Fuel injection apparatus for engine and method of operating the engine equipped with the apparatus

摘要

A fuel injection apparatus with which energy for driving the high pressure fuel pumps (20) of the apparatus by proper operation of the high pressure fuel pumps in order to reduce waste energy, and a method of operating an engine equipped with the apparatus, are provided. The apparatus is provided with a controller (100) which allows some of the plurality of high pressure fuel pumps to be made inoperative in discharging fuel to the common rail (7) by controlling the electromagnetic valves (1) of said some of the pumps so that the plunger rooms (3) of said some of the pumps are communicated to a fuel feed line for feeding fuel to the plurality of the pumps when the engine is operated with small/medium fuel injection quantity of smaller than a certain quantity.