| 摘要 |
PURPOSE:To promote atomization of fuel for stabilizing revolution of an engine in idling by permitting the upstream end of a throttle valve bypassing path of the engine provided upstream of a throttle valve with a fuel injection nozzle to open downstream of the fuel injection nozzle. CONSTITUTION:A fuel injection nozzle 8 is provided upstream of a throttle valve 4 provided in an intake path 3 of an engine 1, and the upstream end of a bypass path 5 for bypassing the throttle valve 4 is opened downstream of the fuel injection nozzle 8. A computer controlling unit 12 receiving detected values of an air amount sensor 9, engine speed sensor 13, etc. controls the opening time of the fuel injection nozzle 8 while controlling negative pressure to a diaphragm unit 7 provided in the bypass path 5 for controlling the sectional area of flow therein in response to the engine speed of the engine in idling by opening and closing a solenoid valve 11. |
