Method and system for controlling a compressor

US6615595B2 · kind B2 · utility

Assignee

• Behr GmbH & Co. · DE

Inventors

• Wilhelm Baruschke · Schallstadt, DE
• Thomas Gerken · Stuttgart, DE
• Hans-Joachim Krauss · Stuttgart, DE
• Ottokar Kunberger · Ditzingen, DE
• Sascha Lindauer · Schorndorf, DE
• Karl Lochmahr · Leinfelden, DE
• Michael Sickelmann · Stuttgart, DE

Key dates

• Filing date: Jan 31, 2002
• Grant date: Sep 9, 2003
• Expiry date: Feb 11, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60H2001/3273
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

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.