| 摘要 |
PURPOSE:To adjust the air fuel ratio of a mixture on the basis of variation of an evaporating performance depending on variation of a temperature by selectively arranging an adjuster having jets of plural kinds as communicable to passages of an air bleed system and a fuel system. CONSTITUTION:At a cold weather, a passage resistance is increased by disposing a small jet 24A of an adjuster 24 in an air bleed passage 23, while other passage resistances are reduced by disposing large jets 31B, 42B and 47B of respective adjusters 31, 42 and 47 in a slow passage 29, an outflow passage 39 and a starting passage 46 acting as fuel system passages, respectively. Then, an air fuel mixture from a carbureter may be thereby enriched. At a warm weather, those jets are reversed to said cold weather arrangement in the air bleed passage 23, and the slow passage 29, the outflow passage 39 and the starting passage 46 acting as the fuel system passages, whereby the air fuel mixture from the carbureter may be leaned, and the air fuel ratio in a cylinder may be kept proper. |
