspension device for vehicles, in particular for commercial vehicles, including a valve block for aerating a plurality of air-spring bellows with compressed air from a compressed-air supply or for venting the air-spring bellows through an air vent, the valve block including at least one air-bellows valve assigned to an air-spring bellows or a group of air-spring bellows of the plurality of air-spring bellows, for individually aerating and venting this air-spring bellows or group of air-spring bellows. The present system provides for the valve block to additionally include a valve device, by which the at least one air-bellows valve may be simultaneously decoupled from the compressed-air supply and the air vent, and for a pressure sensor for measuring the air pressure in the flow path between the valve device and the at least one air-bellows valve to be provided on the other side of the corresponding air-spring bellows.

1 . An air suspension device for a vehicle, comprising: 
 a valve block for aerating a plurality of air-spring bellows with compressed air from a compressed-air supply or for venting the air-spring bellows through an air vent; and    at least one air-bellows valve assigned to at least one of the plurality of air-spring bellows, for individually aerating and venting the at least one air-spring bellows, wherein the valve block includes the at least one air-bellows, and wherein the valve block includes a valve device by which the at least one air-bellows valve may be simultaneously decoupled from the compressed-air supply and from the air vent, and a pressure sensor for measuring air pressure in a flow path between the valve device and the at least one air-bellows valve is provided on an other side of a corresponding air-spring bellows.    
   
   
       2 . The air-suspension device of  claim 1 , wherein the valve block containing the valve device, and the pressure sensor, are assigned to an axle of the vehicle.  
   
   
       3 . The air-suspension device of  claim 2 , wherein ones of the air-spring bellows are assigned to at least one additional axle, and may be aerated or vented by the valve block assigned to the one axle.  
   
   
       4 . The air-suspension device of  claim 3 , wherein the pressure sensor is connectable to the at least one air-spring bellows of each axle in a pressure-conducting manner by switching through the air-bellows valves assigned to the at least one air-spring bellows.  
   
   
       5 . The air-suspension device of  claim 4 , wherein the valve block of a rear axle of the axles includes a 3/2-way directional control valve, which connects the air vent or the compressed-air supply to a connection of the valve device.  
   
   
       6 . The air-suspension device of  claim 5 , wherein the valve device includes a 2/2-way directional control valve, which switches the connection through to the air-bellows valves or blocks it.  
   
   
       7 . The air-suspension device of  claim 4 , wherein the valve device includes a 2/2-way directional control valve, which connects the air vent through to the air-bellows valves or blocks this flow path.  
   
   
       8 . The air-suspension device of  claim 7 , wherein the valve device includes a further 2/2-way directional control valve, which connects the compressed-air supply through to the air-bellows valves or blocks this flow path.  
   
   
       9 . The air-suspension device of  claim 3 , wherein, on at least of a rear axle and a lifting axle of the axles, the air-spring bellows of each vehicle side is assigned a 2/2-way directional control valve in the form of an air-bellows valve.  
   
   
       10 . The air-suspension device of  claim 1 , wherein at least one of the valves includes a solenoid valve having a pneumatic pilot-operation connection for a pneumatic-electric pilot control and operation.  
   
   
       11 . The air-suspension device of  claim 10 , wherein at least the valve block assigned to a rear axle, the pressure sensor, and an electronic control unit for the pneumatic-electric pilot control, are integrated in one unit.  
   
   
       12 . The air-suspension device of  claim 3 , wherein a valve block assigned to a front axle of the axles includes a 3/2-way directional control valve, by which the air-spring bellows of the front axle are interconnected via a throttle device or connected to the air-bellows valves of the at least one additional axle.  
   
   
       13 . The air-suspension device of  claim 1 , wherein the axle is a rear axle.  
   
   
       14 . The air-suspension device of  claim 1 , wherein the vehicle is a commercial vehicle.  
   
   
       15 . The air-suspension device of  claim 2 , wherein ones of the air-spring bellows are assigned to a front axle and a lifting axle.