Downdraft carburetor for internal combustion engines
AssigneeDaimler-Benz Aktiengesellschaft
InventorsRoland Adam, Dieter Krauth, Hans-Otto Derndinger
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Abstract
The invention refers to a downdraft carburetor for internal combustion engines, the choke tube cross-section being controlled by a choke tube valve whose movement is controlled as a function of the control pressure in the choke tube by means of a diaphragm and lever with spring support. The choke tube and the choke tube valve have the shape of a venturi nozzle. The control of the choke tube valve is so arranged that the closing moment increases with closing of the choke tube valve. A damping system is provided which consists of a diaphragm box placed in the float chamber of the carburetor and which is connected by means of levers with the levers controlling the choke tube valve.
Claims4
A downdraft carburetor for internal combustiion engines, having
- a choke tube,
- a choke tube valve means, swivellable with a shaft and forming part of the choke tube wall, for controlling the magnitude of the cross-section of the choke tube,
- a spring-loaded diaphragm means,
- lever means for actuating the choke tube valve means in response to the spring loaded diaphragm means as a function of the control pressure in the choke tube
- a jet needle means attached to the diaphragm means for engaging a jet carrier opposite the choke tube valve, and comprising
- a first angular lever means rigidly connected to the shaft,
- rod means attached to the diaphragm means, the free end of the rod means being attached to the free end of one leg of said first angular lever means for moving the choke tube valve means, and
- a tension spring means for acting on another leg means of the first angular lever means for increasing the resulting closing moment due to the spring force and the effective lever arm on the closing of the choke tube valve.
Dependencies are inferred from the claim text.