Method and system for controlling a compressor

The invention relates to a method and system for controlling a compressor in a refrigerant circuit of an air-conditioning system of a motor vehicle. The instantaneous load torque is determined and compared with a maximum limiting torque prescribed by an engine controller, and the compressor is contr...

Full description

Saved in:
Bibliographic Details
Main Authors Baruschke, Wilhelm, Gerken, Thomas, Krauss, Hans-Joachim, Kunberger, Ottokar, Lindauer, Sascha, Lochmahr, Karl, Sickelmann, Michael
Format Patent
LanguageEnglish
Published 01.08.2002
Online AccessGet full text

Cover

More Information
Summary:The invention relates to a method and system for controlling a compressor in a refrigerant circuit of an air-conditioning system of a motor vehicle. The instantaneous load torque is determined and compared with a maximum limiting torque prescribed by an engine controller, and the compressor is controlled depending on the comparison value resulting therefrom. In order to avoid complete shutdown of the compressor, the instantaneous load torque is represented as a function of variables, such as compressor speed and high pressure of the refrigerant, and, using an inverted function belonging to this function, a control signal for the compressor, for example, a set-point value for the high pressure of the refrigerant, is determined as a function of the maximum limiting torque and employed to control the compressor.