| 摘要 |
An electromagnetic fuel injector with a differential pressure actuated injector valve therein to control fuel injection is supplied with fuel at a predetermined supply pressure, the injector having incorporated therein a hydraulic fluid (fuel) powered booster pump means operable to increase the pressure of fuel from the original supply pressure to a higher injection pressure for effecting operation of the injector valve, the flow of hydraulic fluid (fuel) to effect operation of the booster pump means being controlled by a solenoid actuated valve means controlling inlet and discharge of fuel to a fluid control chamber in communication with the power piston of the booster pump through a control or metering orifice of predetermined size, whereby the rate of pressure intensification of fuel to the injector valve is controlled. |
