| 摘要 |
For each cylinder of the internal combustion engine, the fuel injection apparatus has a high-pressure fuel pump and a fuel injection valve connected to it. A pump piston of the high-pressure fuel pump defines a pump working chamber connected to a pressure chamber of the fuel injection valve, which has an injection valve member which controls the injection openings and which the pressure prevailing in the pressure chamber can move in an opening direction counter to a closing force. A first control valve controls a connection between the pump working chamber and a relief chamber, and a second control valve controls a connection between the relief chamber and a control pressure chamber, which is connected to the pump working chamber. A control piston, which acts on the injection valve member, has a surface area that is acted on by the pressure prevailing in the control pressure chamber and that is determined in such a way that with a closed second control valve, the force acting on the control piston when the fuel injection valve is open with a partial stroke of the injection valve member is sufficient to close the fuel injection valve, and with a maximal stroke of the injection valve member, this force is not sufficient to close the fuel injection valve.
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