Abstract: A method to adjust a first temperature of an element of a motor vehicle to be interfaced with a passenger of the motor vehicle, comprising the steps of i) adjusting a second temperature on the inside of the motor vehicle based on a second temperature currently requested to an adjustment system for said second temperature; ii) detecting a third external temperature on the outside of a passenger compartment of the motor vehicle; iii) detecting a fourth current temperature on the inside of the passenger compartment of the motor vehicle; iv) detecting a current value of the first temperature of the element; v) processing a fifth temperature based on said first, fourth and fifth temperature; and vi) exchanging a quantity of heat with the element so as to adjust the first temperature; the quantity of heat depends on the fifth temperature.

Abstract: A car air conditioning system has a pneumatic circuit to feed an air flow into a passenger compartment of a vehicle, and a cooling circuit to cool the air flow fed along the pneumatic circuit; the pneumatic circuit being provided with a three-way joint, which has an inlet connected to a first pneumatic duct, a first outlet connected to a second pneumatic duct, a second outlet communicating with the passenger compartment of the vehicle, and a shutter, which is movable from and to a closing position, wherein the inlet is separate from the two outlets.