Two-fuel carburetor
AssigneeF. Travers Burgess
InventorLeonard D. Boyce
Life of this patent
Estimating the term…
Abstract
An internal combustion engine carburetor is provided with means for introducing two separate types of liquid into the engine, one of the liquids being gasoline and the other a non-gasoline liquid, such as methyl alcohol, tertiary butyl alcohol, or other alcohols. The carburetor maintains the two liquids separate prior to their introduction into the Venturi to avoid problems normally incurred in blending other liquids with gasoline in liquid form and is constructed to prevent introduction of the non-gasoline liquid during normal idling and starting conditions and to introduce it in metered quantities during normal operation. To ensure vaporization of the two liquids in the primary Venturi, hot air at a temperature at least as high as the end point of the gasoline is introduced directly into the primary Venturi.
Claims10
In a carburetor for an internal combustion engine, an intake conduit, a pair of separate liquid chambers each having an outlet below the normal liquid level therein, separate normally open metering valves respectively controlling said outlets responsive to fuel requirements of the engine, a shut-off valve separate from said metering valves controlling one of said outlets independently of the respective metering valve, means controlling said shut-off valve responsive to engine temperature to maintain said shut-off valve closed during cold starting of the engine when the engine temperature is below a predetermined value and to open said shut-off valve during normal operation of the engine when the engine temperature equals or exceeds such predetermined value, and separate passage means connecting said outlets to the intake conduit and having discharge means thereinto at a level above the liquid level in said chambers.
In combination with an internal combustion engine having an intake manifold and an exhaust manifold, an intake conduit communicating with said intake manifold, a pair of liquid chambers for storing respectively gasoline and a liquid other than gasoline, each of said chambers having an outlet below the normal liquid level therein, separate normally open metering valves respectively controlling said outlets responsive to fuel requirements of the engine, a shut-off valve separate from said metering valves controlling the outlet from the chamber containing liquid other than gasoline independently of the respective metering valve, means controlling said shut-off valve responsive to engine temperature to maintain said shut-off valve closed during cold starting of the engine when the engine temperature is below a predetermined value and to open said shut-off valve during normal operation of the engine when the engine temperature equals or exceeds such predetermined value, and separate passage means connecting said outlets to the intake conduit at a level above the liquid level in said chambers, a primary Venturi centrally disposed in said intake conduit and having its throat slightly above the liquid level in said chambers, said separate passage means terminating in said primary Venturi, a thin wall heat exchange tube extending lengthwise through the exhaust manifold substantially throughout the entire length thereof, and a hot air transmitting tube communicating directly with the upper end of said primary Venturi and connected at its opposite end to said thin wall tube, whereby to transmit hot air from said thin wall tube to said primary Venturi for effecting vaporization of the gasoline and other liquid discharged into the primary Venturi through said separate passages.
Dependencies are inferred from the claim text.