| 摘要 |
PURPOSE:To decrease the total height of a carburetor, by heightening the mixture concentration of the carburetor in the starting and cold running of an engine without using a choke valve. CONSTITUTION:Sucked air sent from a pump 22 has its pressure regulated to a prescribed level by a constant pressure valve 23 and then jets out at a high speed through an orifice 30 and an ejecting section 31 so that intense negative pressure is caused at a pressure drop section 32. Since the negative pressure in a pressure introducing chamber 21 is made more intense than conventional cases and a sucked air flow rate detector 6 heightens the degree of opening of a Venturi valve 4, the effective cross-sectional area of a fuel jet 9 is made larger than the conventional cases so that the mixture concentration of a carburetor is increased in the starting and cold running of an engine. The high speed of the flow jetting from the ejecting section 31 is controlled by the orifice 30 and a regulating rod 29 depending on the temperature of the engine. |
