| 摘要 |
PURPOSE:To suppress the change of an output, by forming a carburetor in a variable Venturi type and communicating a Venturi pressure chamber, provided in the upper of a piston valve pressure receiving part of the carburetor, to a surge tank in the upstream of the carburetor through a control valve in an internal-combustion engine with a supercharger. CONSTITUTION:A surge tank 9 and a variable Venturi type carburetor 8 are successively provided from the upstream side in an intake path 6 in the downstream of a supercharger. The carburetor 8 has a choke valve 16 and a throttle valve 15 respectively in the upstream and the downstream sides of a Venturi part 14a. The Venturi part 14a both opens a fuel nozzle 18 communicated to a float chamber 17 and arranges a piston valve 21 integrally formed with a needle valve 22 vertically moved by a difference in pressure between a Venturi pressure chamber 23 and an upstream pressure chamber 24. Then the Venturi pressure chamber 23 is connected to the surge tank 9 through a flow pipe 29 interposing an orifice 30 and a solenoid valve 31, thus electrifying the solenoid valve 31 to be opened when either one of the outputs from an engine speed or car speed detectors 36, 37 increases to a level above the specified value. |
