Fuel-injection device for internal combustion engines

Abstract

A fuel injection system (1) for internal combustion engines includes a plurality of injection valves (5), each provided in an injection line (4) for the fuel, where each injection valve (5) has a nozzle chamber (12) and a control chamber (15), which both communicate with the injection line (4); a valve member (7), which controls the injection openings (11) of the nozzle chamber (12) and which is actuatable via a first control face (13), located in the nozzle chamber (12) and acting in the valve opening direction, and via a second control face (14), located in the control chamber (15) and acting in the valve closing direction; a first valve (18) for controlling the pressure prevailing in the control chamber (15); and a second valve (28) for switching the injection pressure. According to the invention, for both valves (18, 28), one common valve body (30) is provided, and the stroke (H2) of the valve body (30) required to close the first valve (18) is greater than the stroke (H1) required to open the second valve (18).

Dependencies are inferred from the claim text.