| 摘要 |
PURPOSE:To provide the function of a ordinary negative-pressure type compound-type carburetor for a compound-type carburetor installed on the downstream side of the compressor of a turbo engine by permitting opening and closing operation of a secondary throttle valve through utilization of the feeding air stream of the primary air feeding cylinder. CONSTITUTION:During the widely opened operation of a primary throttle valve 15, the pressure in the second pressurization chamber 33 close to an air feeding port part 17 increases larger than the pressure of the first pressurization chambe 32 close to a venturi part, and pushes-up a diaphragm 31 against a spring 36, and the valve plate 35 of a connecting pipe port 34' is opened, and the pressure close to the air feeding port part 17 acts into the pressurization operating chamber 41 of a second throttle valve controlling actuator 40 through a connecting pipe 34, and then a diaphragm 42 is lowered against a spring 45, and a control rod 44 is lowered to open the second throttle valve 24. As the number of revolution of a turbine increases, and the differential pressure between the venturi part of the first air feeding cylinder and the air feeding part 17 increases larger, the control rod 44 is lowered remarkably and the opening of the second throttle valve 24 is increased. |
