| 摘要 |
PURPOSE:To reduce a harmful exhaust gas component as well as to improve drivability, by installing a device, calculating a fuel injection quantity and a device, detecting phase in one operating cycle of each cylinder plus such a device that makes each fuel injection valve operates selectively, respectively. CONSTITUTION:Each throttle valve 3 is installed in a suction pipe 2 of each cylinder of a multicylinder internal-combustion engine 1, and each fuel injection valve 4 is set up at the downstream of these throttle valves 3. An injection quantity operational device 5 calculates a fuel injection quantity according to driving conditions of the engine 1. A phase detecting device 6 detects phase in one operating cycle of each cylinder. A selective injection device 7 selectively operates these fuel injection valves 4 so as to spray the calculated quantity of fuel at the detected phase. Thus, a harmful exhaust gas component is well reduced and improvements in drivability is promoted. |
