FUEL INJECTION DEVICE AND DIESEL ENGINE HAVING THE SAME, AND FUEL INJECTION DEVICE CONTROLLING METHOD

摘要

The present invention takes as its objective to provide a fuel injection device, and a diesel engine equipped therewith, which can reduce the amount of NOx in the exhaust gas while maintaining the rate of fuel consumption satisfactory. This fuel injection device includes a pressure accumulator which accumulates fuel whose pressure has been elevated, a fuel injection valve which opens by the supply of the fuel from the pressure accumulator and injects the fuel, a supply conduit which supplies fuel from the pressure accumulator to the fuel injection valve, and two valve apparatuses which are connected in the supply conduit in parallel and each of which interrupts fuel supply to the fuel injection valve. And the fuel flow amount when one of the electromagnetic valves is open is set to be smaller than the fuel flow amount when the other electromagnetic valve is open; and, during fuel supply to the fuel injection valve, an electromagnetic valve opens first, and next an electromagnetic valve opens.