Variable venturi carburetor

Gas and liquid contact apparatus – Fluid distribution – Pumping

Patent

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Details

261 39A, 261 44D, 261 62, 261 72R, 261121A, 261121B, F02M 702

Patent

active

040887154

ABSTRACT:
A variable venturi carburetor is described that functions in relation to an internal combustion engine to deliver a homogenous mixture of hydrocarbon fuel and air to the engine cylinders in response to vacuum pressure created through the cylinders. The carburetor includes axially movable venturi members for effectively changing the air volume entering through the primary air duct. Provision is made for maintaining a preselected volume of raw fuel available in a reservoir for instantaneous delivery in response to demand created through various throttle opening conditions. In addition to this feature, I provide mechanism by which the air-fuel ratio is appropriately adjusted automatically in response to changing throttle positions. This is done by changing the "head" or distance from the fuel reservoir level to the fuel outlet orifice, thereby changing the pressure requirements for drawing the fuel from the reservoir to the outlet orifice. A further provision is made in the form of a barometric sensing device that is operatively connected to the carburetor in order to automatically vary the air-fuel ratio in response to varying air pressure conditions at various altitudes.

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