| 摘要 |
A fuel injection system for internal combustion engines which has a metering valve disposed in a fuel supply line, in which adjusting characteristics for controlling the metering valve are strictly linear, thereby enabling a predictable, flexible fuel metering using simple and inexpensive control circuits. To this end, metering slits in the metering valve, which cooperate with a control piston in a known manner, are each connected to a respective differential pressure valve, which is adjusted such that the pressure differential (p1,2) before and after the metering slits is constant, regardless of the size of the uncovered cross section of the metering slits. Thus the cross section of the metering slits uncovered at a given time is linearly dependent solely on the displacement travel (h) of the control piston, which in turn is proportional to a control pressure (p4) exerted upon the control piston and generated by a pressure adjuster which operates in accordance with the operating characteristics of the engine.
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