Patent ID: 7387105

Claim:
An injector for a diesel engine, comprising: a nozzle body having a guide portion therein and first and second injection holes for injecting a fuel into a combustion chamber, the first and second injection holes being formed on a lower portion of the guide portion; first and second needles for selectively opening and closing the first and second injection holes by moving upwardly and downwardly along the guide portion; an ECU for controlling an ignition timing and opening and closing timings of the first and second injection holes; a needle actuator for selectively controlling upward and downward movements of the first and second needles according to an electrical signal from the ECU; a needle spring disposed between the needle actuator and the first and second needles and applying a restoring force to the first and second needles; and first and second blocking units mounted on an upper portion of the guide portion, the first and second blocking units selectively blocking the upward movements of the first and second needles according to the electrical signal of the ECU, wherein one needle of the first and second needles has a blade, and the other needle defines a groove wherein the blade is received.