Multiple zone automatic HVAC control system and method

A method of automatically controlling a multiple zone heating, ventilation and air conditioning (HVAC) system for a vehicle, said method comprising the steps of:

• receiving a plurality of sensed inputs from sensors relating to multiple zones of an occupant compartment of the vehicle comprising a driver side zone, a passenger side zone, and a rear zone;
• receiving a plurality of manual inputs from buttons relating to the multiple zones;
• calculating a driver side blend function, rear blend function and passenger side blend function wherein the rear blend function is a calculation based on the driver side blend function and the passenger side blend function and interpolating outputs based on a blend linear interpolation for each determined blend function;
• outputting the interpolated outputs to mechanisms for the zones of the HVAC system to control temperature and flow of air from the HVAC system into the multiple zones;
• and
• controlling the temperature and flow of air into each of the multiple zones based on the received inputs and outputs to the mechanisms.