| 摘要 |
A drive circuit for energizing an engine fuel injector coil from a power source which has energy storage means responsive to a first control signal for selectively storing energy from the power source, and means responsive to a second control signal for selectively discharging energy stored in the energy storage means into said injector coil. The stored energy is discharged into the injector coil in addition to energy from the power source, to more rapidly open the fuel injector. In a preferred embodiment, the circuit has an inductor in circuit with the fuel injector, an inductor driver switch to control the flow of current through the inductor and an injector driver switch to control the flow of current through the fuel injector. When the inductor is energized by its associated switch, it stores significant electromagnetic energy therein, which is transferred to the injector when it is desired to open the injector to deliver an increased current to the injector to more quickly open it and reduce the start delay time for the injection event.
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