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Altitude-dependent compressor control

Inactive Publication Date: 2013-04-25
CONTINENTAL TEVES AG & CO OHG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a method for controlling a compressor in a pneumatic suspension system of a vehicle. The compressor can be turned on and off based on demand, and it is well protected against damage from heat generation even at different geodetic altitudes. The compressor also has enough running time to reliably perform filling and refueling processes.

Problems solved by technology

This can lead to overheating and to destruction of the compressor.

Method used

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Embodiment Construction

[0012]In this context, the control device which is necessary for the method is configured in its algorithms in such a way that, 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 (i.e. the ambient pressure) as an input variable, wherein the parameters of the temperature model are adapted as a function of this air pressure. Even if delivery capacity drops markedly at high altitudes, i.e. far above sea level, compared to the delivery capacity at sea level due to the reduced air pressure, the formation of the method according to the invention can at least partially correct this effect through an increased compressor running time. Through the counterpressure / filling pressure in the compressor cylinder which is correspondingly lower at high altitudes, the compressor in fact becomes less warm. At high altitudes, the low ambient pressure (admission pressure) of the compr...

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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.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the U.S. National Phase Application of PCT / EP2011 / 057011, filed May 3, 2011, which claims priority to German Patent Application No. 10 2010 017 654.0, filed Jun. 30, 2010, the contents of such applications being incorporated by reference herein.FIELD OF THE INVENTION[0002]The invention relates to 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 in the method the temperature of the compressor or the temperature of the air compressed in the compressor is calculated according to a temperature model inside a control device, which temperature model takes into account, as input variables, inter alia the electrical voltage of the compressor, the surrounding temperature and the pressure ratios in the pneumatic suspension system, after which the compressor is switched on or off as a function of the calculated temperatu...

Claims

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Application Information

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IPC IPC(8): F04B49/06
CPCB60G17/0408B60G2400/50B60G2400/70F04B49/06B60G2500/2012B60G2500/205B60G2401/16
Inventor ENGELHARDT, MAREK
Owner CONTINENTAL TEVES AG & CO OHG
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