Throttle structure for imparting supersonic flow...

F - Mech Eng,Light,Heat,Weapons – 02 – M

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F02M 31/00 (2006.01) F02D 9/12 (2006.01) F02M 9/127 (2006.01) F02M 31/087 (2006.01)

Patent

CA 1069783

Abstract of the Disclosure A combustible mixture of air and minute fuel drop- lets is produced for supply to the cylinders of an internal combustion engine. The engine includes a carburetor having a main air passageway in it, and an intake manifold inter- posed between the engine and the carburetor. The intake manifold includes at least one wall defining a plurality of fluid passageways operatively connected to the carburetor and to the combustion chambers of the engine. A throttle structure is mounted in the intake manifold. The combustible mixture is formed by introducing liquid fuel into a stream of intake air and uniformly distributing the fuel in the air by passing the air and fuel mixture through a constriction to increase the velocity of the mixture to sonic speed. The constriction occurs at the throttle structure in the mani- fold. The area of the constriction and the amount of fuel entering the air stream are adjustable for correlation with engine demand. After passing through the constriction, the air/fuel mixture is accelerated to supersonic velocity and thereafter decelerated to subsonic velocity to produce a shock zone where the fuel droplets are believed to be further subdivided. The supersonic and subsonic mixture speeds are obtained at the outlet of the throttle structure in the mani- fold. Thereafter, the mixture is inducted into the combustion chambers of the engine. Preferably, the throttle structure includes a cylinder movably mounted in the intake manifold. A plate either is suspended in or forms a part of the intake manifold. The plate and cylinder coact to provide the con- striction, supersonic and subsonic zones of the mixture flow. Means are provided on the cylinder for delimiting those zones of mixture flow.

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