| 摘要 |
Fuel injectors are disclosed for use in internal combustion engines including a housing which includes a working chamber, a piston, including a plunger, for reciprocal movement within the working chamber, a hydraulic valve having one side facing the control chamber and the other side facing a poppet chamber, and including a poppet defining the poppet chamber in communication with an inlet port and the working chamber, the poppet providing a throttling slot between the working chamber and the poppet chamber, a spring urging the hydraulic valve towards the closed position, a control valve between the control chamber and the spill port, and a bypass channel between the poppet chamber and the control chamber, whereby during initial movement of the hydraulic valve from its closed position to its open position the primary bypass channel is closed and when the hydraulic valve reaches an intermediate position the primary bypass channel is open.
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