| 摘要 |
PURPOSE:To obtain high accuracy and increase reliability with a simple structure by providing a check valve for opening/closing an injection valve based on a first negative pressure generated in the intake stroke of an engine or a second negative pressure generated in another stroke. CONSTITUTION:Fuel which is correctly measured by a slow-system and a main- system fuel control portion 1, 2 in accordance with an air flow rate is fed into each injector 3-6 via a fuel passage 20 as a continuous flow. In this case, when the crank angle of an engine is at 0-180 deg., since only a cylinder #1 is in an intake stroke with the other cylinders #2-#4 being out of the intake stroke, only the injector 3 opens a ball valve 22 against the elasticity of a spring 23 to inject the whole quantity of the fed fuel into the air feeding manifold of the cylinder #1. As the crank angle exceeds 180 deg., the intake stroke of the cylinder #1 is finished closing the injector 3. Thus, the fed fuel is sucked by itself in accordance with the intake stroke of each cylinder #1-#4 in order, to accurately carry out the distribution of fuel. |
