Patent ID: 8532903

Claim:
A control system for an internal combustion engine having fuel injection means for injecting fuel in a combustion chamber of said engine, the control system comprising: fuel injection control means for performing a main injection and a pilot injection performed before the main injection; demand output changing means for temporarily changing a demand output of said engine, wherein said demand output changing means comprises traction control means for reducing a slip of driving wheels of a vehicle driven by said engine; and output reduction means for reducing an output of said engine when the demand output is reduced by said demand output changing means, wherein said output reduction means reduces the engine output by reducing a fuel injection amount of the main injection, wherein said fuel injection control means concurrently performs a control of the pilot injection corresponding to a normal demand output state when the demand output of said engine is temporarily reduced, and controls a fuel injection amount and a fuel injection timing of the pilot injection according to the demand output of said engine, wherein the fuel injection timing of the pilot injection is defined by an interval from a fuel injection timing of the main injection, and the interval is controlled according to the demand output of said engine.