Enhanced performance carburetor system
First Claim
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1. Apparatus, comprising:
- (a) a propane carburetor;
(b) means for providing propane fuel to said carburetor;
(c) means for providing an airflow through said carburetor;
(d) said carburetor including an air-fuel mixing chamber having an intake port for receiving said airflow, an exhaust port, and a venturi throat between said intake and exhaust ports; and
(e) fuel metering means connected to receive and distribute said propane fuel, said fuel metering means comprising a hollow tube having a single row of apertures located in a sidewall thereof, said tube being positioned transversely across the entire venturi throat with the openings of said row of apertures facing downstream of said airflow.
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Abstract
A spud end fuel metering tube in an air-fuel mixing passage in a propane carburetor for enhancing performance of the system. The fuel supplying spud end is located in a venturi throat within the mixing chamber of the carburetor. The spud end includes linearly aligned fuel supply apertures that face downstream of the airflow therethrough. This combination provides increased power and fuel economy over a wide range of RPMs and demand levels while substantially reducing undesirable pollutant emission levels. The butterfly valve of the carburetor includes apertures formed therein for permitting the engine to idle when the butterfly valve closes eliminating the necessity for other downstream ports.
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Citations
23 Claims
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1. Apparatus, comprising:
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(a) a propane carburetor; (b) means for providing propane fuel to said carburetor; (c) means for providing an airflow through said carburetor; (d) said carburetor including an air-fuel mixing chamber having an intake port for receiving said airflow, an exhaust port, and a venturi throat between said intake and exhaust ports; and (e) fuel metering means connected to receive and distribute said propane fuel, said fuel metering means comprising a hollow tube having a single row of apertures located in a sidewall thereof, said tube being positioned transversely across the entire venturi throat with the openings of said row of apertures facing downstream of said airflow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In combination with a propane carburetor which includes means for receiving propane fuel, an air-fuel mixing chamber having an intake port for receiving airflow, an exhaust port, and a venturi throat between said intake and exhaust ports, the improvement of which comprises:
fuel metering means connected to receive and distribute said propane fuel, said fuel metering means comprising a hollow tube having a plurality of apertures linearly aligned along a sidewall thereof, said tube being positioned transversely across the entire venturi throat with the openings of said plurality of apertures facing downstream of said airflow. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A propane carburetor, comprising:
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a body; an air-fuel mixing chamber extending through said body; said air-fuel mixing chamber including an intake port for receiving airflow, an exhaust port, and a venturi throat between said intake and exhaust ports; and fuel metering means for receiving and distributing propane fuel, said fuel metering means comprising a hollow tube having a plurality of apertures linearly aligned along a line parallel to the axis of said tube, said tube being positioned transversely across the entire venturi throat with the openings of said plurality of apertures facing downstream of said airflow. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification