Fuel injection system for supplying fuel to diesel engine of motor vehicle, has high-pressure pump connected with injector, and pressure intensifier return line including coupling line that connects injector return line with supplying path

摘要

The system (1) has an injector (4), and a high-pressure pump (8) connected with the injector by a high-pressure path (9). A low-pressure pump (5) is connected with a suction side of the high-pressure pump by a supplying path (7). A pressure intensifier (11) is arranged in the high-pressure path, and a pressure intensifier return line (12) guides fuel from the pressure intensifier to a suction side of the low-pressure pump. A coupling line (19) connects an injector return line (16) with the supplying path, and a throttle is arranged in the coupling line.