| 摘要 |
The invention relates to an electrically controlled injection system for internal combustion engines, in which a magnet valve that is open when without current is used to control the fuel quantity of a high-pressure chamber in the injection pump. A pressure chamber communicates via a pressure conduit directly with the pump work chamber of the high-pressure pump, and a connection from the pressure chamber to a diversion chamber is controlled by a movable valve member via a valve seat. A diversion bore, and a pressure equalization piston is disposed on the valve member, via a neck, on a side remote from the magnet, so that approximately the same pressure as on the magnet side of the movable valve member prevails on the face end of this pressure equalization piston. The chambers on both face ends of the valve member communicate with one another through a connecting conduit, and a further connecting conduit leads from the magnet chamber to a leakage chamber. In one feature of the invention, first and second throttles are disposed upstream of the face end chamber and at the end of the connecting conduit, so that the valve member is embedded in a hydraulic column of equal pressure.
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