Fuel injection control system for engine

A fuel injection control system for an engine comprising:

• fuel injection valves, each of which injects fuel into one cylinder of said engine a plurality of times during each cycle;
• sensors for detecting driving conditions and generating output signals representing said driving conditions;
• and
• control means for (1) calculating a required fuel injection amount, based on said driving conditions, and a trailing side injection capability of a trailing side injection time point, (2) comparing the required fuel injection amount with the trailing side injection capability and determining which is greater, (3) setting a leading side injection time point, a trailing side injection time point, a leading side injection amount and a trailing side injection amount, (4) controlling said fuel injection valves so as to carry out fuel injection only at the trailing side injection time point when the required fuel injection amount is not greater than the trailing side injection capability and so as to divide the fuel injection between a fuel injection at the leading side injection time point and a fuel injection at the trailing side injection time point when the required fuel injection amount is greater than the trailing side injection capability.