Fuel injection device for an internal combustion engine having a pressure-holding valve

A fuel injection device for internal combustion engines, comprising

• a fuel pump (10) for each cylinder of the engine, which fuel pump (10) has a pump piston (18) that is driven in a stroke motion by the engine and delimits a pump working chamber (22), which is supplied with fuel from a fuel tank (9)
• a fuel injection valve (12) connected to the fuel pump, the fuel injection valve having an injection valve member (28) that controls at least one injection opening (32) and can be moved by the pressure prevailing in a pressure chamber (40) connected to the pump working chamber (22) in an opening direction (29) counter to a closing force,
• a first electrically controlled control valve (60) that controls a connection (59) of the pump working chamber (22) to a discharge chamber (24),
• a second electrically controlled control valve (68, or 168, or 268) that controls the pressure prevailing in a control pressure chamber (52) of the fuel injection valve (12), which pressure acts at least indirectly on the injection valve member (28) in the closing direction, and
• a pressure-holding valve (62), which opens in the direction of the first control valve (60), situated between the pump working chamber (22) and the first control valve (60), thereby maintaining in the communication line (14) between the pressure chamber (40) of the fuel injection valve (12) and the pump work chamber (22), and in the pressure chamber (40), an elevated pressure compared to the relief chamber (24).