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Method and system for controlling a compressor

  • US 6,615,595 B2
  • Filed: 01/31/2002
  • Issued: 09/09/2003
  • Est. Priority Date: 01/31/2001
  • Status: Expired due to Fees
First Claim
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1. A method for controlling a compressor in a refrigerant circuit of an air-conditioning system in a motor vehicle driven by an engine, comprising:

  • determining an instantaneous load torque (M) of the compressor as a function (f) of at least one variable;

    determining a predetermined maximum limiting torque (Mlimit) as a function (f) of at least one variable and based on parameters set by a controller of the engine;

    comparing M with Mlimit, and if M>

    Mlimit;

    using an inverted function (finv) which is derived from function (f) to generate a control signal for the compressor based on Mlimit; and

    controlling the compressor based at least in part on the generated control signal.

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