| 摘要 |
PROBLEM TO BE SOLVED: To provide an air-fuel mixture correcting device of a constant vacuum type carburetor, enabling a vehicle to start and travel just after starting at the low temperature and in warming-up operation, in the constant vacuum type carburetor having an automatic starter. SOLUTION: This constant vacuum type carburetor has the automatic starter S and a temperature correcting device T. The temperature correcting device T is formed by arranging a control valve element 8 for controlling opening-closing of a negative pressure control hole and an air control hole 6 by a thermosensible reactive member 87 in a control valve guide cylinder 4 opening an atmospheric hole 5, the negative pressure control hole 7 and the air control hole 6. The atmospheric hole 5 is connected to the atmosphere, and the negative pressure control hole 7 is connected to a pressure receiving chamber 60 of the constant vacuum type carburetor, and the air control hole 6 is connected to a main air passage on the upstream side of a main air jet for constituting a main fuel system. At the low temperature, the control valve element 8 cuts off the air control hole 6 and the atmospheric hole 5, and communicates the negative pressure control hole 7 with the atmospheric hole 5. The control valve element 8 communicates the air control hole 6 with the atmospheric hole 5, and also cuts off the negative pressure control hole 7 and the atmospheric hole 5 in response to a temperature rise. COPYRIGHT: (C)2007,JPO&INPIT
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