Fuel injection control apparatus and method for improving deviation of injector opening time

A fuel injection control apparatus comprising:

• an injector which is configured to inject fuel to a cylinder of an engine;
• and
• a controller which is electrically-connected to the injector and configured to control the injector so that the fuel is injected from the injector by a target injection fuel amount,
• wherein the controller is configured to perform a control of a pre-energizing, in which an injector coil of the injector is magnetized by applying a current to the injector during a predetermined pre-energizing time, in which flow rate of the fuel is prevented from being generated, with a predetermined idle time interposed therebetween, before a main injection in which the target injection fuel amount of the fuel is injected in the cylinder, and
• wherein the controller includes:
• a pre-energizing time and idle time calculator which is configured of determining the predetermined pre-energizing time and the predetermined idle time and
• the pre-energizing time and idle time calculator is configured to determine the predetermined pre-energizing time and the predetermined idle time according to a fuel pressure measured by a fuel rail pressure sensor and an engine temperature measured by a coolant sensor.