Patent ID: 6976474

Claim:
A fuel injector comprising: an injector body having disposed therein a low pressure drain, a fuel pressurization chamber and a needle control chamber; a fuel pressurizer at least partially positioned in said injector body, and including a tappet and an electronically controlled spill valve, which includes a first electrical actuator; a needle valve that includes a member with a closing hydraulic surface exposed to fluid pressure in said needle control chamber; an electronically controlled needle control valve that includes a biaser and a second electrical actuator operably coupled to a control valve member that is biased toward a first position by said biaser, but movable to a second position when said second electrical actuator is energized; said needle control chamber being fluidly blocked from said fuel pressurization chamber when said control valve member is in said first position, but fluidly connected to said fuel pressurization chamber when said control valve member is in said second position; and said needle control chamber is fluidly connected to said low pressure drain when said control valve member is in either of said first and second positions.