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US 4,783,286 AGranted
Rotor-actuating carburetor with variable venturi tube
OwnerTien-Chu Leeinventor
Life of this patent
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Abstract
A carburetor includes a throttling rotor formed as a semi-circular cylinder rotatively mounted in an induction casing to operatively define a variable throat section of a venturi tube between the rotor and fuel nozzles mounted on one side of the casing opposite to the semi-circular cylinder, corresponding to an engine running speed, so as to enforce a sound mixing of a fuel as sucked by an air stream when passing through the throat section for increasing the efficiency of fuel combustion and engine running.
Claims8
A carburetor with variable venturi tube comprising:
- an induction casing including a cylindrical rotor chamber longitudinally formed on a central portion of said casing, an air inlet formed on an upper portion of said casing having a contraction portion formed on an lower portion of said inlet duct communicated with said cylindrical rotor chamber, an air outlet duct formed on a lower portion of said casing having an expansion portion formed on an upper portion of said outlet duct communicated with an engine cylinder, and a pair of rotor holes formed at two opposite ends of said rotor chamber of said casing;
- a throttling rotor including a semi-circular cylinder portion longitudinally formed on a central portion of said rotor, a pair of side wheels formed on two opposite ends of said semi-circular cylinder portion rotatably mounted in said pair of rotor holes of said casing, and a driving shaft formed on two ends of said rotor operatively driven by a wire connected to an accelerator pedal;
- a fuel injecting means mounted on a right portion of said casing having an air-drafting surface formed as a generally vertical plane and facing oppositely to said semi-circular cylinder portion of said rotor, a primary nozzle protruding leftwardly from the air-drafting surface to circumferentially dispose above said semi-circular cylinder portion, a secondary nozzle having a V-shaped slit longitudinally formed on the air-drafting surface of said fuel injecting means, a primary mixer fluidically communicated between the primary nozzle and a flat chamber mounted on a right side of said casing, a secondary mixer fluidically communicated with the secndary nozzle and the float chamber, said semi-circular cylinder portion of said rotor operatively defining a throat section of a carburetor venturi tube with said primary nozzle and said secondary nozzle when rotated along a longitudinal axis of said rotor;
- and
- said float chamber filled with fuel oil secured on a right side of said casing, whereby upon a draft of an air stream flowing through said inlet duct, the throat section defined between said rotor and said nozzles to said outlet duct, a suction force is developed at the throat section to adjustably suck fuel oil from said float chamber through said secondary nozzle on through both said primary and secondary nozzles, depending upon an engine running speed.
2 more elements
Dependencies are inferred from the claim text.