| 摘要 |
The invention relates to a fuel injection device comprising: a fuel injector; a tube which is used to supply fuel to the injector; a needle which moves and thereby opens or closes the injector; and a valve which controls a fuel leak in order to cause the needle control pressure to drop below a switching pressure threshold, said tube being supplied with fuel at a source pressure (Ps). The invention comprises the following two steps, namely: the valve is opened, outside of the injection phases, for short periods at an excitation frequency in order to create an oscillatory phenomenon in relation to the pressure in the tube around the source pressure (Ps), the opening duration being shorter than a predetermined period which is necessary for the control pressure to reach the switching pressure; and the fuel injection is started at a moment when the pressure in the tube is increasing and greater than the source pressure (Ps). |
