Patent ID: 6688289
Filing Date: 2004-02-10
Classification: F02M

Abstract:
In a fuel injection system for internal combustion engines, having one fuel pump (10) for each cylinder of the engine, which pump has a pump piston (18), driven by the engine in a reciprocating motion, that defines a pump work chamber (22), which communicates via a line (14) with a fuel injection valve (12), disposed on the engine separately from the fuel pump (10), which valve has an injection valve member (28), by which at least one injection opening (32) is controlled, and which is movable in the opening direction (29), counter to a closing force, by the pressure generated in the pump work chamber (22), wherein at least one first electrically controlled control valve (60; 160; 260; 360; 460) is provided, by which at least indirectly a communication of the pump work chamber (22) with a relief chamber (24) is controlled, and wherein a second electrically triggered control valve (70; 170; 270; 370; 470) is provided, by which the pressure prevailing in a control pressure chamber (52) of the fuel injection valve (12) is controlled, by which pressure the injection valve member (28) is urged at least indirectly in the closing direction, the improvement wherein both control valves (60; 160; 260; 360; 460 and 70; 170; 270; 370; 470) are disposed on the fuel injection valve (12).