| 摘要 |
PURPOSE:To prevent the occurrence of such a case that fuel being lack of atomization flows into a suction hole and thereby a misfire happens, by installing a concave part in the underside of a suction pipe lying between the suction hole of an engine and a carburetor, while connecting a main well to it, and installing a check valve, which opens or closes by negative pressure, in this main well. CONSTITUTION:Usually, a check valve 8 is pressed to the lower side by a spring and opens the upper side instead. When such fuel as being lack of atomization comes to flow in from a carburetor 3, this fuel is led into a concave part 5 and collected inside a main well 6. On the other hand, when large negative pressure occurs in a suction pipe 2, the check valve 8 is pulled upward against a spring, and the upper side is closed, while the lower side is opened instead. At this time, the main well 6 is opened to the atmosphere with a pipe 13, and fuel inside the main well 6 is recovered to the inlet side of the carburetor 3 or inside an air cleaner 4. And, it is connected to a starter passage 12 and used for a part of starter fuel. With this constitution, a possibility of making the fuel flow into a suction hole 1 as being left in live gas intact is precented from occurring, thus a problem on a misfire is solved. |
