×

FUZZY LOGIC CONTROL OF A VARIABLE DISPLACEMENT COMPRESSOR IN A VEHICLE AIR CONDITIONING SYSTEM

  • US 20040019409A1
  • Filed: 07/26/2002
  • Published: 01/29/2004
  • Est. Priority Date: 07/26/2002
  • Status: Active Grant
First Claim
Patent Images

1. A method of controlling an electrically activated displacement control valve of a variable displacement refrigerant compressor in an air conditioning system for regulating a system parameter to a desired value, the method comprising the steps of:

  • measuring the regulated system parameter, and determining an error of the measured parameter with respect to the desired value;

    measuring a pressure of refrigerant in the system, and detecting a rate of change of such measured pressure;

    determining an activation adjustment for the control valve by applying fuzzy logic membership functions and predetermined fuzzy logic rules to the determined error and the detected rate of change in the measured pressure; and

    adjusting an activation of said control valve based on the determined activation adjustment.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×