The invention relates to an internal combustion engine with direct injection and supercharging in which the ignitability deteriorates because the density of the fuel at the spray center becomes excessive due to the shrinkage of the fuel spray under the supercharging. As a result, the density of the smoke and the hydrocarbon exhaust rate increase.
The mixture of the fuel and the air under the supercharging is promoted by the control of a TCV installed in the suction port which is a divided spray and air flow generation mechanism and by the valve timing control of the suction and exhaust valve, etc.