Internal combustion engine with reduced pressure common rail direct injection fuel supply system and operating method thereof

The present invention relates to an internal combustion engine with reduced pressure common rail fuel supply system, having, inter alia, at least one cylinder (1 ), a piston (3) therein capable of making alternating movement, a combustion chamber (4) formed above the piston and a cylinder head (2). The engine includes at least one injector (15) having a nozzle body (16), and within it a nozzle needle (20) adapted to move axially, further having a nozzle base (17), a heat exchanging section (23), a nozzle head (19) a fuel connector (14), an electrical connector (13). It requires decreased injection pressure by injecting a fuel of less viscosity, which is heated by the heat of the combustion chamber (4). It is characterized by that the injector (15) is connected to the cylinder head (2) by the nozzle base (17), the heat exchanging section (23) is separated from the cylinder head (2) by an air gap (25), and the nozzle head (19) is arranged extending into the combustion chamber (4), and the deposit development is prevented by moving the heating surfaces with respect to each other.