Control apparatus for internal combustion engine

A control apparatus for an internal combustion engine having first fuel injection means for injecting fuel into a cylinder and second fuel injection means for injecting the fuel into an intake manifold, comprising:

• control means for controlling said first and second fuel injection means to bear shares, respectively, of injecting the fuel at a ratio calculated as based on a condition required for said internal combustion engine, said ratio including preventing one of said fuel injection means from injecting the fuel;
• storage means for storing a reference timing of ignition;
• and
• ignition timing control means always employing at least said reference timing of ignition for controlling an ignition device,
• wherein said first and second fuel injection means bear shares, respectively, of injecting the fuel;
• wherein said storage means includes means for storing said reference timing of ignition calculated as to provide spark advance when said first fuel injection means is increased based on said ratio;
• wherein said storage means includes means for storing in a form of a map said reference timing of ignition previously calculated as based on said ratio;
• and
• wherein said storage means includes means for storing said reference timing of ignition divided into a first map applied when said first fuel injection means alone injects the fuel, a second map applied when said second fuel injection means alone injects the fuel, and a third map applied when said first and second fuel injection means inject the fuel.