Heat exchanger for the feeding of fuel in internal combustion engines

A heat exchanger for the feeding of fuel in internal combustion engines provided with a cooling water circuit, having an inlet, connected to an outlet of a water radiator, and an outlet;

• and with a lubricant oil circuit having an inlet and an outlet,
• wherein the heat exchanger (HE) comprises:
• a first and a second stage (E1, E2), each having an inlet and an outlet of water, the second stage (E2) having an inlet and an outlet of oil, the first stage (E1) being provided with fuel inlet and outlet nozzles, selectively connected, in parallel, to the fuel supply to the engine (M);
• the inlet and outlet of water of the first stage (E1) being respectively connected to the outlet of the water radiator, by means of the cooling water circuit, and to the water inlet of the second stage (E2);
• the water outlet of the second stage (E2) being connected to the inlet of the water radiator, and the inlet and outlet of oil in the second stage (E2) being connected in series to the lubricant oil circuit.