| 摘要 |
PURPOSE:To obtain accurate air fuel ratio, by adjusting the area of a fuel passage or air passage and correcting uneven work finish of a fuel orifice, air orifice, etc. CONSTITUTION:The opening area of an air orifice 44 is controlled by a pneumatic valve 46 operated by an actuator 48 so as to fix an output of a hot wire sensor 20 provided to a bypass air passage 18, simultaneously the opening area of a fuel orifice 40 is controlled by a fuel valve 42 operated by the actuator 48 to almost fixedly maintain air fuel ratio. Unevenness of the air fuel ratio caused by uneven work finish of the orifices 40, 44, valves 42 and 46 or the like is corrected by adjusting the passage area through an adjusting means 103 provided to a fuel passage 32 or air passage. An adjusting means responsively operated to temperature or other factors is provided and may be constituted to correct the air fuel ratio responsively to these factors. |
