| 摘要 |
PURPOSE:To stabilize the rotation of an engine, by operating a suction piston to keep the negative pressure of a Venturi part constant in response to the low quantity of sucked air under light load on the engine so that dropped fuel flows down in an intake manifold as the fuel is atomized. CONSTITUTION:A suction piston 3 is slidably fitted in a suction chamber 14 at one side of a Venturi part 4. When the load on an engine is light, a throttle valve 2 is hardly open and the head 18 of the suction piston 3 is located near a main nozzle 5 and fuel ejected from the nozzle collides against the head 18 so that some of the fuel flows down on the head and gathers as liquid drops. The fuel drops move to the oblique open part 30 of a pipe 29 and continuously flow in a passage 31 so that the fuel by-passes the valve 2 and flows down to an intake manifold while being atomized. For that reason, the air fuel ratio is stabilized. This results in stabilizing the rotation of the engine. |
