| 摘要 |
PURPOSE:To control the amount of fuel to be injected to a main intake system and an auxiliary intake system appropriately, by providing a fuel injection nozzle in each of the main intake system and the auxkliary intake system of an engine of the type in which supercharging air is supplied from an auxiliary intake passage when the engine load is high, so that fuel is supplied to these nozzles from a single fuel pump. CONSTITUTION:A main intake passage 11 and an auxiliary intake passage 12 branched from an intake passage concentrated section 13 are connected respectively to a main intake port 4 and an auxiliary intake port 6 which are opened in a combustion chamber 3, and a throttle valve 14 is provided in the main intake passage 12. On the other hand, a supercharger 15 is provided in the auxiliary intake passage 12, and a supercharging valve 16 that is opened when the engine load is higher than a predetermined level is also provided in the auxiliary intake passage 12. Here, the intake passages 11, 12 have respective fuel injection nozzles 21, 22, to which fuel is supplied from a common fuel supply pump 25 via branch passages 31, 32. Further, fuel relief passages 34, 35 are connected respectively to the nozzles 21, 22, and fuel pressure control valves 36, 37 operated in response to the intake pressure and the fuel pressure are provided respectively in the fuel relief passages 34, 35. |
