Control apparatus for cylinder injection type internal combustion engine

A control apparatus for a cylinder injection type internal combustion engine, wherein the fuel injection mode of the engine is switched between a compression stroke injection and an intake stroke injection, and wherein, when the engine is cold, the compression stroke injection is selected for the injection mode so that injected fuel collides with the top surface of a piston and is directed toward the vicinity of a spark plug, the control apparatus comprising;

• decrease correction means, wherein, when the fuel injection mode is switched from the compression stroke injection to the intake stroke injection, the decrease means decreases the fuel injection amount during the execution of the intake stroke injection from when the fuel injection mode is switched until a predetermined period elapses compared with a case when the fuel injection mode is not switched;
• and
• setting means, wherein, based on the condition of the engine during the execution of the compression stroke injection, the setting means estimates the amount of fuel adhered on the top surface of the piston at the time when the fuel injection mode is switched from the compression stroke injection to the intake stroke injection, and wherein the setting means extends the predetermined period as the estimated adhered fuel amount increases.

A control method for a cylinder injection type internal combustion engine, wherein the fuel injection mode of the engine is switched between a compression stroke injection and an intake stroke injection, and wherein, when the engine is cold, the compression stroke injection is selected so that injected fuel collides with the top surface of a piston and is directed toward the vicinity of a spark plug, the control method comprising:

• when the fuel injection mode is switched from the compression stroke injection to the intake stroke injection when the eingine is cold, delaying the ignition timing during the execution of the intake stroke injection from when the fuel injection mode is switched until a predetermined period elapses compared with a case when the fuel injection modes are not switched.