Patent ID: 7003968

Claim:
An air conditioning installation for a vehicle with an engine, the installation comprising: an electric fan assembly ( 15 ); a first measurement facility ( 24 ); a second measurement facility ( 23 ); an electronic control device ( 401 ); an injection computer ( 42 ) that transmits information items ( 33 ); and a refrigerant (m) containing closed circuit comprising: a compressor ( 14 )having an inlet and outlet; a condenser ( 11 ) having an inlet and outlet; a relief valve ( 12 ); a refrigerant that flows in the circuit having a certain mass; an associated mass flow rate when the refrigerant flows in the circuit; and an evaporator ( 13 ), wherein the first and second measurement facility measure values, relating to temperature or pressure at the inlet or outlet of the compressor or the condenser; and wherein the electronic control device ( 401 ) solves a linear equation that relates the mass flow rate of the refrigerant (m) to the values measured by the first and the second measurement facility and calculates an estimate of a quantity relating to the refrigerant, and further estimates the power absorbed by the compressor ( 14 ) based on the quantity relating to the refrigerant, of the measurements delivered by the measurement facilities and of the information items ( 33 ) transmitted by the injection computer ( 42 ).