| 摘要 |
PURPOSE:To prevent mixture from becoming rich or lean, and to achieve stable combustion by detecting the change of dynamic pressure in branched intake passages which respectively correspond to intake valves having been provided in the plural number for one cylinder, and making the injection direction of fuel from an injector being situated inside a common intake passage variable in response to the detected result. CONSTITUTION:In an engine in which two intake valves 2, 3 are provided for each cylinder, dynamic-pressure detecting means 6, 7 are respectively provided to branched intake passages 4, 5 for respective intake valves 2, 3, and further in the intake passage 8 for both branched intake passages 4, 5, an injector 9 is installed so as to be positioned in the center of the diverging point. Further, assist-air passages 12, 13 are openedly communicated with an intake passage 11 in the position directly on the upstream side of a throttle valve 10 which is provided on the upstream side of the intake passage 8, and also respective passages 12, 13 are communicated with respective dynamic-pressure detecting means 6, 7. And assist-air passages 14, 15 having injection ports 14a, 15a which are opened to the right and left sides of the injector 9 are extended from respective dynamicpressure detecting means 6, 7 along the injector 9 in a crossed state. |
