Altitude-dependent compressor control

Abstract

A method for controlling an electrically driven compressor, which can be switched on and off as a function of demand, of a pneumatic suspension system, wherein the temperature of the compressor is calculated according to a temperature model inside a control device, and the compressor is switched on or off as a function of the calculated temperature, wherein, for the calculation of the temperature of the compressor according to the temperature model, the control device takes into account the air pressure surrounding the vehicle as an input variable, and the parameters of the temperature model are adapted as a function of this air pressure.

1 - 7 . (canceled) 
     
     
         8 . A method for controlling an electrically driven compressor, which can be switched on and off as a function of demand, of a pneumatic suspension system, wherein the temperature of the compressor is calculated according to a temperature model inside a control device, and the compressor is switched on or off as a function of the calculated temperature, wherein
 for the calculation of the temperature of the compressor according to the temperature model, the control device takes into account the air pressure surrounding the vehicle as an input variable, wherein the parameters of the temperature model are adapted as a function of this air pressure.   
     
     
         9 . The method as claimed in  claim 8 , wherein the control device takes into account the air pressure surrounding the vehicle as an input variable during filling processes of the pneumatic suspension system from the atmosphere. 
     
     
         10 . The method as claimed in  claim 8 , wherein the adaptation of the parameters of the temperature model takes place incrementally as a function of the surrounding air pressure. 
     
     
         11 . The method as claimed in  claim 8 , wherein the air pressure surrounding the vehicle is determined by the control device of an air conditioning system which is present in the vehicle and is predefined as an input variable of the control device. 
     
     
         12 . The method as claimed  claim 8 , wherein the air pressure surrounding the vehicle is determined by calculation from the absolute altitude of the vehicle above sea level, which is predefined by a position-determining system, and said air pressure is defined as an input variable of the control device. 
     
     
         13 . The method as claimed in  claim 8 , wherein the air pressure surrounding the vehicle is determined by a sensor provided in the pneumatic suspension system and is predefined as an input variable of the control device. 
     
     
         14 . A pneumatic suspension system for a motor vehicle having a control device for carrying out a method for controlling an electrically driven compressor, which can be switched on and off as a function of demand, of a pneumatic suspension system, wherein the temperature of the compressor is calculated according to a temperature model inside a control device, and the compressor is switched on or off as a function of the calculated temperature, wherein for the calculation of the temperature of the compressor according to the temperature model, the control device takes into account the air pressure surrounding the vehicle as an input variable, wherein the parameters of the temperature model are adapted as a function of this air pressure.