| 摘要 |
PURPOSE:To improve response at the time of acceleration by expediting mixture of fuel with bypassed air and pulverization by securing stability of an engine at the time of a low load and a low speed and increasing an output in a high speed range, by making the fuel collide against a tapered needle. CONSTITUTION:Fuel blown off from an injection valve 10 collides against a tapered part of a taper needle 12 interlocking unitarily with a diaphragm 11, thin filmed fuel is pulverized further by a high speed air flow flowing in from a bypass hole 17 and injected into a suction manifold 1 from a jig opening downstream a throttle valve 4. The taper needle 12 is detained downward by moving the taper needle 12 up and down according to the running state of an engine and pulling a film 13 normally by negative pressure led from a negative pressure opening 18 opening at a downstream side of a throttle valve. |
