| 摘要 |
PURPOSE:To improve fuel consumption of a gasoline engine, by setting a device for adjusting the control timing of a rotary valve in a suction pipe in accordance with the engine load. CONSTITUTION:A pipe 10 connecting a section port 5 with a carburetor 9 is equipped with a rotary valve 11 to open or close the pipe 10. A rotary shaft 12 connected with the rotary valve 11 is held by bearings 16-18, and another rotary shat 20 is driven by a timing gear 22 through an adjusting top 21 at a revolution half that of a crankshaft. A lever 26 for shifting the top 21 is connected with an accelerating pedal. As the adjusting top 21 is shifted in accordance with the engine load, helical splines made on the shafts 12, 20 alter the control timing of the rotary valve 11. This can maintain a preset excess air ratio at the maximum output and provide a high thermal efficiency. |
