| 摘要 |
PROBLEM TO BE SOLVED: To prevent the worsening of torque fluctuation and the generation of misfire in an intake air control device of a laminated combustion internal combustion engine provided with swirl control valves. SOLUTION: Fuel injection valves 11 are arranged at the peripheral part of the inner wall surface of a cylinder head 4 in the neighborhood of the first intake valve 6a and the second intake valve 6b of an engine 1, and the fuels the fuel injection valves 11 are directly injected into cylinders 1a. Further, swirl control valves(SCV) 17 opened and closed by a step motor 19 are arranged in the respective second intake air passages 15b. The actual opening or the intensity of swirl of the SCV 17 fluctuates for every engine 1. When a maximum value of the amount of reduction of torque is larger than a misfire-judging level, an electronic control unit (ECU) 30 judges 'occurrence of misfire' to increase a target SCV opening. Then, when a mean value of the amount of reduction of torque is larger than a target value, the electronic control unit increases the intensity of swirl, and to reduce the average value of torque fluctuation. |
