Fuel supply device for a diesel engine

A fuel supply device for a diesel engine operating on a light fuel and a heavy fuel delivered to its suction pipe, and also using the light fuel for cooling fuel injectors and for warming fuel injection pumps, comprising:

• a light fuel loop;
• a heavy fuel loop;
• a tank of said heavy fuel loop;
• a fuel priming pump of said heavy fuel loop;
• a system of stop valves alternately connecting said light fuel loop and said heavy fuel loop to said suction pipe, said light fuel loop being additionally communicated with said diesel engine for cooling said fuel injectors and warming said fuel injection pumps;
• a logical element "OR" of said system of stop valves having a first input, a second input and an output, the output of said logical element "OR" being connected with said suction pipe of said diesel engine;
• a pressure controller for creating a reference pressure in said system of stop valves connected to the first input of said logical element "OR";
• a flow switch valve in said system of stop valves, having its input connected to the second input of said logical element "OR" and with said fuel priming pump, the output of said flow switch valve being connected with said tank.