| 摘要 |
PURPOSE:To obtain starting at a low number of revolutions by operating an air- amount regulation mechanism of a carburetter in accordance with temperature signals of a thermometer. CONSTITUTION:A main air-jet regulation screw 17 is provided with a piston 17a to be easily slided, and changes the passage area of a main air-jet 5. The temperature of a thermometer 13 transmitted by a temperature transmission route 14 is changed into pressures of two stages by a transducer 15. The pressure generated in the transducer 15 is conducted through a pressure transmission route 16 to slide a main air-jet regulation screw 17. During steady operation, the main air-jet 5 introduces air into a main fuel passage 3, and weakens the negative pressure working to a main fuel jet 2 for preventing the air-fuel mixture from being thick as the amount of the air is increased. Howerver, for starting, it works to make the air-fuel mixture thick. When the temperature of the thermometer 13 is under t1, the main air-jet regulation screw 17 is drawn back from the main air-jet 5. As the bleed air can easily enter a fuel reservior 6, the air-fuel ratio is increased. |
