| 摘要 |
The invention relates to an apparatus for injecting fuel, with a fuel pump for each cylinder of the internal combustion engine, which contains a pump piston that is driven in a stroke motion. This pump piston delimits a pumping chamber, which is supplied with fuel from a fuel tank. The fuel injection apparatus also has a fuel injection valve (25) that has a pressure chamber (22) connected to the fuel pump (13) and has an injection valve element (18) that controls at least one injection opening (24). The pressure prevailing in a pressure chamber (22) can move the injection valve element (18) in an opening direction counter to a closing force in order to unblock the at least one injection opening (24) while a pressure prevailing in a control chamber (14) acts at least indirectly on the injection valve element (18) in the closing direction. The control chamber (14) can be pressure-relieved by means of a control valve (31) that can be actuated by an actuator (3). The control valve (31) has a control valve element (32) with a first valve section (33) and a second valve section (36), which are each enclosed by a respective hydraulic chamber (34, 39), of which the first hydraulic chamber (34) communicates with a high-pressure inlet (30) and the second hydraulic chamber (39) can be used to exert pressure on the control chamber (14).
|
