Climate control system for motor vehicle

A climate control system for a motor vehicle having a drive engine and a climate-controlled compartment, comprising:

• a hydraulic pump means operatively connected to and driven by said engine so as to deliver a working oil under pressure;
• a heat conversion means hydraulically connected to said hydraulic pump means for receiving the working oil under pressure from said hydraulic pump means and for converting a pressure energy of the received working oil into a thermal energy thereof;
• a heat radiating means operatively connected to said heat conversion means for radiating the thermal energy of the working oil to the climate-controlled compartment by means of air supplied to the climate-controlled compartment;
• an air-conditioning system including therein a refrigerant compressor means;
• a hydraulic motor means operatively connected to both said hydraulic pump means and said refrigerant compressor means of said air-conditioning system, said hydraulic motor means being supplied with the working oil under pressure by said hydraulic pump means, thereby being operated so as to drive said refrigerant compressor means;
• and
• a flow control means for controlling a direction of flow of the working oil under pressure from said hydraulic pump means toward one of said heat conversion means and said hydraulic motor means the flow control means comprising:
• a hydraulic-flow control valve hydraulically connected to said hydraulic pump means, said hydraulic-flow control valve having a first oil outlet hydraulically connected to said hydraulic motor means and a second oil outlet;
• and
• a hydraulic relief valve having an oil inlet connected to the second oil outlet of said hydraulic flow control valve, said hydraulic relief valve being operative as said heat conversion means, and hydraulically connected to a heat exchanger means comprising:
• a water jacket means arranged around said hydraulic pump, and permitting a part of the engine cooling water to be heated therein, said water jacket means being hydraulically connected to said heat radiating means, to thereby supply said heat radiating means with cooling water heated by said water jacket means.