Electrocontrolled diesel oil injector

The utility model relates to a novel electrically controlled diesel oil injection device, particularly a structure design of an electrically controlled fuel oil injection device which mainly comprises an oil injection pump, an electromagnetically controlled by-pass valve, a high-pressure oil tube, an oil injector, a low-pressure system, an electronic control unit and an oil outlet valve arranged on the high-pressure oil tube between the electromagnetically controlled by-pass valve and the oil injector. The utility model can decouple the pressure fluctuation of an oil nozzle end and the pressure fluctuation of the low-pressure system by the oil outlet valve so that the oil nozzle end has stable backpressure when an injection system starts working and the fuel oil pressure in the high-pressure oil tube is quickly reduced after an electromagnetic valve of the injection system is opened so as to eliminate secondary injection and irregular injection and avoid cavitation caused in the way that bubbles occur in the high-pressure oil tube and an oil nozzle; thus an engine can work more smoothly so as to improve the power performance, the economic performance and the emission performance of the engine.