A fuel injection control device

A fuel injection control device is disclosed. The fuel injection control device comprises a pressurized fuel chamber and a fuel injector connected with the pressurized fuel chamber via a pipe. When the fuel injector carries out a pilot fuel injection and a main fuel injection, a part of the fuel is consumed from the fuel injector without the fuel injection to produce a negative pressure wave in the fuel injector such that a positive pressure wave reaches the fuel injector in the pilot fuel injection or a negative pressure wave reaches the fuel injector in the main fuel injection.