Fuel injection apparatus for internal combustion engine

摘要

The apparatus has a high pressure fuel pump (1) connected to a fuel injection valve (13) via a high pressure duct (11). Pressure relief for the duct is provided by an electric control valve (15) that has a displaceable valve element (21) formed from a ceramic material that has a valve sealing surface (35) which cooperates with a fixed valve seat (29) on a valve seat sleeve (25), which may also be ceramic, to form a sealing cross-section.