Fuel injection system for IC engine

摘要

The fuel injection system has a pressure store kept full by a fuel pump. The system has an electromagnetic injection valve (1) for each combustion chamber, and a valve needle (2) with injection apertures (4), loaded by a spring (6). The fuel pressure is controlled by a magnetic valve (3) via an annular cavity (9) and a channel (5) connected to it. The system includes a valve member (8) of the magnetic valve, a sector (24) of which acts with a valve seat (17) to open and close a first valve aperture (14) upstream of the annular cavity, and a sector (23) working with a second valve seat (10) to open and close a second valve aperture (15) downstream of the annular cavity, connected to a leakage line (11).