Screw Compressor System for a Utility Vehicle

Abstract

A screw compressor system for a utility vehicle has at least one screw compressor, at least one screw compressor drive and at least one control and/or regulation unit. The control and/or regulation unit is connected to the screw compressor drive and is designed and configured such that it monitors, when the screw compressor is in operation, the ratio of idle time and switched on time of the screw compressor drive and this ratio controls and regulates to a predetermined range.

1 - 8 . (canceled) 
     
     
         9 . A screw compressor system for a utility vehicle, comprising:
 at least one screw compressor;   at least one screw compressor drive; and   at least one open-loop and/or closed-loop control unit, wherein the open-loop and/or closed-loop control unit is connected to the screw compressor drive,   the open-loop and/or closed-loop control unit is configured such that, during operation of the screw compressor, said open-loop and/or closed-loop control unit monitors a ratio of idle time and activated time of the screw compressor drive and adjusts said ratio to a predefined range by open-loop and/or closed-loop control.   
     
     
         10 . The screw compressor system as claimed in  claim 9 , wherein
 the open-loop and/or closed-loop control unit is a constituent part of the screw compressor system.   
     
     
         11 . The screw compressor system as claimed in  claim 9 , wherein
 the open-loop and/or closed-loop control unit is a constituent part of an air treatment system of the utility vehicle.   
     
     
         12 . The screw compressor system as claimed in  claim 9 , wherein
 the open-loop and/or closed-loop control unit is a constituent part of an engine or vehicle controller of the utility vehicle.   
     
     
         13 . The screw compressor system as claimed in  claim 9 , wherein
 the open-loop and/or closed-loop control unit is a separate open-loop and/or closed-loop control unit.   
     
     
         14 . The screw compressor system as claimed in  claim 9 , wherein
 the predefined range is selected such that a ratio of idle time to activated time is present in which the activated time amounts to approximately 20-40%.   
     
     
         15 . The screw compressor system as claimed in  claim 9 , wherein
 the predefined range is selected such that a ratio of idle time to activated time is present in which the activated time amounts to approximately more than 30%.   
     
     
         16 . The screw compressor system as claimed in  claim 9 , wherein
 the open-loop and/or closed-control loop unit is configured so as to influence the rotational speed of the screw compressor drive such that the ratio of idle time and activated time of the screw compressor drive is kept in the predefined range.   
     
     
         17 . The screw compressor system as claimed in  claim 16 , wherein
 the open-loop and/or closed-loop control unit is configured so as to keep the rotational speed of the screw compressor drive above a minimum rotational speed at all times.