Abstract: A combination fuel introduction, distribution and air shaping device is provided for a fuel carburetion system of an internal combustion engine. The distributor is elongated and of generally inverted tear-drop cross-section. Fuel discharge openings are spaced longitudinally near or at the bottom of the distributor. The distributor extends across the intake air duct of an air-fuel mixing and modulating device that is adapted to deliver a mixture of finely divided fuel droplets in air to the intake manifold of an internal combustion engine. The body of the distributor divides the intake air flow into two converging air streams which entrain the fuel as liquid droplets sweeping it from a helically coiled wire extending along the downstream side of the distributor and uniformly distributing the droplets in the air streams.

Abstract: A combination fuel introduction, distribution and air shaping device is provided for a fuel carburetion system of an internal combustion engine. The distributor is elongated and of generally inverted tear-drop cross-section. Fuel discharge openings are spaced longitudinally near or at the bottom of the distributor. Spaced-apart teeth aligned with the fuel openings or other means to prevent liquid bridging and depend from the bottom or discharge side of the distributor. The distributor extends across the intake air duct of an air-fuel mixing and modulating device that is adapted to deliver a mixture of finely divided fuel droplets in air to the intake manifold of an internal combustion engine. The body of the distributor divides the intake air flow into two converging air streams which entrain the fuel as liquid droplets sweeping it from the downstream side of the distributor and uniformly distributing the droplets in the air streams.

Abstract: Discharge velocity of the air-fuel mixture being supplied through a variable venturi flow passage device to an internal combustion engine at idle to near idle operation of the engine is optimized by controllably varying the area ratio between the throat and exit planes of the device. Opposite jaw faces of the device define the flow passage that is gradually opened and closed in correlation to demand imposed on the engine between idle and full throttle operation. Area ratio control in one form is achieved by apparatus operative to selectively vary the diffuser angle between the opposing jaw faces. Area ratio control in another form is achieved by apparatus operative to effect a localized passage opening at idle of selectively different aspect ratio than the aspect ratio defined over the full longitudinal extent of the jaw faces.