| 摘要 |
A fuel injection device for internal combustion engines, including a fuel injector that can be supplied by a high-pressure fuel source, and a pressure intensifying device that has a movable piston is connected between the fuel injector and the high-pressure fuel source. The movable piston separates a chamber connected to the high-pressure fuel source from a high-pressure chamber connected to the injector whereby the fuel pressure in the high-pressure chamber can be varied by filling a return chamber of the pressure intensifying device with fuel or by emptying fuel from the return chamber. A valve is provided with a valve body, which can be moved as a function of the fuel pressure prevailing in the return chamber so that the valve can connect the high-pressure chamber to the chamber. The invention also proposes a pressure intensifying device that is suitable for this purpose.
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