| 摘要 |
To control the fuel injection pressure, in particular in high-pressure injection in self-igniting internal combustion engines, the pumping or supply phase of a cam-driven, intermittently operating pump piston of a fuel injection pump is determined by the closing time of a relief-metering valve and controlled in such a manner that the closing of the relief-metering valve for the supply onset (FB) is earlier, by the amount DELTA alpha , than the opening of control valves by way of which the fuel pumped by the pump piston is supplied to the individual injection locations. By means of the initial pumping amount or pre-stroke ( DELTA h or DELTA alpha ), fuel is pumped into a closed system, and the injection pressure present at the injection valve at the instant of the opening (SB) is thus controlled.
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