| 摘要 |
PROBLEM TO BE SOLVED: To stabilize the state of an engine without damaging the operation of a brake booster in a laminated combustion internal combustion engine provided with the brake booster for ensuring the driving force on the basis of negative pressure. SOLUTION: Fuel injection valves 11 are arranged in the peripheral part of the inner wall face 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 from the fuel injection valves 11 are injected directly into cylinders 1a. Further, a brake booster 71 for ensuring the driving force of a vehicle is provided at an air intake duct 20 in the downstream of an electronic control type throttle valve 23. An electronic control device (ECU) 30 throttles the opening of the throttle valve 23 by the amount being closed when it is judged that there is a need for ensuring negative pressure for operating the brake booster 71. Furthermore, when the above control is performed, a final target injection quantity is obtained by adding the injection quantity equivalent to the increased fuel quantity to the basic injection quantity. |
