Patent ID: 6862893

Claim:
A method of operation of a climate control system for a vehicle cabin bounded in part by a windglass, where the climate control system generates control signals for controlling climate control elements to condition air in the cabin, the method of operation comprising the steps of: computing a vapor flow indicator representative of a moisture mass flow rate between the windglass and the cabin air based on measured cabin parameters; and setting lower and upper threshold values of said vapor flow indicator to define a first range of said vapor flow indicator below said lower threshold value for which the control signals generated by said climate control system are not modified, a second range of said vapor flow indicator above said upper threshold value for which the control signals generated by said climate control system are modified to fully increase a defogging effect of said control elements, and a third range of said vapor flow indicator between said lower and upper threshold values for which the control signals generated by said climate control system are modified to partially increase a defogging effect of said control elements.